When you swallow food, why does it NOT usually enter the respiratory system?
A. The Heimlich maneuver prevents it from doing so.
B. The bronchioles produce mucus.
C. The diaphragm contracts.
D. The epiglottis covers the opening to the respiratory system.
E. The vocal cords block the opening to the respiratory system.
Ans: E. The vocal cords block the opening to the respiratory system.
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The function of the coronary sinus is to
A. connect the top and bottom halves of the heart. B. guide the aorta out of the heart. C. guide the inferior vena cava into the right atrium. D. take blood from the coronary circulation to the right atrium. E. shunt blood from the right atrium to the left atrium.
The function of an osteoclast in osseous tissue is ________.
A) to produce new bone matrix B) to dissolve old bone matrix and release amino acids and the stored calcium and phosphate C) to secrete the organic components of the matrix D) to produce new osteoblasts E) None of the answers are correct.
Which is not among the bones in the proximal row of carpals?
A. Trapezoid B. Lunate C. Triquetrum D. Scaphoid E. Pisiform
What lymphoid organ stores platelets and acts as a blood reservoir?
A) thymus B) spleen C) appendix D) tonsils E) Peyer's patches