Answer:
The depolarization of the smooth muscle cell membranes triggers the potential for contraction action, since the endoplasmic reticulum releases calcium in the intraplasmic zone, causing myosin and actin to unite, generating a sweeping movement and bringing the z lines of the sarcomero.
Smooth muscle contractions are more sustained over time by the distribution and type of muscle fiber, as they are more tapered.
Explanation:
The smooth muscle is that muscle that controls non-voluntary contractions, that is, controlled by the somatic nervous system, and is not related to locomotion but rather to involuntary movements such as intestinal motility, vascular contraction, etc.
The sliding of myosin and actin filaments over one another causes smooth muscle contraction. The hydrolysis of ATP provides the energy for.
Smooth muscle cell:Smooth muscle lacks the calcium-binding protein troponin, which is found in cardiac and skeletal muscle. Smooth muscle fibers, unlike skeletal muscle fibers, usually contract slowly and synchronously. The electrical connection of smooth muscle by gap junctions causes the smooth muscle fibers to synchronize.
When the communication from the motor neuron stops, the sarcolemma and T-tubules repolarize, and the voltage-gated calcium receptors in the sarcoplasmic reticulum shut. Ca++ ions are subsequently returned to the sarcoplasmic reticulum, causing tropomyosin to re-cover the actin strands' binding sites. When a muscle runs out of ATP and becomes exhausted, it might also stop contracting.
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DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects because they are resistant. Propose a hypothesis as to why these organisms have become resistant to the chemical.
Answer:
None of the individual insects should have possessed genomes that made them resistant to DDT.
Explanation:
Pesticides such as DDT have been considered one of the best way to kill insects in the past. But with time, farmers have observed that this is not an authentic method. This is because the insects can gain resistance to the pests if they are exposed to the pesticide again and again. Even they could transmit these resistant genes in their offsprings. Hence, DDT will become useless against insects over time.
A cylinder at left with balls evenly spaced throughout the cylinder has an arrow leading to a cylinder at right cylinder with balls stacked near its bottom. How is energy related to the change of state represented by the model? Atoms gain energy as a gas changes to a solid. Atoms gain energy as a gas changes to a liquid. Atoms lose energy as a gas changes to a solid. Atoms lose energy as a gas changes to a liquid.
Answer:
C. Atoms lose energy as a gas changes to a solid.
Explanation:
Physical changes of matter take place by adding or removing energy from the matter.
In the given images, The left cylindrical is showing gas phase while the right cylindrical is showing a solid phase.
The process of conversion of gas into solid is called deposition. Deposition process takes place when atoms lose their energy and have high kinetic energy so they directly convert into solid and not into liquid.
Hence, the correct option is "C".
Answer:
c i took the quiz
Explanation:
what causes metamorphoic rocks to form from existing rocks
Answer:
metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.
Assume a population of deer has a crude birth rate of 36 per 1,000/yr, a crude death rate of 20 per 1,000/yr, an immigration rate of 15 per 1,000/yr, and an emigration rate of 8 per 1,000/yr. What is the population growth rate
Answer:
0.023%
Explanation:
The Population growth rate is a change in population with time taken into consideration. It can be expressed with the formula
[tex]N/t[/tex] where N is the total change in the population size, and t is time.
When immigration and emigration are factored in, we now have the formula;
[tex](CBR +I) - (CDR + I)/1000[/tex]
[tex]= (36 + 15) - (20 + 8) = 51 - 28= 23\\\\expressing as a percentage of the population gives us,\\\\23/1000=0.023%\\\\[/tex]
Help Res
Is there a symbiotic
relationship between
plants and water? If so,
what effect does it have on
their ecosystem?
A. Yes, there is a symbiotic
relationship that is beneficial to both.
B. No, this would not be a symbiotic
relationship
C. Yes, there is a symbiotic
relationship that is beneficial for the
plant but harmful to the water.
Answer: i think its a
Explanation:
In melosis, the homologous chromosomes are side by side. Are they side by side in mitosis?
Prokaryotes, like most living organisms, need movement to locate food and to survive.
Answer:
Explanation:
Prokaryotes, like most living organisms, need movement to locate food and to survive. If a prokaryote needed to move to a new food source, which structure would it use for locomotion?
Ms. Fisher is a 68-year-old woman with the classic symptoms of gallbladder disease. She is diagnosed with gallstones and is scheduled for surgery in 2 weeks . She asks you about the cause of gallstones and why she would develop them. How would you respond to her?
Answer: I will respond as this;
Gall stones develop from the chemical makeup imbalance of the bile inside the gall bladder which can increase in the levels of cholesterol, and cholesterol levels is increase, the excess form into stones.
Mrs Fisher can develop gall stones because she is 40 years and above and she is a female. Age and sex are the risk factors of gall stones
Explanation:
Gallstones are solid particles that are developed from bike cholesterol or bilrubin build up.
It Is caused by can increase in the levels of cholesterol, and cholesterol levels is increase, the excess form into stones.
Symptoms include .
The most common symptom is pain in the right upper part of the abdomen.
nausea and vomiting,
fever,
indigestion, belching, bloating,
intolerance for fatty or greasy foods, and
jaundice (yellowing
Mrs Fisher can develop gall stones because she is 40 years and above and she is a female. Age and sex are the risk factors of gall stones.
Women that had have children also are at risk of having gall stones.
The most effective treatment is surgical removal of the gallbladder, or cholecystectomy
Part D
Cervical pregnancies are extremely rare. Women undergoing cervical pregnancies often experience unusual vaginal bleeding. In extreme cases, they may require a hysterectomy (removal of the uterus). Why do you think the symptoms and risk occurs with this type of ectopic pregnancy?
Answer
The places where the fertilized egg got implanted are not appropriate
for the fetus´ development. These places lack space and needed tissues.
Explanation:
Ectopic pregnancies occur most often in the Fallopian tubes, which are the structures that transport the eggs from the ovaries to the uterus. But some other times, ectopic pregnancies might also occur in ovaries, abdominal cavity, or in the cervix.
These pregnancies are not viable, this means that the fertilized egg can not survive. However, the firsts stages of its development seem to be normal and involve an increase in tissues surrounding the egg.
As the places where the egg got implanted are not prepared for its development, they might be harmed. These areas do not have enough space, nor nutritional tissues needed by the embryo. And as the fetus grows, it creates a constant pressure in the organ, that can make it burst. This provokes important bleeding that might cause the patient´s death if they are not properly assisted.
At first, the woman might feel the normal symptoms of pregnancy, like the lack of the period during the firsts months or breast sensitivity. But as the egg grows in the inappropriate place, there appear some new signs and symptoms, such as a light bleeding or pelvic pain. If the organ bursts, the bleeding might be so intense that the woman might be in danger.
Answer:
Bleeding would occur because the baby is growing near the vaginal canal, which leads to the outside of the body. The cervix is the bottom portion of the uterus, so if the uterus is damaged, the entire uterus may need to be removed.
Explanation:
answer from Plato
for edmentum
One characteristic of fungi is that they have a cell wall made of chitin. What are two other characteristics of fungi? Produce spores and heterotrophic Contain membrane-bound nucleus and photosynthetic Heterotrophic and produce seeds Absorb food and photosynthetic
Answer:
Produce spores and are heterotrophic
Explanation:
All animals and fungi are heterotrophic and fungi produce spores which is how they reproduce.
Answer:
Produce spores and heterotrophic
O Consider the diagram that depicts the lysogenic and lytic cycles. The steps of the lysogenic cycle are shown. In Step A, attachment and entry occurs. In step B, the provirus is formed. In step C, the cell begins to divide. In step D, the provirus leaves. In step E, the virus is replicated and assembled. In step F, lysis and release of the virus occurs. In which step of the diagram is the provirus formed? step A step B step E step F
The correct answer is Step B
Explanation:
The lysogenic and lytic cycles are processes of replication for viruses. These two processes involve different steps. In general, the first stage involves attachment and penetration as the virus enters the host cell. This step is followed by the provirus, which means the genome of the virus is integrated into the DNA of the cell, this step is also mentioned in the model as part of step B "the provirus is formed". Moreover, the formation of the provirus is key as the nutrients of the host cell and genome are used for replication. Thus, in the diagram, the provirus is formed in step B.
Answer:
step b on edge is your answer
Explanation:
can i get a brainliest?
1. One important feature of DNA is that it can be accurately copied and inherited from one generation to the next. Imagine if DNA was NOT accurately replicated. What errors could occur and how would they affect the offspring in the next generation
Answer:
Explanation:
If DNA is not accurately replicated it can lead to mutation. Mutation is a genetic disorder that occur when a change occur and affect the genome of an organism. It can be result in frameshift mutation shifting nucleotide arrangement.
When DNA is not accurately replicated, it could lead to formation of an entirely new protein different from the original which has a different function this could lead to a form of disorder in the offspring. The effect of this disorder depends on it severity.
While sitting at your desk, you drop your pencil onto the floor. You bend over to pick up the pencil. In order to straighten up and continue your exam you must use which muscles?
Answer:
Deltoid muscle
Trapezius muscle
Carpel muscle
Quadriceps
Hamstrings
Glutes
Abdominal muscles
Question 8 (5 points)
Which of the following best describes the mechanism by anti depressant
medications function?
Provide a positive rush of the neurotransmitter dopamin-
Made of artificial neurotransmitters that generate exciter
O Allow the body to prochyce more neurotransmitters such a
serotonin
Answer:
Help maintain a balance in neurotransmitters such as serotonin
Explanation:
Anti-depressant medications help the body maintain a balanced, homeostasis level of neurotransmitters, often serotonin.
What type of feedback loop is breathing?
what is a type of emigration where offspring move
away from their parents.
Answer:Dispersal
Explanation: This refers to offspring moving away from their parents. This prevents the offspring from competing with the parents for resources such as light or water. For example, dandelion seeds have “parachutes.” They allow the wind to carry the seeds far from the parents
Which sequence correctly represents the order of events during egg formation?
Answer:
The egg is made by the hen. It creates an embryo (the future chick, the little white spot that you see on the egg yolk) which will be fed by the yolk of the egg.
The yolk is a food reserve (called the yolk) for the chick in formation: by eating the yolk, the embryo becomes a chick.
The white consists of gelatinous proteins, which the future chick will eat during incubation, warm for 21 days under the hen.
The shell protects the embryo, the yolk and the white. It is made of two membranes that are made from calcium that the hen stores in her bones and intestines. In the chicken's belly, muscles spin the egg during training and give it its perfect shape.
The shell is made in such a way that it is difficult to the pan from the outside, but very easy to break it from the inside. So the hen does not crush her eggs when she is brooding, but the chick can come out easily!
It works pretty much the same for all birds, reptiles, fish ... that lay eggs. On them, moreover, oviparous animals.
Explanation:
Once set up, solar energy is inexpensive to convert to a useful form, for every day use.
True/False
Answer:
Hey there!
The answer is true, making solar energy one of the most cost effective sources of energy.
Let me know if you need more help :)
Answer: True!
Explanation:
Once set up, solar energy is inexpensive to convert to a useful form, for every day use.
All you need to do is get the converter and convert the suns energy!
Justin is a 24-month-old male with multiple food allergies, including milk, eggs, and peanuts. At six months old a cooking utensil that had been used to cook eggs touched his arm and his mother noticed a significant dermatological response. As a result, Justin’s pediatrician advised her to avoid eggs, cow’s milk, and peanuts in Justin’s diet until food allergy testing could be done at two years of age. Fortunately, Justin hasn’t had any negative reactions to soy milk. Food allergy testing has confirmed that Justin needs to continue to avoid cow’s milk and peanuts. His pediatrician plans to conduct food allergy testing annually and advises his mother that Justin will likely be able to outgrow the milk allergy. Justin is referred to a registered dietitian for an assessment of his growth and nutrition intake. His mother reports that he is able to feed himself and she has noticed no problems with chewing and swallowing. A 24-hour dietary recall shows Justin consumed the following foods:
Fortified soy milk (4 ounces), rice cereal, bananas, grilled soy-cheese sandwich, fortified soy milk (4 ounces), green beans, apricots, orange juice (8 ounces), apple slices, almond butter on toast, apple juice (8 ounces), roast turkey, baked potato, green peas, and fortified soy milk (4 ounces).
Date Weight Weight for age % Height Height for age % Weight for length %
12 months 23# a.____ 29" d.____ g.____
18 months 26# b.____ 31.5" e.____ h.____
24 months 29# c.____ 33.5" f.___ i.____
1) Complete the above table. Is Justin’s growth on track?
2) Does the diagnosis affect his nutritional needs? If so, how ?
Answer:
The correct answer is -
1. Based on height he is 50% and height he is 25%
2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.
Explanation:
By the reference of the chart of growth rate presented by CDC,
These informations can be found-
Weight :
A= 50%
B=50%
C=50-75%
Height :
D=10-25%
E=25%
F=25%
Then the percentage of height by weight ratio
Height by weight%:
G=75-90%
H=75-90%
I=75-90%
Thus, the correct answer is -
1. Based on height he is 50% and height he is 25%
2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.
which question would you ask the client to obtain some environmental history of the pet? a. what medications does your pet take b. how many pets are in the house hold? c. has your pet had any previous surgeries? d. is your pet up to date with vaccinations?
Answer: B
Explanation:
That question lets you know how the pet is living on a daily basis. The other answer choices ask about medical history, but B asks about environment.
Rainforests around the world are being cleared at an alarming rate to make room for new communities, agriculture, mining, and roads, and to provide lumber for construction and furniture. How might the destruction of rainforests affect the balance of gases in Earth's atmosphere?
by increasing carbon dioxide and decreasing oxygen
by increasing carbon dioxide and increasing oxygen
by decreasing carbon dioxide and increasing oxygen
by decreasing carbon dioxide and decreasing oxygen
Answer:
(1) by increasing carbon dioxide and decreases oxygen
The destruction of the rainforests will affect the balance of gases in Earth's atmosphere by increasing carbon dioxide and decreasing oxygen.
Rainforests, like the Amazon, are the world's greatest concentration of living trees. Through the process of photosynthesis, these trees contribute to the composition of the atmosphere that we enjoy every day and depend on to survive.
All trees perform photosynthesis, the fuel for this is carbon dioxide. This process then releases oxygen into the atmosphere as a by-product. For this reason, the destruction of the rainforests will affect the balance of gases in Earth's atmosphere by increasing carbon dioxide and decreasing oxygen.
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2. If a nucleus has 8 chromosomes, how many chromosomes will be present after Telophase I? 3. What advantage does crossing-over have in reproduction? 6. Compare and contrast spermatogenesis and oogenesis (where do they occur, how many gametes are formed, when do they develop, etc):
Answer:
Telophase I: 8 chromosomes composed of two sister chromatids
Crossing over refers to the mechanism of recombination, this process being characterized in that increases the genetic variation
Spermatogenesis refers to the mechanism of formation of male gametes (sperms), while oogenesis is the process of formation of female gametes (oocytes)
Explanation:
Telophase I is the final step in meiosis I. During telophase I, the nuclear membrane is formed around the decondensed set of chromosomes and the nucleoli reappear.
Spermatogenesis refers to the process by which haploid male germ cells (sperms) are generated within the seminiferous tubules in the testis, while oogenesis refers to the process of differentiation of the female egg cells (ova or oocytes) in the ovaries. Spermatogenesis is known to produce small and motile spermatic cells, while oogenesis is known to produce bigger non-motile oocytes.
what happens when liquid is heated? class five
Explanation:
when a liquid is heated it will break . The molecules there will be vibration of molecules and then they will loosen up(the molecules that is) and then there will be a lot of heat which will remain constant and then the heat will make the liquid to evaporate (which is known as boiling point)
If the regulator protein of the arginine regulon is mutated such that it can not bind arginine, which of the following describes the phenotype of the bacterium with such a mutation?
a) inducible
b) repressible
c) uninducible
d) constitutive
e) none of these
Answer:
The answer is a repressive mutation (the term is similar to b option).
Explanation:
In bacteria, the arginine regulon consists of a dozen genes required during the transport and biosynthesis of arginine (arg genes), these genes are controlled as a single unit. In prokaryotes, the concept of regulon is similar to the operon; however, an operon is composed of a group of genes linearly localized on bacterial chromosome, while a regulon can be formed by genes localized in different chromosome regions. Moreover, in eukaryotes, this concept is also used in order to indicate a set of linked genes that are regulated by the same regulatory gene sequence. A repressive mutation in a positive regulator of the arg regulon may trigger the inhibition of arg genes by affecting their ability to bind arginine.
Fast reproduction by binary fission enables bacteria to
cause infections in other organisms.
quickly modify their DNA to changing conditions.
change shape from coccus to bacillus.
transfer DNA from one cell to another.
Answer:
A.) Cause infections in other organisms
Explanation:
Binary fission helps the bacteria to cause infections in other organisms because of duplication of its genetic material.
Through fast reproduction in bacteria enables to cause infections in other organisms by binary fission.
How does binary fission help bacteria reproduce quickly?
During binary fission, the chromosome copies itself, forming two genetically identical copies. Then, the cell enlarges and divides into two new daughter cells.
The two daughter cells are just like the parent cell. Binary fission can happen very rapidly.
In the process of binary fission, an organism duplicates its genetic material, or desoxyribonucleic acid (DNA), then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.
Many prokaryotic organisms like bacteria reproduce by the method of binary fission.
Therefore, the correct option is A that bacteria cause infections in other organisms.
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Glycogen Synthase Kinase:_______.
A. Will only phosphorylate glycogen synthase (GS) after GS has been phosphorylated by casein kinase.
B. Phosphorylates glycogen phosphorylase
C. Phosphorlyates Casein Kinase.
D. Is activated by the insulin signaling pathway.
Answer:
A. Will only phosphorylate glycogen synthase (GS) after GS has been phosphorylated by casein kinase.
Explanation:
Glycogen synthase kinase (GSK) is a type of enzyme capable of phosphorylating serine and threonine residues on the glycogen synthase (GS). The insulin hormone activates the synthesis of glycogen by dephosphorylating GS, but it is a mechanism that depends on the previous phosphorylation of GS by Casein Kinase (CK). GSK is also known to phosphorylate the insulin receptor (IRS), and thus controlling glucose metabolism.
Which one of the following statements about secreted proteins is incorrect? Secreted proteins: are likely to have received N-linked glycosylation in the rough ER. are synthesized on membrane-bound ribosomes, not free cytosolic ribosomes. that are constitutively expressed are exported as they are prepared, as opposed to being released as a response to a signal. cannot be exported into the extracellular space until the vesicle they are in fuses with the plasma membrane. travel directly from the rough endoplasmic reticulum into the trans face of the Golgi Apparatus.
Answer:
they travel directly from the rough endoplasmic reticulum into the trans face of the golgi apparatus
Describe the biosynthetic pathway that produces catecholamines such as norepinephrine and epinephrine from amino acid precursors and explain how the lack of available amino acids precursors would impact homeostasis regulated by catecholamines.
Answer:
Tyrosine and phenylalanine are amino acids required for the synthesis of catecholamines
Explanation:
The catecholamines are hormones composed of a catechol ring group (benzene) and an amine lateral chain. One of the most common catecholamines is the neurotransmitter norepinephrine (noradrenaline). The biosynthesis pathway of the norepinephrine hormone includes the following steps: 1-tyrosine hydroxylase produces L-DOPA from tyrosine, 2-L-DOPA is subsequently tranformed into dopamine by the L-amino acid decarboxylase, and finally, 3-this chemical precursor is converted into norepinephrine by the action of the dopamine β-hydroxylase.
Phenylketonuria is a congenital metabolic disease associated with a decrease in the metabolism of phenylalanine (Phe), which is an amino acid residue that acts as a precursor of different catecholamines including dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline). Dietary restriction of tyrosine and phenylalanine is the most common treatment against phenylketonuria.
Since viruses are typically 20-200nm in diameter.. what is the best microscope to view them?
Answer:
electron microscope
Explanation:
Due to their extremely small size, the best microscope to view viruses would be the electron microscope.
The electron microscope has the capability to create resolved images of extremely small objects by utilizing electrons as a source of light instead of the visible light photon that is typical of light microscopes.
There are different two types of electron microscopes:
the scanning electron microscope, andthe transmission electron microscope.A typical scanning electron microscope creates an image of an object by detecting knock-off electrons from the object, whereas a transmission electron microscope uses electrons that pass through the object to create the image of the object.
The spread of cancer cells from one site to others in the body is known as _____.
Answer:
metastasis
Explanation:
Metastasis is the process in which cancer cells break away from the place where they first formed and travel through the bloodstream to other parts of the body where they form a new tumor.
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