Bio 253 -Exam #3 Practice Questions And Answers With Latest Solutions
Course
Bio 253
Institution
Bio 253
asynchronous recruitment of skeletal muscle - slows the onset of fatigue
doubling the radius of a vessel will - increase the flow rate through the vessel by a factor of 16
blood in the venae cavae flows into the _____. - right atrium
capillary exchange is facilitated by - large surface area of c...
Bio 253 -Exam #3 Practice Questions
asynchronous recruitment of skeletal muscle - slows the onset of fatigue
doubling the radius of a vessel will - increase the flow rate through the vessel by a factor of 16
blood in the venae cavae flows into the _____. - right atrium
capillary exchange is facilitated by - large surface area of capillaries
which of the following could cause a pacemaker potential? - spontaneous opening of sodium
channels
creatine phosphate is an important source of skeletal muscle ATP because - it is catalyzed in the
presence of ADP to produce creatine and ATP
depolarization of the membrane caused by Na+ entering the cell when threshold is reached occurs -
in neurons, in contractile cardiac cells
diffusion in the capillaries is facilitated by - thin capillary walls
During skeletal muscle contractions, factor(s) that influence whole muscle tension are ____, _____, ____
- # of motor unit recruited, length of fiber at onset of contraction, frequency of stimulation
during smooth muscle contraction, Ca++ activates? - calmodulin
which of the following statements of the heart are true? - atria and ventricles go through separate
cycles of systole and diastole
during the ST segment ventricular pressure is ______ pressure in the arteries and atrial pressure is
_______ ventricular pressure, so blood flows _________. - Higher than, less than, into arteries
from ventricles
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