Which of the following would decrease mean arterial pressure?
A) increase in total peripheral resistance
B) increase in arteriole diameter
C) increase in heart rate
D) increase in venous return
E) increase in stroke volume
Answer: B) increase in arteriole diameter
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Beta-oxidation of fatty acids does not produce:
A. acetyl-CoA. B. high-energy electrons transferred to NAD+. C. high-energy electrons transferred to FADH. D. ATP.
Answer the following statements true (T) or false (F)
1. The same hormone can cause vasoconstriction in some arterioles and vasodilation in others. 2. Cardiac output depends solely on the heart rate. 3. Rises in blood pressure with large increases in cardiac output are limited by decreases in total peripheral resistance. 4. A reduction in blood pressure due to hemorrhage would be expected to increase stimulation of baroreceptors.
A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies
covalently linked to fluorescent dyes (antibodies to mouse proteins--green; antibodies to human proteins--red). Forty minutes later, the researcher looked at the fused cell and observed ____.
a. the cell was still half red and half green. b. the red and green fluorescent labels were uniformly distributed across the entire membrane c. the red and green labels were distributed in intermingled patches d. the red and green labels flashed intermittently e. the red and green labels were distributed in a swirling pattern
What is the function of phloem?
a. it helps the plant prevent desiccation b. it carries water and minerals c. it carries photosynthetic sugars d. it allows for gas exchange e. it does more than one of these