The pectoralis major extends the arm, whereas the latissimus dorsi flexes it.
Answer the following statement true (T) or false (F)
False
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A dark pigment in skeletal muscle fibers that stores oxygen is __________.
Fill in the blank(s) with the appropriate word(s).
Bones of the skull that articulate with the nasal bones include (the)
A) temporal bone. B) ethmoid bone. C) zygomatic bone. D) sphenoid. E) maxillary bone.
The relative refractory period occurs after the action potential is complete because of the
a. lingering inactivation of the voltage-gated Na+ channels. b. slowness of the voltage-gated channels. c. the sodium-potassium pump. d. both (a) and (b). e. both (b) and (c).
In order for muscle relaxation to occur,
A. calcium ions must be transported to troponin. B. power strokes slow down. C. the active sites on actin must be blocked. D. sodium ions must be actively transported to troponin. E. the active sites on myosin must be uncovered.