Question 1

Which of the following is required to detach myosin from actin?

Accepted Answer

A)  calcium
B)  ATP
C)  phosphate
D)  troponinE) B) and C)
F) B) and D)

Question 2

Impulses conducted along the transverse tubules of the muscle fiber stimulate

Accepted Answer

A)  the release of ATP.
B)  the binding of actin to the Z lines.
C)  tropomyosin and troponin binding.
D)  the release of calcium ions.E) A) and B)
F) A) and C)

Question 3

Select the incorrect statement about muscle and muscle fibers.

Accepted Answer

A)  Long distance runners tend to have more slow-twitch muscle fibers than fast-twitch fibers.
B)  A quick contraction and relaxation of an isolated skeletal muscle is called tetanus.
C)  Fast-twitch fibers have fewer capillaries and mitochondria than slow-twitch fibers.
D)  Slow-twitch muscle fibers have high concentrations of myoglobin.E) A) and C)
F) All of the above

Question 4

Shown below is an electron micrograph of part of a myofibril from a relaxed muscle fiber.Which of the labeled regions will NOT shorten when the muscle contracts?

Accepted Answer

A)  A band
B)  Sarcomere
C)  H band
D)  I bandE) B) and D)
F) B) and C)

Question 5

The human skeleton is a typical vertebrate

Accepted Answer

A)  exoskeleton.
B)  hydrostatic skeleton.
C)  axial skeleton only.
D)  endoskeleton.E) B) and C)
F) B) and D)

Exam 46: The Musculoskeletal System

Which of the following is required to detach myosin from actin?

Correct Answer
verified

Impulses conducted along the transverse tubules of the muscle fiber stimulate

Correct Answer
verified

Shown below is an electron micrograph of part of a myofibril from a relaxed muscle fiber.Which of the labeled regions will NOT shorten when the muscle contracts?

Correct Answer
verified

The human skeleton is a typical vertebrate

Correct Answer
verified

Select the incorrect statement about muscle and muscle fibers.

Correct Answer
verified

Exam 46: The Musculoskeletal System

Which of the following is required to detach myosin from actin?

Correct AnswerverifiedShow Answer

Impulses conducted along the transverse tubules of the muscle fiber stimulate

Correct AnswerverifiedShow Answer

Shown below is an electron micrograph of part of a myofibril from a relaxed muscle fiber.Which of the labeled regions will NOT shorten when the muscle contracts?

Correct AnswerverifiedShow Answer

The human skeleton is a typical vertebrate

Correct AnswerverifiedShow Answer

Select the incorrect statement about muscle and muscle fibers.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified