Changes in blood flow to your fingertips may result from: sympathetic stimulatio

Question

Changes in blood flow to your fingertips may result from: sympathetic stimulation increasing contractile strength of the heart temperature extremes long-term changes in arteriole elasticity all of the above As a normal healthy individuals heart rate increases: the systolic and diastolic pressure increases: the increase of the systolic pressure is greater than the increase of the diastolic pressure the pulse pressure increases a and c but not b a, b and c In stimulation of skeletal muscle via nerve fibers, the frequency of neural stimulation was progressively increased but the voltage was kept constant. The results obtained would be expected to have exhibited. increasing tension temporal summation decreasing relaxation decreasing contraction a, b and c In the experiment on factors which alter the component of the muscle twitch form curve, which period would be expected to be least affected by decreasing temperature? latent period contractile period relaxation period all periods are equally affected contractile period and relaxation period are affected equally The effect of duration of stimulus pulse upon threshold stimulus voltage is best described by the following: decreased duration/decreased threshold voltage increased duration/increased threshold voltage increased duration/decreased threshold voltage increased duration/threshold voltage constant decreased duration/threshold voltage constant

Explanation / Answer

123) change in blood flow in fingertips results sympathetic stimulation increases contractile strength,decreases arteriole diameter,temperature extreams,long term change in arteriole elasticity.

124)The normal healthy individual heart rate increase means pulse rate is only increases.

126) The contractile and relaxation period are affected equally which alter the component of the muscle twitch form curve.

127)The affect of duration of stimulation of pulse upon threshold stimulus voltage is increased duration /increased threshold voltage

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