Which of the following is not a known benefit of regular exercise?
A) Decreased incidence of hypertension
B) Prolonged life expectancy
C) Maintained endurance
D) Maintained strength
E) Maintained joint mobility
B
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Skeletal muscle contraction requires large amounts of energy in the form of ___________ in order to complete the sequence of cyclic events that lead to sarcomere shortening
Fill in the blank with correct word.
Using Figure 11.2, match the following:
1) Ion channel.
2) Synaptic vesicles.
3) Calcium ions.
4) Postsynaptic membrane.
5) Synaptic cleft.
The hip joint is an example of a __________.
a) biaxial joint b) multiaxial joint c) uniaxial joint d) triaxial joint
Tetanic muscle contractions don't occur in a normal cardiac muscle because
A) cardiac muscle tissue contracts on its own. B) neural stimulation is lacking. C) the refractory period lasts until the muscle relaxes. D) the refractory period ends before the muscle reaches peak tension. E) potassium channels outnumber sodium channels.