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yuradex [85]
2 years ago
8

Scientists believe that all life originated in __________ roughly 4 million years ago.

Social Studies
2 answers:
kherson [118]2 years ago
8 0
It may be Africa?
I read it in history and just know about it(had to put 20 characters)
Xelga [282]2 years ago
7 0
D is the answer hope this helps
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Explanation:

Epinephrine and norepinephrine are neurotransmitters and they belong to a class of compounds called catecholamines.  While chemically both these neurotransmitters are very similar, they have different functions. Norepinephrine has an effect only on alpha receptors in your arteries, while epinephrine works of both alpha and beta receptors. Beta receptors are in the heart, lungs, and the arteries of the muscles in our skeletal system as well.  Both compounds also serve as hormones in the body and having either an overabundance or a deficiency of these compounds can affect your health.  Epinephrine can increase your heart rate and smooth out or relax the muscles of your breathing passages so you breathe better when experiencing a fight or flight response. Norepinephrine can constrict your blood vessels and increase blood pressure getting your body ready for action. It is also used to treat very low blood pressure.  

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4 years ago
Family impact on identity
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4 years ago
Can anyone of you guys help me with this <br><br>each question is one point
kodGreya [7K]

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hope this helps

Explanation:

20) c and a

21) b

22) a

23) c

24) a

25) stamp act

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3 years ago
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This case involves a federal death sentence imposed on defendant-appellant Fields for conviction of a federal capital offense. Fields was sentenced to death largely on the basis of the opinion of a psychiatrist who stated that he could confidently predict Fields would be dangerous in the future.

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3 years ago
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<em>Previewing, annotating (marking), reading with concentration, and reviewing</em>

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