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Exam 10: Muscle Tissue and Organization

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Question 1

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Which sequence correctly lists the changes that allow the thick and thin filaments to slide past one another in skeletal muscle contraction?

A) Attach - pivot - detach - return
B) Pivot - attach - return - detach
C) Attach - detach - pivot - return
D) Return - pivot - attach - detach
E) Pivot - attach - detach - return

F) A) and B)
G) A) and C)

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Question 2

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Which contraction occurs when you try (unsuccessfully) to move a wall?

A) Isometric
B) Isotonic

C) A) and B)
D) undefined

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Question 3

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On a muscle fiber,the two terminal cisternae and the centrally placed T-tubule form a structure called a ______________.

The type of muscle fibers that have only a single nucleus,both thick and thin filaments,but no Z discs,are

Each skeletal muscle is composed of _____________,which are bundles of muscle fibers.

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.

A first-class lever has its fulcrum between the force and the resistance.

In the resting stage,a muscle with the word "rectus" in its name has straight fascicles.

Which of the myofilaments of a muscle fiber has the active sites to which the heads of the thick filaments will bind?

During an ________ contraction,the length of the muscle does not change.

In the human body,the synovial joint between two bones always serves as the fulcrum of the lever.

Which are possible functions of skeletal muscles? A: Maintenance of posture B: Both highly coordinated and localized simple movements C: Temperature regulation D: Support of certain body organs E: Restricting the movement of material through certain body tracts

A muscle whose name has "profundus" in it is located

A fan-shaped muscle that exerts a point-focused contraction force is a _______________ muscle.

Which is not a protein found in thin filaments?

The plasma membrane of a skeletal muscle fiber is called the ______________.

A sarcomere is defined as the distance from one _____ to the next.

The calcium ions involved in skeletal muscle contraction bind to a(n) ______ subunit.

A circular muscle band that contracts at an orifice is also known as a _______________.

The type of lever with the fulcrum in the middle is a ________ lever.