Transverse tubules
A. store sodium ions for the action potential at the cell surface.
B. store calcium ions.
C. connect actin and myosin.
D. transmit muscle impulses into the cell interior.
Answer: D
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Osteomyelitis is a bone disorder caused by ________.
A. endocrine system dysfunction B. a tumor C. trauma D. infection
About how many cells constitute the body of an adult?
A. 50 to 100 quadrillion B. 50 to 100 billion C. 50 to 100 million D. 50 to 100 trillion
Release of crossbridges and a decline in muscle tension characterize the _______ period of a twitch
A. contraction B. latent C. relaxation
A heart with cells contracting rapidly in a disorganized manner, with no effective pumping action, is said to be in ________.
Fill in the blank(s) with the appropriate word(s).