Nervous system 5

Question 1

What type of receptors are present on preganglionic neurons of the sympathetic nervous system?
a) Adrenergic
b) Muscarinic
c) Nicotinic
d) GABAergic

Answer 1

Nicotinic

Question 2

Which neurotransmitter is released from postganglionic fibers of the sympathetic nervous system?
a) Acetylcholine
b) Norepinephrine
c) Dopamine
d) Serotonin

Answer 2

Norepinephrine

Question 3

Which of the following receptors is activated by norepinephrine in the sympathetic nervous system?
a) Alpha and beta receptors
b) Muscarinic receptors
c) Nicotinic receptors
d) GABA receptor

Answer 3

Alpha and beta receptors

Question 4

Where do the cell bodies of the preganglionic neurons of the parasympathetic nervous system send out fibers from?
a) Thoracic and first 2-3 lumbar segments
b) Brainstem and sacral segments 2-4 of the spinal cord
c) Medulla oblongata and lumbar segments 5-12
d) Cervical and lumbar segments 1-5

Answer 4

Brainstem and sacral segments 2-4 of the spinal cord

Question 5

What is the primary neurotransmitter used by preganglionic and postganglionic neurons in the sympathetic nervous system?
a) Acetylcholine
b) Norepinephrine
c) Epinephrine
d) Dopamine

Answer 5

Acetylcholine

Question 6

What is the composition of the autonomic reflex arc?
a) Receptor, sensory neuron, motor neuron, effector
b) Receptor, motor neuron, effector, hormone
c) Receptor, sensory neuron, integrating centre, motor neuron, effector
d) Receptor, sensory neuron, hormone, motor neuron

Answer 6

Receptor, sensory neuron, integrating centre, motor neuron, effector

(This is same as spinal reflex arc, which is part of the CNS)

Question 7

Which part of the brain serves as the main integrating center for ANS reflexes?
a) Cerebellum
b) Medulla oblongata
c) Hypothalamus
d) Corpus callosum

Answer 7

Hypothalamus