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Which of the following is not a purpose of the excess postexercise oxygen consumption in muscle?
To neutralize carbon dioxode buildup
Which of the following is very important for muscle to continue contraction during anaerobic respirations?
If one nerve stimulus arrives at a muscle fiber so soon that the fiber has only partially relaxed from the previous twitch, the most likely result will be
Which of the following is true concerning isotonic eccentric contraction?
The muscle lengthens but tension remains constant.
To stimulate muscle contraction, acetylcholine is released from the______into the synaptic cleft.
The absence or inhibition of acetylcholinesterase at a synapse would lead to which of the following?
The process of bringing more motor units into use during a muscle contractions is called....
Athletes who train at high altitudes increase their red blood cell count and thus increase their oxygen supply during exercise. Increased oxygen supply results in
longer aerobic respirations.
As you are lifting a box, someone places extra weight on top of it. For your muscle to continue contracting and lifting the box, the muscle must....
recruit more muscle fibers.
Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. These drugs....
prevent calcium from entering smooth muscle, thus allowing the muscle to relax.
Dystrophin, the protein that is defective in muscular dystrophy, is normally found..
between the outermost myofilaments and the sarcolemma.
A reason that muscle twitches become progressively stronger in treppe is
CA 2+ accumulates in the sarcoplasm faster than the sarcoplasmic reticulum can reabsorb.
The purpose of variscosities in motor nerve fibers in muscle physiology is...
to release neurotransmitter onto smooth muscle cells.
Which of the following individuals would have more mitochondria in her skeletal muscle?
a 22 year old football player
The bladder's ability to greatly distend and return to normal tension is due to the____of smooth muscles.
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