Which of the following terms identifies the point of contact between the nerve ending and the muscle fiber?
Insertion site
Origin site
Neuromuscular junction
interneuron
The Correct Answer is C
a: Insertion site - This refers to the attachment point of a muscle tendon to a bone, not the point of contact between nerve and muscle.
b: Origin site - This refers to the attachment point of a muscle tendon to a stationary bone, not the neuromuscular junction.
c. Neuromuscular junction: The neuromuscular junction is the specialized synapse between a motor neuron and a muscle fiber. It is where the nerve impulse is transmitted from the motor neuron to the muscle fiber, resulting in muscle contraction
d: Interneuron - Interneurons are neurons that transmit signals between other neurons; they are not directly involved in the neuromuscular junction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a. Pyloric sphincter: This sphincter regulates the passage of chyme from the stomach into the duodenum.
b. Lower esophageal sphincter: This sphincter prevents the backflow of stomach contents into the esophagus.
c. Ileocecal sphincter: This controls the flow of material from the ileum of the small intestine into the cecum of the large intestine.
d. Internal anal sphincter: This sphincter controls the release of feces from the rectum but is not involved in the release of chyme
Correct Answer is D
Explanation
a. I, IV, and VII: Cranial nerve I (Olfactory) is involved in the sense of smell, not eye movement. Cranial nerve VII (Facial) controls facial expressions, not eye movement. Cranial nerve IV (Trochlear) does control one of the extraocular muscles.
b. V and V: This is not a valid option, as it repeats the same cranial nerve. Cranial nerve V (Trigeminal) is involved in facial sensation and chewing, not eye movement.
c. IV and V: Cranial nerve IV (Trochlear) is involved in eye movement, but cranial nerve V (Trigeminal) is not.
d. III, IV, and VI: Correct. Cranial nerve III (Oculomotor), cranial nerve IV (Trochlear), and cranial nerve VI (Abducens) all control the extraocular muscles responsible for eye movements.
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