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Arteries gradually constrict between each heartbeat. This would allow for which of the following?
A. Blood pressure would drop during a heartbeat.
B. Blood pressure would increase between heartbeats.
C. Blood flow would be temporarily blocked between heartbeats.
D. Blood volume would increase between heartbeats.

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Hagrid
The right answer for the question that is being asked and shown above is that: "C. Blood flow would be temporarily blocked between heartbeats."Arteries gradually constrict between each heartbeat. This would allow for blood flow would be temporarily blocked between heartbeats.

Answer:

The correct answer is option A, Blood pressure would drop during a heartbeat

Explanation:

When the arteries get constrict, the walls of arteries reduces  the space/volume  with in the arteries which causes blockage for a very minute time period. When the flow is blocked the blood pressure increases, while when the walls are released the pressure reduces but the flow increase.  

This process is also refered to as Vasoconstriction and it is a normal process which stabilizes the blood pressure.