The basic contractile unit of a skeletal muscle is the:

a. sarcomere
b. actin
c. myosin
d. Z-lines


a. sarcomere

Anatomy & Physiology

You might also like to view...

A muscle fiber exposed to a series of stimuli of increasing frequency combines individual twitches (summation) which results in

A. a latent period. B. complete sustained contraction. C. muscle tone. D. flaccid muscles.

Anatomy & Physiology

Antigens are foreign substances recognized by _____.

A) macrophages B) T cells C) B cells D) all of these

Anatomy & Physiology

Each complex in the electron transport chain collectively acts as a _____ pump that removes H+ from the mitochondrial matrix and pumps it into the space between the inner and outer mitochondrial membranes

A. proton B. electron C. neutron D. sodium-potassium E. calcium

Anatomy & Physiology

Memory B cells remember pathogens

Indicate whether the statement is true or false.

Anatomy & Physiology