Deck 33: Autonomic Nervous System

Question 1

In the pupillary light reflex, light is sensed by

A) R od ce lls
B) C on e c ells
C) Bip ola r c ells
D) Intrin sica lly ph oto sen sitiv e retin al ga ng lion cells
E) Retinal pigmented epithelium

Answer 1

D

Question 2

Beta receptors are blocked by

A) Acetylcholine
B) Norepinephrine
C) Propanalol
D) Phenoxybenzamine
E) Atropine

Answer 2

C

Question 3

Br igh t ligh t in th e rig ht e ye

A) Reflexly shrinks the pu pil in the left eye
B) Sh ifts vis ion to th e ro ds in th e rig ht e ye
C) Reflexly shrinks the pu pil in the right eye
D) Sh ifts vis ion to th e c on es in th e le ft e ye
E) Both A and C are correct

Answer 3

A

Question 4

Pre-ganglionic sympathetic motor neurons are located mainly in the

A) M ed ulla
B) Pons
C) Th orac o-lum bar s pina l cord
D) Sacral spinal cord
E) A and C are correct

Question 5

Alpha adrene rgic receptors

A) Increase IP 3 in th e targ et ce lls
B) Increase c G M P in the tar ge t ce lls
C) Decreas es cG M P in the tar ge t ce lls
D) Increase c AM P in the tar ge t ce lls
E) Decreas e c AM P in the tar ge t ce lls

Question 6

Muscarinic receptors are blocked by

A) Acetylcholine
B) Norepinephrine
C) Propanalol
D) Phenoxybenzamine
E) Atropine

Question 7

Beta adrene rgic receptors

A) Incre ase IP3 in th e ta rg et c ells
B) Increase c G M P in the tar ge t ce lls
C) Decreas es cG M P in the tar ge t ce lls
D) Increase cAM P in the targ et ce lls
E) Decreas e c AM P in the tar ge t ce lls

Question 8

Constriction of the right pupil caused by light in the left eye is called the

A) Pupillary light reflex
B) Consensual pupillary light reflex
C) Edinger-W estphal reflex
D) Accom modation reflex
E) Bright light reflex

Question 9

Dilation of the pupil is mediated by

A) Parasympathetic output from the Edinger-Westphal nucleus
B) Sympathetic output from the superior celiac ganglion
C) Sym pathetic output from the va gus nerve
D) Parasym pathetic output from the va gus nerve
E) Sympathetic output from the inferior mesenteric ganglion

Question 10

Stretch of the urinary bladder

A) Relaxes the internal urinary sphincter muscle through parasympathetic fibers from T10-L2
B) Relaxes the internal but constricts the external urinary sphincter
C) Relaxes the inte rna l urin ary s ph inct er m us cle through parasympthetic fibers from S1- S3
D) Constricts the external urinary sphincter muscle by sympathetics from T10-L2
E) Constricts the detrusor muscle by sympathetics from T10-L2

Question 11

Which of the following is NOT true of the parasympathetic system?

A) It has s ho rt preg ang lionic fibe rs an d lon g po st ga ng lionic fibe rs
B) It uses acetylcholine at both preganglionic and postganglionic synapses
C) The m otor neurons originate in the cranial and sacral part of the central nervous system
D) The preganglionic receptors are nicotinic acetylcholine recep tors
E) The postganglionic receptors are ge nerally m uscarinic acetylcholine recep tors

Question 12

Contraction of the detrusor muscle is

A) Promoted by stretch receptors in the wall and inhibited by volitional control
B) Prom oted by stretch receptors in the wall and inhibited by sympathe tics in the pelvic nerve
C) Activated by stretch and inhibited by sympathetics in the hypogastric nerve
D) Entirely volitional
E) Stimulated by both sympathetic and parasympathetic systems

Question 13

Atropine blocks

A) Pre-ganglionic parasympathetic neurotransmission
B) Pre-ganglionic sympathetic neurotransmission
C) Post-ganglionic parasympathetic neurotransmission
D) Post-ganglionic sympathetic neurotransmission
E) Post-gagnlionic sympathetic neurotransmission only to sweat glands

Question 14

The ne ur otr an sm itter us ed by m os t po stg an glio nic fibe rs is

A) Aceytylcholine for sympa thetic fibers, norepineph rine for parasym pathetic fibers
B) No repin eph rine fo r sym path etic fibers , acetylch oline fo r paras ym path etic fibers
C) Acetylcholine for both sympathetic and pa rasym pathetic fibers
D) Norep inephrine for both symp athetic and parasym pathetic fibers
E) Dopa m ine for sympa thetic fibers and acetylcholine for parasym pathetic fibers

Question 15

Which of the following is NOT a prevertebral ganglion?

A) Celiac ganglion
B) Superior mesenteric ganglion
C) Inferior mesenteric ganglion
D) Adre na l me du lla
E) None of the above

Question 16

The part of the nervous system that prepares for emergency action is the

A) Enteric nervous system
B) Parasympathetic nervous system
C) Sympathetic nervous system
D) Brainstem
E) M ed ulla

Question 17

The part of the nervous system that promotes restoration of metabolic reserves is the

A) Enteric nervous system
B) Parasympathetic nervous system
C) Sympathetic nervous system
D) Brainstem
E) M ed ulla

Question 18

The ne ur otr an sm itter us ed by p re ga ng lion ic fib er s is

A) Aceytylcholine for sympa thetic fibers, norepineph rine for parasym pathetic fibers
B) Norep inephrine for sympa thetic fibers, acetylcholine for parasym pathetic fibers
C) Acetylch oline fo r both sym path etic an d pa rasym path etic fibers
D) Norep inephrine for both symp athetic and parasym pathetic fibers
E) Dopa m ine for sympa thetic fibers and acetylcholine for parasym pathetic fibers