The fossa ovalis appears just above the opening of the coronary sinus within the
A. left atrium.
B. left ventricle.
C. right atrium.
D. right ventricle.
C
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When a blood vessel is injured, it releases chemicals that activate platelets and cause them to stick to the injury site. The activated platelets in turn release more chemicals and attract more platelets to the injury site until the wound is fully sealed. This process of blood clotting is an example of
A. feedforward regulation. B. acclimatization. C. adaptation. D. negative feedback. E. positive feedback.
How are the processes of reabsorption and secretion related?
A. They both involve movement of material from the blood into the tubular fluid. B. Materials move in opposite directions: reabsorption moves materials into the blood, whereas secretion removes them from the blood. C. Materials move in opposite directions: secretion moves materials into the blood, whereas reabsorption removes them from the blood. D. They both involve movement of material from the tubular fluid into the blood.
The lungs are located inferior to the diaphragm.?
Indicate whether the statement is true or false
A passageway connecting neighboring osteocytes in an osteon is a
A. lacuna. B. lamella. C. osteocanal. D. canaliculus. E. central canal.