To stimulate skeletal muscle contraction, acetylcholine must cross the _____ of the neuromuscular junction and bind to receptors on the motor endplate
a) node of Ranvier
b) synaptic cleft
c) sarcolemma
d) synaptic end bulb
e) transverse tubule
b
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Using Figure 12.3, match the following:
1) Site of efferent soma.
2) Site of axons and afferent neurons.
3) Site of sensory soma.
4) Gray commissure.
5) Horn usually containing interneurons.
6) Site containing central canal.
7) Multipolar neurons are common here.
Binding of ACh with receptor sites on the motor end plate opens chemical messenger-gated cation channels in the motor end plate, bringing about depolarization of the motor end plate
Indicate whether the statement is true or false
A microscopic examination that identifies the shape of the cells and platelets is a _______ .
A. Bone Marrow Biopsy B. CBC (Complete Blood Count) C. Blood Smear D. Endoscopy
Compared to the hand, the foot
A) has more phalanges. B) has fewer metatarsals than the hand has metacarpals. C) has a more restricted range of movement. D) contains arches that help distribute body weight. E) has the same number of tarsal bones as the hand has carpal bones.