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Exam 10: Muscle Tissue and Organization

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Question 31

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With increased age,skeletal muscles show

A) a decrease in the number of myofibrils.
B) an increase in muscle fiber diameter.
C) no change in oxygen storage capability.
D) increased glycogen reserves.
E) a tendency to fatigue less rapidly.

F) A) and D)
G) D) and E)

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Question 32

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The smallest sized member of a group of muscles may have ____________ as part of its name.

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Question 33

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The fascicles of a pennate muscle are at an oblique angle to the tendon.

When a muscle is isometrically contracted,its length _______ change.

The junction between an axon and the muscle fiber itself is called a _____________ junction.

During skeletal muscle fiber contraction,the I bands and H zones narrow.

The tension produced by a muscle fiber is directly proportional to the number of sarcomeres it contains.

A muscle whose name has "orbicularis" in it is _______ in appearance.

A sphincter has

The embryonic-like cells that remain in adult skeletal muscle tissue are known as satellite cells.

The fat and connective tissue that encircle a beef steak form the endomysium.

Skeletal muscle helps regulate body temperature.

Parallel muscles exhibit great strength but little endurance.

In addition to the thin filaments in I bands,there are protein filaments called ____________ that play a role in muscle elasticity.

Smooth muscle tissue is found in the organs of the digestive tract,the walls of blood vessels,and the iris.

A(n)_____________ is a muscle whose actions oppose those of the agonist.

In the hierarchy of skeletal muscle fiber components,the myofibril is made up of myofilaments.

The biceps brachii is an example of a ________ muscle.

The ability of a contracted muscle to recoil to its resting length when the applied tension is removed is called _______________.

When muscle tension is greater than the resistance (weight) ,movement ______ occur.