Reticular formation Qs

 

                            Reticular formation

1. Reticular activating system is a

a. Monosynaptic pathway

b.disynaptic pathway

C.polysynaptic pathway

Ans: c [Ganong 26^th ed, pg267]

2. Serotonin secreted by the Raphenuclei fibers at the spinal cord has the ability to ---------.

Ans: Suppress pain [Guyton 11^th 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 12^th 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 12^th ed, pg 673]

5. Medullary reticulo spinal tract transmit -------------signals to antigravity anterior motor neuron.

Ans: inhibitory. [Guyton and Hall 12^th 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 11^th 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 11^th 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 22^nd 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].