What is the substance in tea that binds iron, reducing the amount absorbed?
A. Caffeine
B. Ascorbic acid
C. Tannic acid
D. Folic acid
Answer: C
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Which of the following hormones is NOT usually secreted at higher levels in response to stress?
A. Vasopressin B. Aldosterone C. Antidiuretic hormone (ADH) D. Gonadotropins E. Beta-endorphin
There are two brachiocephalic veins and ________ brachiocephalic artery (or arteries)
A) no B) 1 C) 2
Sequence the following events involved in muscle cell contraction:
1 . Sodium channels open and sodium flows in. 2 . Impulse reaches the axon's terminal. 3 . ACh binds to receptors on the muscle cell membrane. 4 . Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis. 5 . If enough sodium moves in to the muscle cell, an impulse (action potential) develops. a. 1, 2, 3, 4, 5 b. 2, 1, 3, 4, 5 c. 2, 4, 3, 1, 5 d. 3, 4, 5, 1, 2 e. 3, 5, 2, 1, 4
The purpose of the fluid in the pleural cavity is to __________.
a. provide lubrication for diaphragmatic constriction b. allow for the exchange of electrolytes during respiratory movements c. reduce friction between the parietal and visceral pleura d. provide a medium for the exchange of O2 and CO2