Question

all capillary beds in the body are open all the time. a true b false

Explanation:

Capillary beds are not all open at the same time. The body regulates blood flow to different capillary beds based on the needs of tissues and organs. For example, during exercise, more blood is directed to the capillary beds in muscles, while less blood may be in capillary beds of digestive organs (as the body prioritizes oxygen and nutrient delivery to working muscles).

Answer:

B. False