Which of the following assists in moving venous blood back to the heart?
a. contraction of skeletal muscles
b. one-way valves in the veins
c. the changing pressure in the chest caused by breathing
d. all of the above
d. all of the above
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Angiogenesis
A. is a momentary chemical control of local blood flow. B. involves muscular constriction of arterioles to alter local perfusion. C. allows for an increase in the perfusion of a local tissue. D. involves building new muscle tissue and decreasing the amount of blood vessels in a region.
What is the purpose of the distilled water sample in each of the chemical tests in this exercise?
What will be an ideal response?
Planning, motivation, and social judgment are functions of the brain associated with which part of the cerebrum?
A. Frontal lobe B. Parietal lobe C. Occipital lobe D. Insula E. Temporal lobe
What is the function of a gland?
A. To secrete hormones B. To target certain tissues C. To produce hormones D. All of the answers are correct.