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weqwewe [10]
3 years ago
6

What are the roles of the parasympathetic nervous system and sympathetic nervous system in maintaining everyday homeostasis?

Biology
1 answer:
gtnhenbr [62]3 years ago
7 0

Answer: The parasympathetic nervous system and sympathetic nervous system play opposite roles

Explanation:

To ensure a stable internal environment (homeostasis) is achieved, the parasympathetic nervous system (PNS) and sympathetic nervous system (SNS) play OPPOSITE roles.

The PNS dominate during relaxed periods and stimulates the

- liver to break down glycogen

- constriction of bladder to pass out urine

- increases heartbeat

- dilate pupils etc

The SNS, in contrast dominate in times of emergency or stressful periods and do the EXACT opposite of the processes mentioned above.

Thus homeostasis is maintained

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Describe the structure of bird eggs and explain what usually happens to the eggs after they are laid
Vladimir79 [104]

Answer

They have polygenic inheritance and are also affected by the environment factor.

Explanation

The trait of height and skin tone are controlled by different genes and are also affected by environmental factors. The skin tone and height within the population is not specific, both have wide ranges varies from high expression of the gene to less or even no expression of the gene. Mostly these factors are mostly affected by inheritance and less by environmental factors.

3 0
3 years ago
Which of the following is a requirement for a population to be in Hardy-Weinberg equilibrium?
skelet666 [1.2K]

I think the answer is B. Immigration must outpace emigration. Hope this helps!

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3 years ago
) You treat some cells with a proteolytic enzyme that is too large to penetrate the cell membrane (Set 1). Another group of cell
Advocard [28]

Answer:

Proten W

Explanation:

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When treated with proteolytic enzymes, proteins are cut and become short fragment. This means that the fragments formed after the use of proteolytic enzymes, will move faster and thus, migrate a longer distance. Proteolytic enzymes in Set 2 cells will act only on plasma membrane proteins (because they cannot penetrate), while in Set 2 they will act on both, plasma membrane and interior proteins. Control group will have only the large fragments (not treated with enzyme).

Protein W travels the same distance on a gel of proteins from Set 1 and Set 2, but different than control group. It means that the proteolytic enzyme worked the same on Set 1 and Set 2.

3 0
3 years ago
What is the difference between natural selection and artificial selection?
sweet [91]

Natural selection is a process of adaptation by an organism to the changing environment by bringing selective changes to its genotype or genetic composition.

Artificial selection, also called selective breeding, is the process where humans identify desirable traits in animals and plants and use these traits to develop desirable phenotypic traits by breeding.

Some examples of natural selection include the selection of long-necked giraffes and the changes in the size and shape of beaks of birds according to their feeding habits.

Some examples of artificial selection include dog breeding to produce new breeds of dogs and cross-breeding in cash crops like wheat and rice.

8 0
3 years ago
How many pre molars do a person have
creativ13 [48]
When speaking about pre-molars, we would only contain 8 pre-molars, and this is due because we only contain 32 teeth.

We have : (8 pre-molars)

We have : (12 molars)

We have : (8 incisors)

And for the last part, we would contain : (4 canines).
8 0
3 years ago
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