How does the skeletal system aid the cardiovascular system?
A. Red bone marrow produces RBCs
B. Rib-cage protects the heart
C. Stores calcium needed for blood clotting
D. All apply.
Answer: D
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Pain fibers from the apex (tip) of the tongue travel in the ____________ nerve.
A. lingual B. hypoglossal C. chorda tympani D. glossopharyngeal E. inferior alveolar
Which of the following is false?
A. Melatonin makes us feel alert and awake. B. The pineal gland is found within the diencephalon of the brain. C. The pineal gland secretes melatonin in a cyclical fashion. D. The pineal gland forms part of the epithalamus.
Water-soluble vitamins include
A. vitamin A. B. vitamin C. C. vitamin D. D. vitamin K. E. vitamin E.
Normally, the systemic arterial blood has a Po2 of ________ mm Hg, a Pco2 of ________ mm Hg, and a pH of ________
A) 7.4; 40; 95 B) 40; 7.4; 95 C) 95; 40; 7.4 D) 95; 7.4; 40 E) 40; 95; 7.4