When a skeletal muscle fiber contracts, which of the following does not occur?

A) The H bands and I bands get smaller.
B) The zones of overlap get larger.
C) The Z lines get closer together.
D) The width of the A band remains constant.
E) Myosin and actin filaments decrease in length.


Answer: E

Anatomy & Physiology

You might also like to view...

Bacteria in the large intestine

A. produce vitamins. B. break down some undigested food. C. produce gas. D. All apply.

Anatomy & Physiology

What part of the eye has the greatest visual acuity?

A) optic disc B) blind spot C) ciliary body D) vitreous humor E) fovea centralis

Anatomy & Physiology

The delicate connective tissue that surrounds the skeletal muscle fibers and ties adjacent muscle fibers together is the

A) Endomysium. B) Perimysium. C) Epimysium. D) Superficial fascia. E) Periosteum.

Anatomy & Physiology

Antibodies are:

A) foreign substances to the body B) formed against one's own cells C) immunoglobulins D) antigens

Anatomy & Physiology