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inn [45]
3 years ago
13

Why do we get ill when we get stressed?

Biology
1 answer:
Alja [10]3 years ago
5 0
When your body is stressed you are constantly in the fight or flight mode. Your heart beat is higher, blood pressure is up and constant alertness is given full attention to your bodies defenses. Ther are a lot of flowing hormones to be able to use all of your strenght and more to survive. When this continues for long periods of time you dont sleep, eat and think properly and your body's immune system is weakened and you get sick easier.
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What happens to the orbit of Earth when the mass of the Sun is reduced to 75,000?
jok3333 [9.3K]
The answer i believe is d.

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3 0
3 years ago
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Explain what it means for a section of DNA to be considered a molecular clock. Be sure to discuss the importance of neutral muta
IceJOKER [234]
  <span>Neutral mutations are neither harmful nor beneficial. 

Therefore, they are invisible to natural selection. (Since they neither improve nor worsen one individual's chances of survival and reproduction over another.) 

However neutral mutations can still spread into the population by just random replications and matings. This is called genetic drift. 

In other words, they are 'silent'. They are mutations that exist and propagate in populations, but seem to have no effect at all. 

The reason they can become important to evolution is that a day can come when they *do* have an effect. In other words, even though an individual mutation may have no immediate effect on survival or reproduction, a *combination* of neutral mutations may provide some new benefit or harm ... at which point natural selection *will* act on that combination. 
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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
identify the subcellular structure of the neuron that forms the basis for the transmission of nerve impulses. (2 points) describ
melisa1 [442]

The subcellular structures of neuron that forms the basis for transmission of nerve impulses are the synaptic vesicles.

What are the steps in impulse transmission between neurons?

  • The action potential or nerve impulse reaches the <u>axon</u> of neuron and depolarises the membrane.
  • Voltage gated Calcium channels open .
  • Arrival of action potential causes the synaptic vesicle to attach to presynaptic membrane.
  • Calcium influx triggers release of neurotransmitter.
  • This neurotransmitters bind to postsynaptic membrane and new impulses are created.

Synaptic vesicle under resting condition:

  1. The neurotransmitter molecules are stored in synaptic vesicles.
  2. If the neurotransmitter leak from the vesicles, they are destroyed by enzymes.
  3. During resting condition, they are placed randomly.
  4. When an impulse reaches the axon, vesicles are arranged in the presynaptic membrane.

Thus from the above we can conclude that, synaptic vesicles are the subcellular structures in transmission of nerve impulses and , under resting condition they are placed randomly.

To know more about transmission of nerve impulses :

brainly.com/question/840056

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4 0
1 year ago
What is the tallest animal alive
Natalka [10]

Answer:

giraffe

Explanation:

3 0
3 years ago
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the steps of self pollination. In your own words, describe what happens in each step. pls give me 5 step in order
Mekhanik [1.2K]

Answer:

Steps are down below

Explanation

1. A small grain of pollen goes onto the stigma

2. Insects go into flowers and brush against the anther and is coated with pollen.

3. Pollen may fall onto the stigma of the next flower

4. Pollen falls onto the stigma of next flower

5. A small seed forms in the ovary of that plant

4 0
3 years ago
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