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9. Muscle Tissue

Structure of a Skeletal Muscle

9. Muscle Tissue

Structure of a Skeletal Muscle

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Organization of Muscle Tissue

Organization of Muscle Tissue

Structure of a Skeletal Muscle Example 1

Structure of a Skeletal Muscle Example 1

The Muscle Fiber

The Muscle Fiber

Structure of a Skeletal Muscle Example 2

Structure of a Skeletal Muscle Example 2

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Skeletal Muscle

Skeletal Muscle

Medic Tutorials - Medicine and Language

Skeletal Muscle - Fibers and Fibrils

Skeletal Muscle - Fibers and Fibrils

Medic Tutorials - Medicine and Language

Skeletal Muscle Tissue

Skeletal Muscle Tissue

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Practice this topic

Multiple Choice

What layer of connective tissue surrounds and separates muscle fibers?

Has a video solution.

Multiple Choice

A fascicle is a bundle of:

Has a video solution.

Multiple Choice

The plasma membrane of a muscle fiber is called the ____________ and it wraps bundles of ____________.

Has a video solution.

Multiple Choice

True or False: if false, chose the answer that corrects the statement.

The smallest contractile unit of a muscle is the muscle cell.

Has a video solution.

Multiple Choice

Which type of skeletal muscle contains abundant quantities of glycogen?

Multiple Choice

An entire skeletal muscle is surrounded by __________.

Multiple Choice

Which of the following statements is INCORRECT?

Multiple Choice

Where does 95% of the energy needed for contraction come from during moderate exercise?

Textbook Question

The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is called the a. epimysium, b. perimysium, c. endomysium, d. periosteum.

Has a video solution.

Textbook Question

A fascicle is a a. muscle, b. bundle of muscle fibers enclosed by a connective tissue sheath, c. bundle of myofibrils, d. group of myofilaments.

Has a video solution.

Textbook Question

Thick and thin myofilaments have different compositions. For each descriptive phrase, indicate whether the filament is, a. thick or b. thin. _____ (1) contains actin _____ (2) contains ATPases _____ (3) attaches to the Z disc _____ (4) contains myosin _____ (5) contains troponin _____ (6) does not lie in the I band

Has a video solution.

Textbook Question

The function of the T tubules in muscle contraction is to a. make and store glycogen, b. release Ca²⁺ into the cell interior and then pick it up again, c. transmit the action potential deep into the muscle cells, d. form proteins.

Has a video solution.

Textbook Question

True or false: Most muscles contain a predominance of one skeletal muscle fiber type. Explain the reasoning behind your choice.

Has a video solution.

Textbook Question

The primary action of the biceps brachii muscle of the anterior arm is to flex the forearm at the elbow. However, when this muscle is inflamed, pain is felt in the shoulder. Explain this finding.

Has a video solution.

Textbook Question

Which of the following types of muscle fibers have low myosin ATPase activity and are classified as slow-twitch?

a. Type I fibers

b. Type IIa fibers

c. Type IIx fibers

d. Type III fibers

Has a video solution.

Textbook Question

Mr. Nasheed has cerebral palsy and suffers severe skeletal muscle spasms as a result of his condition. He is prescribed the drug dantrolene, which prevents the release of Ca2+ from the SR. Explain how this will treat his muscle spasms.

Has a video solution.

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