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.
C
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A functional syncytium
a. is a pair of antagonistic muscles causing a joint to move in opposite directions b. is able to contract as a unit because action potentials move between adjacent cells through gap junctions c. is a functional junction between a smooth muscle fiber and an autonomic nerve ending d. is all of the above e. is none of the above
Which type of cell of the CNS is phagocytic?
A. Ependymal cells B. Satellite cells C. Oligodendrocytes D. Microglia
The long, thin extensions of the neuron cell body that transmit a nerve impulse are called ____________________
Fill in the blank(s) with correct word
The longest and heaviest bone in the body is the
A) humerus. B) femur. C) tibia. D) fibula. E) coxal bone.