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Helen [10]
3 years ago
9

What hormone functions both as a flight or fight response and as a neruotransmitter, sending messages from one neuron to the oth

er?
Biology
1 answer:
zimovet [89]3 years ago
7 0

the hormone that functions both as a fight or flight response and a neurotransmitter is epinephrine

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Plants take in the sun's energy by absorbing Select one: a. high-energy sugars. b. chlorophyll a. c. chlorophyll b. d. sunlight.
Sidana [21]

Answer:

the answer is D

Explanation:

the molecules of chlorophyll absorb the sun's energy in form if light

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You are attempting to see if a suspect is associated with a crime. The only evidence you have is a tiny drop of blood from the c
kykrilka [37]

Answer:

There are no options in this question but generally a sample of DNA can be increased;

By using Polymerase Chain Reaction (PCR) technique.

Explanation:

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What form do we use to write hypotheses?
ra1l [238]
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Once a neuron is stimulated and the membrane potential is depolarized, the depolarized axonal membrane is helped to return to it
Vadim26 [7]

Answer:

Explanation:

The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.

The potential difference arises when the membrane is selectively permeable to some ions. The resting potential is -70mV.  

When the neurons get excited, the sodium ions start to enter by sodium channels.  

Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.

When the inside environment of the cell is more positively charged, the potassium ions start to move out of the cell. It goes out by the voltage-gated channels. Thus resting stage is maintained and it is known as repolarization.

But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.

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3 years ago
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