When the air pressure within the alveolar spaces falls below atmospheric pressure, air enters the lungs (inspiration), provided the larynx is open; when the air pressure within the alveoli exceeds atmospheric pressure, air is blown from the lungs (expiration).
To result in an action potential in the central nervous system, EPSP's must ____ through temporal and spatial summation to ____ threshold voltage.
O add up; exceed
O accelerate; reach
O flow; polarize
O sum; activate
Answer:
accelerate; reach
Explanation:
EPSPs fire to trigger action potentials in the postsynaptic cell, by getting the membrane potential to threshold at the axon hillock true, or initial segment of the axon
synaptic knob can fire several times, as others fire as well, so EPSPs can be summed or added; the whole cell body depolarizes, causing current flow, eventually causing an AP to propagate down the axon if brought to threshold at the axon hillock/initial segment.
-remember, as one synaptic knob firing causes 0.5mV charge, you need much more than one to get to threshold.
T/F: if a knob is closer to the axon hillock, more charge will get to it
EPSPs, as described above, are what happens in efferent neurons, which go to effectors, and in interneurons, which are found in the CNS between afferent and efferent neurons
-we already covered afferent neurons, which cause APs to fire in the membrane next to the receptor (toward the CNS)
How much colder was Tuesday then Saturday? if Tuesday is 55 degrees and Saturday is 60 degree
If the volume of all water on earth is 1,386,000,000 cubic kilometers What cubic kilometers are accessible surface water
This sphere's volume would be around 2,551,000 [tex]mi^{3}[/tex](10,633,450 [tex]km^{3}[/tex]), and its diameter would be approximately 169.5 miles (272.8 [tex]km[/tex]). Yes, all of this water is fresh water, which we all use on a daily basis, but a large portion of it is underground and inaccessible to humans.
The biggest sphere, which would represent all the water on, in, and above the Earth, would have a volume of around 332,500,000 cubic miles ([tex]mi^{3}[/tex]) (1,386,000,000 cubic kilometers ([tex]km^{3}[/tex]) and a diameter of approximately 860 miles (almost 1,385 kilometers). The oceans contain over 96.5 percent of the planet's total water, covering about 71 percent of its surface. Only 3% of the water that makes up the surface of the globe comes from freshwater sources. This means that the total amount of water on the surface of the world is 1,386,000,000 [tex]km^{3}[/tex]. Fresh water volume is equal to 3% of 1,386,000,000, or 41,580,000 [tex]km^{3}[/tex].
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The structure labeled as x is the___, so the cell in the image is a ____. The structure labeled as w is the ___, so the cell in the image is a ___
The cell in the photograph is a Eukayotic cell since the structure with the label "x" is the nucleus. The cell in the image is a plant cell since the component marked with the letter "w" is the chloroplast.
What is plant cell?
Plant cells are the essential building element of life in species of the order Plantae. These cells, which are referred to as eukaryotic cells, contain a true nucleus as well as specialized parts called organelles that have various functions. Only in plants are chloroplasts, specialized organelles that utilise photosynthesis to make sugars in their cells.
Eukaryotic cells found in plants differ significantly from those seen in other eukaryotic organisms in a number of significant ways. One of the traits that sets a plant cell apart from other cells is the presence of a cell wall outside of the cell membrane.
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Researchers collected data about the heart rates of
humans aged 5 to 90 years. They represented the data in a
graph.
Which statement is the best explanation of the pattern in the data?
A. The data show that increasing age causes an increase in heart
rate
8. The data show neither correlation nor cause between age and heart rate
C. The data show a correlation between age and l
D. The data show cause but not correlation between age and heart
rate
Answerحبيبي والله انا نخبة معرفش يعني بس لو تبا الحل اسأل مس سيمة
جاوب السوال واضح
A biologist might study all of the following except
Multiple choice question.
the motion of planets
ways to protect plants and animals
the diversity of life
ways to improve agriculture
A biologist might study all except the motion of planets
Biologist study about living organisms which include all aspects of plants, animals and microorganisms. The ways to protect plants and animals, the diversity of life and ways to improve agriculture all comes under biology except for the motion of planets.
Astronomy is the study of objects in the universe that includes motion of planets. Kepler’s laws of planetary motion describe in detail about the motion of the planets in our solar system.
Thus, biologist study about the ways to protect plants and animals, the diversity of life and ways to improve agriculture except for the motion of planets.
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Explain the scale of cells and the technology that helps us observe them.
Cells can vary in size from a few micrometers(μm) to hundreds of micrometers in diameter. Cells cannot be easily seen through normal eyes. Cells can be studied through microscopic techniques.
What are microscopic techniques?Cells are the smallest unit that can survive independently. It is not possible to study the cells through normal eyes. For the proper observation of objects different microscopic techniques are used. These tools help in magnifying the image of cells.
There are mainly three branches of microscopy- optical, electron and scanning probe microscopy. For the study of cells, transmission and scanning microscopy are widely used techniques.
In principle, transmission electron microscopy is similar to the bright-field light microscope. A scanning electron microscope is an electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons.
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627272728828281910919192992
Answer:
These are numbers.
Explanation:
Mark me as brainliest
Water is the most abundant molecule in the body, but it is not a biomolecule. Neither are carbon dioxide,
ethanol, or methane. Review the definition of a biomolecule and the structure of these biomolecules
compared to glucose and alanine, and explain why glucose and alanine are important and common
molecules are not biomolecules.
A biomolecule is one that is created by a living thing by definition. Water is therefore the external supply of carbon dioxide that living things use to manufacture proteins to fulfill their energy needs.
Water molecules have a slightly positive and a slightly negative side as a result of the unequal sharing of electrons.
There is neither a positive nor a negative side to some molecules, as ethane.The unequal distribution of electrons within the polar molecule is what distinguishes polar (water) from non-polar (ethane) molecules. Covalent bonds in nonpolar molecules have an equal number of electrons.Within aqueous solutions, water is universalizing everything formed from atoms and molecules.Molecules of two or more substances are combined in a homogenous manner to form solutions. Typically, the chemical with the highest concentration is the solvent. Some chemicals are soluble in little doses.Learn more about biomolecules here:
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What is the Lymphatic system?
The lymphatic system, or lymphoid system, is an organ system in vertebrates that is part of the immune system, and complementary to the circulatory system. It consists of a large network of lymphatic vessels, lymph nodes, lymphatic or lymphoid organs, and lymphoid tissues. The vessels carry a clear fluid called lymph (the Latin word lympha refers to the deity of fresh water, "Lympha") back towards the heart, for re-circulation.
Unlike the circulatory system that is a closed system, the lymphatic system is open. The human circulatory system processes an average of 20 litres of blood per day through capillary filtration, which removes plasma from the blood. Roughly 17 litres of the filtered blood is reabsorbed directly into the blood vessels, while the remaining three litres are left in the interstitial fluid. One of the main functions of the lymphatic system is to provide an accessory return route to the blood for the surplus three litres.
The other main function is that of immune defense. Lymph is very similar to blood plasma, in that it contains waste products and cellular debris, together with bacteria and proteins. The cells of the lymph are mostly lymphocytes. Associated lymphoid organs are composed of lymphoid tissue, and are the sites either of lymphocyte production or of lymphocyte activation. These include the lymph nodes (where the highest lymphocyte concentration is found), the spleen, the thymus, and the tonsils. Lymphocytes are initially generated in the bone marrow. The lymphoid organs also contain other types of cells such as stromal cells for support. Lymphoid tissue is also associated with mucosas such as mucosa-associated lymphoid tissue (MALT).
Source : Wikipedia
What are estuaries what feature allows them to be great spawning grounds for a wide variety of fish and shellfish
MAIN ANS
EXPLANATION
LINK
HASHTAG
Estuaries are partially enclosed water bodies.
Water bodies called estuaries and the marshes that surround them are typically found where rivers and the sea converge.
Unique plant and animal communities that have adapted to brackish water, which is a mixture of fresh water that drains from the land and salty ocean, can be found in estuaries.
Many of the environmental services and features that brackish estuaries provide, such as acting as natural runoff filters and functioning as nursery grounds, are also provided by these freshwater estuaries.
They have clean water and provide a safe growing and protected environment and hence are great spawning grounds for a wide variety of fish and shellfish.
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What is the independent and dependent variable?
What would be the benefits and drawbacks of having oil or alcohol as your main body fluid when it comes to cooling?
Answer:
Blowing on your wet hand helps the water and alcohol to evaporate. The airflow will also support the heat transfer away from your skin.
Explanation:
For each of the following, state whether it is an organelle, a cell, a tissue, an organ, an organ system or an organism
A heart
B trachea
C onion epidermis
D onion bulb
E onion plant
F human being
G lungs
Answer:
all of the organs are needed for the human body
In what form is phosphorus mostly commonly found in the environment?
A. Inorganic phosphate
B. Elemental phosphate
C. Calcium phosphate
D. Phosphorus Acid
It is clear that the form in which phosphates mostly occur is the Inorganic phosphate.
What are elements?Elements are the smallest indivisible particles of a substance that is capable of independent existence. Now we know that phosphorus is one of the most abandonment elements on earth because it is part of rocks and many soil formations on the earth.
There are many inorganic elements and compounds that could be found in nature especially in the soil and these are mostly found in rocks as well as the soil.
Thus, we it is clear that the form in which phosphates mostly occur is the Inorganic phosphate.
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20 POINTS!
Which statement best represents how structure relates to function?
Labrador retrievers can be black, yellow, or chocolate colored.
Tortoises in the wild can live for more than 150 years.
People can develop a tolerance for spicy food over time.
A deer's horizontal pupils help it scan the horizon for predators.
The statement that best represents how structure relates to function is as follows: a deer's horizontal pupils help it scan the horizon for predators (option D).
How does structure of an organism relate with function?A structure is an overall form or organization of organs, tissues, cells etc. in living organisms.
Living organisms are directly dependent on certain structures in their morphology to survive. This is because these structures perform specific functions that determine their survival.
Examples of structures found in living organisms and the function they perform are as follows:
Eyes - sightRadula - feeding in snailsCilia and flagella - for movement and locomotionRoot hairs - for absorptionTherefore, the statement that best represents how structure relates to function is as follows: a deer's horizontal pupils help it scan the horizon for predators.
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Which cell structure would be found in a plant cell but not in an animal cell?
A. Permeable cell membrane
B. Large central vacuole
OC. Membrane-enclosed nucleus
OD. Endoplasmic reticulum
Answer:
B
Explanation:
hope this works for you :)
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Identify three (3) social and cultural
perspectives
an individual may possess.
1:3
Cultural Perspectives: nationality, race, gender
Social Perspective: Symbolic Interactionist Perspective, Structural Functionalist Perspective
A cultural perspective can be defined as:
“Cultural perspective refers to the way individuals are shaped by their environment and by social and cultural factors.These factors include a person’s nationality, race and gender.”
What is a sociological perspective?
"The sociological perspective is to see through the behavior of people and the appearance of organizations" (Berger, 1963). A sociological perspective looks at society through a lens that excludes personal opinions. Generalize individual causes and behaviors into patterns and categories.The Symbolic Interactionist Perspective:
The Symbolic Interactionism perspective, also known as Symbolic Interactionism, encourages researchers to explore symbols and nuances, their meaning and their impact on the interactive relationships of everyday life.
A Structural-Functionalist Perspective:
In sociology and other social sciences, structural-functionalism is the view that all the institutions, relationships, statuses, and practices that make up society have a purpose and are essential to the sustained functioning of other members and of society as a whole. function as a school. .
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What is used to help model chemical bond formations?
Answer: Shared-electron (covalent) model
Explanation:
Lewis in 1916, and it remains the most widely-used model of chemical bonding. It is founded on the idea that a pair of electrons shared between two atoms can create a mutual attraction, and thus a chemical bond.
Consider how lettuce or spinach placed in water becomes firm and crisp. Use what you have learned about cell membranes to explain this observation. Be sure to include homeostasis in your explanation.
Cell membrane is semi-permeable outer covering of an animal cell. Cell membrane allows the transport of substance into and out of the cell. When the spinach and lettuce are placed in water they become firm and crisp due to endo-osmosis of water.
What is a Cell Membrane?A cell membrane is the outermost covering in the animal cell and it is covered by the cell wall in the plant cells. Cell membrane is responsible for the transport of materials into and out of the cell.
Cell membrane is semi-permeable in nature that means it only allows some substances to pass through the membrane and block others. Osmosis and diffusion are the processes through which substance pass. When a cell is placed in water, the concentration of water is low inside the cell as compared to the solution. In this case, water travels from its high concentration to its low concentration into the plant cell and the leaves swell and become crisp.
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The stomach secretes _______________________, __________________ and
_________________ which act on food
The stomach secretes hydrochloric acid, digestive juices and
enzymes which act on food.
Explanation:The stomach secretes water, electrolytes, hydrochloric acid, and glycoproteins, including mucin, intrinsic factor, and enzymes. Gastric motility and secretion are regulated by neural and humoral mechanisms.
Studying the folding patterns of protein molecules can help microbiologists better understand cellular processes as well
as some diseases, such as Alzheimer's, that are caused by proteins that have misfolded. The folding of these
complicated molecules can be simulated on computers, but it takes a lot of processor power and time for even
expensive supercomputers to do this.
A group of researchers at Stanford University developed software that can be used to distribute the processing of data to
anyone who is willing to donate time on their idle personal computers. As a result, the researchers have been able to
achieve protein-folding simulations that are far better than those other computing methods have done. Which statement
best describes the work of these researchers?
Running an experiment required the researchers to use ingenuity to tackle an issue.
The correct answer is "Running an experiment required the researchers to use ingenuity to tackle an issue."
It is the best choice since researchers can process data on anyone's computer who wishes to lend it to them, thanks to software that scientists created. In other words, they came up with a clever solution to the time and financial constraints that the simulation of these proteins folding had.Since the data can be replicated using the program, the work qualifies as scientific, and the fact that the data were not processed in a single location does not change this.The researchers employed more than just tried-and-true scientific methods. It is not a proven scientific method for anyone to be able to contribute time from their computer using software.In conclusion, the answer given above is the best one. Scientists employed ingenuity to find a solution; otherwise, it would have cost time and money to slow down or cease the research.To learn more about protein molecules visit:
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What’s the answer???
Answer:
ObservationProblem questionExplanation:
This is an observation because the person noticed the lake was brown. They then wondered why the lake was brown, so that becomes a problem question.
Hope this helps.
Which type of anthropologist would most likely study living savanna baboons
in their natural habitat?
O Primatologists
O Forensic anthropologists
O Archaeologists
O Cultural anthropologists
O None of the answers are correct
Answer:
Primatologists
Explanation:
Primatologists are scientists who study primates, such as gorillas, orangutans, chimpanzees, and lemurs. The other anthropologists: forensic anthropologists, archaeologists, and cultural anthropologists study mostly humans, not non-human primates.
hi can you help me with question
Answer:
Look at this....................It should help you
Drag each tile to the correct box.
Because of genetic variation, a species of beetle has two different body colors, red and green. This species exists in a grassy environment that’s mostly green. A new species of bird that eats these beetles enters the area. Arrange the steps of natural selection in the correct order.
Green beetles and red beetles exist in the environment.
Green beetles pass on their color trait to future offspring.
Birds that eat the beetles move into the environment.
Red beetles are eaten by birds, but green beetles aren’t eaten.
The entire population of beetles eventually becomes green in color.
This is an example of directional selection. Under the environmental pressure of birds eating beetles, natural selection favors the green phenotype over the red one. The correct order is 1, 3, 4, 2, 5.
What is directional selection?Directional selection is one type of natural selection, and increases the proportion of individuals with an extreme phenotypic trait.
There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
In thee xposed example,
there are beetles of two different body colors, red and green.substaret color is mostly green.the bird is a predator that uses its sight to hunt beetles.The selective environmental pressure is the birds, which prey on beetles.
Red beetles are exposed because their color contrasts with green grass.
On the other hand, green beetles manage to camouflage on the green substrate.
Birds, who use their sight to hunt, can see red beetles better. So they exert more pressure on these individuals.
Green beetles who survive hunting, reproduce and pass their genes to the following generations.
The green phenotype spreads on the population until the whole population becomes green.
According to this sequence of events, the correct order is as follows
1. Green beetles and red beetles exist in the environment.
3. Birds that eat the beetles move into the environment.
4. Red beetles are eaten by birds, but green beetles aren’t eaten.
2. Green beetles pass on their color trait to future offspring.
5. The entire population of beetles eventually becomes green in color.
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Answer:
bro above me is correct
its 1,3,4,2,5 :)
Explanation:
What historical, political or geographical factors contribute to this difference in renewable energy consumption? List at least three different factors.
The historical, political or geographical factors that contribute to the difference in renewable energy consumption are energy generation, the dependence of natural resources that are uncontrollable by man, problems of energy quality and location of the resource.
What are the problems of renewable energy?One of the main challenges for generating energy from renewable sources is economic. Investing in energy matrices from renewable sources has a high cost, in addition to being considered a risky investment.
What are the problems of non-renewable energy?Non-renewable energy is also considered a type of dirty energy, as it causes damage to the environment and also to man, such as the destruction of ecosystems, global warming, acid rain, the greenhouse effect, among many other problems.
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11 Answer:
Some bacteria use air movements to carry them from one place to
another, while others are _____, moving through the use of attached
filaments.
12 Answer:
Too small even to be considered a microorganism, _____ are among
the simplest forms of life on Earth, consisting only of genetic
material (DNA or RNA) surrounded by a protein coat.
13 Answer:
Preventing microbial contamination of a food involves controlling
_____, contamination, temperature� and moisture levels during processing.
Answer:
11: Non-Mobile (unable to move on their own or in the air).
12: Cells (?).
13: Sanitization (?).
Hope this helps <33 (sorry if any of this is wrong).
Giving brainiest to whoever helps me with this question. (Very Hard)
Answer:
Basically you need to get several goldfish and different containers that are a different water temperature.
Explanation:
Get your goldfish. About 3-4 because the water should affect each of them about the same, so you want to make sure that it is the same outcome each time and not just a fluke.Get your water containers. Ideal water for goldfish is about 68-74 degrees. Anything below 68 is considered to cold, and anything about 74 degrees would be considered to hot. However, with this experiment, you will need "cold" water (anything under 67 degrees ideally anything under 55 degrees would be nice and "cold" for the fish), ideal water (68-74 degrees), and then "hot" water (anything above 75 degrees. Ideally about 77 - 85 degrees would be hot enough for them)Next I'd say form your hypothesis. When water is too cold, goldfish may stop eating, begin hibernating or die. When the water is to hot goldfish will become very stressed, and can overheat and die. So, choose a hypothesis from that.Your independent variable would be the water temperature, because it doesn't depend on anything. While how your goldfish act would be the dependent variable because they act according to the water temperature.Good luck with your experiment, and this is all I got for ya! Good luck!
Which field of earth science would be involved in studying the surface features of Jupiter's moons?
The field of Earth science would be involved in studying the surface features of Jupiter's moons is Geomorphology.
What is Geomorphology?Geomorphology, which literally means the study of the shape or form of the Earth, focuses mostly on the topographical characteristics of the planet's surface. It is focused on how landforms are categorized, described, and how they came to be.
The study of landforms and their evolution is known as geomorphology. Both qualitative and quantitative research have traditionally been done on the subject, with the former focusing on the description of landforms and the latter on the forces acting on the Earth's surface to create and alter landforms.
In conclusion, the correct option is Geomorphology.
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