Which of the following cranial nerves are involved in the movement of the extraocular muscles?
I, IV, and VII
V. and V
IV, and V
VIL and V
The Correct Answer is D
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a. Smooth: Correct. Smooth muscle cells in the walls of blood vessels regulate their diameter through contraction and relaxation.
b. Striated: Striated muscles, also known as skeletal muscles, are involved in voluntary movements and are not responsible for regulating blood vessel diameter.
c. Cardiac: Cardiac muscle is found in the heart and is responsible for pumping blood, not regulating blood vessel diameter.
d. Skeletal: Skeletal muscles control voluntary movements and are not involved in regulating blood vessel diameter.
Correct Answer is C
Explanation
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.
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