Which of the following does NOT contribute to increased stroke volume during exercise?
A. Increased venous return
B. Increased sympathetic stimulation of ventricular muscle
C. Increased end-diastolic volume
D. Increased contractility of cardiac muscle
E. Increased length of filling time during diastole
Answer: E
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Capillary colloid osmotic pressure created by _________ tends to _______.
A. blood volume; push fluids out of the capillary B. nondiffusable plasma proteins; draw fluids into the capillary C. interstitial fluid; draw fluids out of the capillary D. proteins in the interstitial fluid; push fluids into the interstitial fluid
Acetylcholine will cause the pupil of the eye to constrict. A drug acts on receptors for acetylcholine to cause the pupils of the eye to dilate. Nicotine does not bind to receptors in smooth muscle cells of the iris. Therefore, the drug which causes the pupils to dilate is a ________.
A. an adrenergic agent B. a muscarinic agent C. muscarinic blocking agent D. a nicotinic agent E. nicotinic blocking agent
Tim suffers from emphysema and therefore more at risk of developing which acid/base imbalance?
a. Respiratory acidosis b. Metabolic alkalosis c. Metabolic acidosis d. Respiratory alkalosis
Temporal summation on a postsynaptic neuron would occur when
a. a single presynaptic input causes two EPSPs to develop in rapid succession b. an EPSP and an IPSP occur simultaneously and cancel each other out c. two EPSPs develop simultaneously from different presynaptic inputs d. two action potentials from two presynaptic inputs causes two action potentials to develop e. none of the above take place