During contraction of skeletal muscle fibers, the
a. contractile proteins shorten
b. thin filaments slide inward toward the A band's center as a result of cycles of cross-bridge binding and bending
c. thick and thin filaments become tightly coiled, thus shortening the sarcomere
d. I bands slide in between the A bands
e. lateral sacs of the sarcoplasmic reticulum shorten, pulling the Z lines closer together
B
You might also like to view...
The fingers are supplied with blood by the ________ arteries
A) deep palmar B) digital C) superficial palmar D) plantar E) dorsalis pedis
Firefly, a female quarter horse, had a ______________________ lump that was located above the shoulder blade
Fill in the blank(s) with correct word
Helper T cells secrete T-cell __________, which augments the activity of __________ T cells
Fill in the blank(s) with correct word
The most prevalent ions secreted by the tubules are:
a. sodium and chloride b. sodium and hydrogen c. sodium and potassium d. chloride and potassium e. hydrogen and potassium