Reticular formation
1. Reticular activating system is a
a. Monosynaptic pathway
b.disynaptic pathway
C.polysynaptic pathway
Ans:
c
[Ganong 26th ed, pg267]
2. Serotonin secreted by the Raphenuclei fibers at
the spinal cord has the ability to ---------.
Ans:
Suppress pain [Guyton 11th ed, pg731]
3. Pontine Reticulo spinal tract receive excitatory
signals from vestibular nuclei and deep nuclei of cerebellum. [True/False]
Ans:
True. [Guyton and Hall 12th ed, pg673]
4. Which of the following statements regarding
pontine reticulo spinal tract is false?
a. transmit excitatory signals to antigravity
muscles
b.terminate on the medial anterior motor neuron
C.have a high degree of natural excitability
d.transmit inhibitory signals to antigravity muscles
Ans:
d. [Guyton and Hall 12th ed, pg 673]
5. Medullary reticulo spinal tract transmit
-------------signals to antigravity anterior motor neuron.
Ans:
inhibitory. [Guyton and Hall 12th ed, pg 674]
6. Which of the following neurotransmitters is
mainly secreted by locus ceruleus?
a. Dopamine
b.serotonin
c.norepinephrine
d.histamine
Ans:
c.
[Guyton 11th ed, pg 730]
7. Feedback signals from cerebral cortex to
excitatory reticuloformation maintain
a. +ve feedback
b. -ve feedback
c. feed forward control
d.adaptive control
Ans:
a
[Guyton 11th ed, pg729]
8. Reticular neurons are capable of transmitting
spontaneous impulses sweeping through the thalamus at a rate of about
------------during wakefulness.
Ans:
8-12c/s. [Ganong 22nd ed, pg198]
9. Small neurons of reticular formation are called
a.Raphe nucleus
b.Magnocellula neurons
c.locus ceruleus
d.Parvocelluar neurons
Ans:
d. [Indu khurana, pg1104]
10. Visceral regulatory centers are an integral part
of reticular formation. True/false
Ans:
True [Indu khurana, pg 1106].
