Physiology Practice Test - Lecture Exam 2 Module 13

1. How does the CNS connect to muscle fibers?
a. Lower motor neurons
i. Somatic motor neurons emanate from the brainstem and spinal cord to
innervates skeletal muscle
ii. Final common pathway
2. What are the four sources of input in the lower motor neurons?
a. Local circuit neurons
i. Nearby interneuron
b. Upper motor neurons
i. Cells bodies in the copper part of CNA brain stem
c. Basal nuclei
i. Provide input to upper motor neurons via the thalamus
d. Cerebellum
i. Provide input to upper motor neurons
ii. Monitor intended movement vs actual movement
3. What is the order of sources of input for regulation?
a. Local circuit neurons
b. Upper motor neurons
c. Basal nuclei
d. Cerebellum
4. What are the somatic reflexes?
a. Faast involuntary contractions of skeletal muscles
b. Same every times
c. Protection from injury due to noxious stimuli or keep up right
5. What is the reflex arc?
a. Sensory receptor
b. Sensory neuron
c. Integration center
d. Motor neuron
e. Effector
6. What is a stretch reflex?
a. Myotatic
b. Keeps us upright and posture
c. The only monosynaptic reflex
i. No interneuron direct synapse to motor neuron
d. Ipsilateral
7. What is tendon reflex?
a. Prevents excessive tension in skeletal muscle
b. Polysynaptic (excitatory and inhibitory) and ipsilateral
8. What are the sensory receptors for tendon reflex?
a. Golgi tendon organs
9. What is the flexor withdrawal reflex?
a. Withdrawal of limb from noxious stimulus
b. Polysynaptic and ipsilateral