Answer:
Precapillary sphincters increase the flow of blood through a tissue when they relax.
<em>a)True</em>
Explanation:
Precapillary sphincters are rings of smooth muscle bands that surround the capillary opening. These structures help regulate blood flow and blood pressure. They respond to the body's needs and receive nerve and hormonal signals to relax or contract in consequence.
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Answer:
caused by a genetic defect on chromosome 4. The defect causes a part of DNA to occur many more times than it is supposed to. This defect is called a CAG repeat
Explanation:
i believe the answer is C