What is the function of ependymal cells?
A. They produce the myelin sheath around axons of the peripheral nervous system.
B. They are the phagocytes of the brain.
C. They support the cell bodies of neurons in peripheral ganglia.
D. They produce cerebrospinal fluid, and circulate it around the brain and spinal cord.
E. They produce the myelin sheath around axons of the central nervous system.
Answer: D
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Through which of the following does blood return to the heart from the lungs?
A. Pulmonary arteries B. Superior vena cava C. Coronary sinus D. Pulmonary veins E. Inferior vena cava
Intrapleural pressure ________ during expiration.
A. decreases B. remains unchanged C. increases
Which of the following is NOT a part of the horse?
a. fetlock c. poll b. shank d. pastern
Which blood vessels are known as exchange vessels?
a. arteries b. capillaries c. veins d. all of the listed responses are correct