Answer:
D
Explanation:
I am just guessing so please don't hurt me!
Have a great day:)
<span> A. It is controlled by the brain. B. It is an involuntary response to a stimulus. C. It is a voluntary contraction of muscles. D. It increases blood flow to muscles.
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I think it’s d! makes sense
Answer:
The maintenance of stable, constant, internal conditions is called homeostasis. Your cells do this by regulating their internal environments so that they are different from the external environments. ... Controlling how much of which molecules enter or leave a cell allows cells to function properly. (from google)
Explanation:
hope this helps! :)
The reactivity of an atom is due to the number and arrangement of Electrons (b) in the outer energy level.
Electrons "bond" they're the ones that react to create other elements.
Examples: Salt (NaCl) Carbon Dioxide (CO2)
And so on, and so forth. Thus, your answer....B.