How many layers of smooth muscle are generally found in the muscularis layer of the digestive tract wall (for example, in the wall of the small intestine)?
A. One
B. Two
C. Three
D. None
Answer: B
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The hormone(s) that may be slowly administered by intravenous drip to accelerate labor and delivery is/are
A) oxytocin. B) prolactin. C) luteinizing hormone. D) follicle stimulating hormone. E) both oxytocin and luteinizing hormone.
Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics
Indicate whether the statement is true or false
The chordae tendineae
keep the semilunar valves open. keep the AV valves from being pushed into the atria during ventricular systole. stimulate the SA node. are part of the internal conduction system of the heart.
Platelets release ________, a chemical vasoconstrictor that contributes to the vascular spasm
A) prostacyclin B) serotonin C) thrombin D) thromboplastin E) heparin