The mechanism of contraction in smooth muscle is different from skeletal muscle in that ________.
A) actin and myosin interact by the sliding filament mechanism
B) the trigger for contraction is a rise in intracellular calcium
C) the site of calcium regulation differs
D) ATP energizes the sliding process
C) the site of calcium regulation differs
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What type of synapse does number 2 indicate?
A. Dendrosomatic B. Axosomatic C. Axodendritic D. Dendrodendritic E. Axoaxonic
One of the components of sweat is the nitrogenous waste urea.
Answer the following statement true (T) or false (F)
Activation of parasympathetic fibers in pelvic splanchnic nerves leads to
A. decreased smooth muscle motility in the digestive tract. B. no effect on the digestive tract. C. increased smooth muscle motility in the digestive tract.
Even after a forceful expiration, air still remains in the lungs for gas exchange to continue. This volume is about ________
A) 500 mL B) 1200 mL C) 2100 mL D) 4800 mL E) 6000 mL