Cardiac output is:
a. the volume of blood pumped from both ventricles per minute
b. the volume of blood pumped from one ventricle per minute
c. about 5 liters in the average adult
d. both B and C above
d. both B and C above
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Leg muscles are predominantly composed of which type of muscle fiber?
a) slow oxidative b) fast glycolytic c) fast oxidative-glycolytic d) slow glycolytic e) fast oxidative
Which of the following statements concerning gap junctions is incorrect?
a. gap junctions are communicating junctions. b. at a gap junction, filaments of unknown composition extend between the plasma membranes of two closely adjacent but not touching cells, acting as "spot rivets" to anchor the cells together. c. gap junctions are formed by small connecting tunnels that link two adjacent cells and permit exchange of small water-soluble particles between the cells. d. gap junctions play an important role in transmission of electrical activity throughout an entire muscle mass. e. connexons are an important structural component of gap junctions.
Hyperventilation leads to respiratory alkalosis.
Answer the following statement true (T) or false (F)
Blood lactate will begin to rise when exercise is performed at a rate that is ________.
A. 50% of VO2max B. 85% of VO2max C. 15% of VO2max D. 25% of VO2max