Q: Which equation best represents the neurotransmitter release at the adrenal medulla?

$$\text{Preganglionic neuron} \xrightarrow{\mathrm{ACh}} \text{Adrenal medulla} \xrightarrow{\text{Epinephrine, Norepinephrine}} \text{Bloodstream}$$

Question 1

Which of the following best describes the location of the sympathetic chain (paravertebral) ganglia?

Accepted Answer

Adjacent to the vertebral column on both sides, extending from the cervical to the sacral region.

Question 2

Which sympathetic ganglia are responsible for directing outflow to abdominopelvic organs?

Accepted Answer

Collateral (prevertebral) ganglia

Question 3

Which ganglia have short axons that release neurotransmitters directly into the bloodstream, resulting in a widespread sympathetic response?

Accepted Answer

Adrenal medullary ganglia

Question 4

Trace the sympathetic pathway from the spinal cord to a sweat gland on the back. Which sequence correctly describes the route?

Accepted Answer

Lateral horn of spinal cord → ventral root → spinal nerve → white ramus communicans → sympathetic chain ganglion → gray ramus communicans → dorsal ramus → sweat gland

Question 5

Which cranial nerve is primarily responsible for parasympathetic outflow to the visceral organs in the neck, thoracic cavity, and most of the abdominal cavity?

Accepted Answer

Vagus nerve (Cranial Nerve X)

Question 6

What is the other name for the parasympathetic division of the autonomic nervous system (ANS)?

Accepted Answer

Craniosacral division

Question 7

During which physiological states does the parasympathetic nervous system become most active?

Accepted Answer

Resting and digesting

Question 8

Where are parasympathetic terminal and intramural ganglia located?

Accepted Answer

Within or very close to the walls of target organs

Question 9

Which part of the parasympathetic division sends outflow to the pelvic organs?

Accepted Answer

Sacral spinal cord (S2-S4)

Question 10

A patient is experiencing increased heart rate and rapid breathing after a stressful event. Which division of the autonomic nervous system is primarily responsible for these changes?

Accepted Answer

Sympathetic division

Question 11

Which neurotransmitter is released by preganglionic neurons in both the sympathetic and parasympathetic divisions?

Accepted Answer

Acetylcholine ($$\mathrm{ACh})$$

Question 12

Which neurotransmitter is released by most postganglionic sympathetic neurons?

Accepted Answer

Norepinephrine ($$\mathrm{NE})$$

Question 13

Which of the following best describes the general response of the sympathetic division?

Accepted Answer

Widespread activation of multiple organ systems for 'fight or flight'

Question 14

Which pathway correctly traces the parasympathetic route from the spinal cord to the heart?

Accepted Answer

Brainstem → vagus nerve (CN X) → cardiac plexus → intramural ganglia in heart wall → heart muscle

Question 15

Which of the following is TRUE regarding the length of preganglionic and postganglionic axons in the sympathetic division?

Accepted Answer

Preganglionic axons are short; postganglionic axons are long.

Question 16

A patient is unable to digest food properly and has a low heart rate. Which division of the autonomic nervous system is likely underactive?

Accepted Answer

Parasympathetic division

Question 17

Which equation best represents the neurotransmitter release at the adrenal medulla?

Accepted Answer

$$	ext{Preganglionic neuron} \xrightarrow{\mathrm{ACh}} 	ext{Adrenal medulla} \xrightarrow{	ext{Epinephrine, Norepinephrine}} 	ext{Bloodstream}$$

Question 18

Which of the following best describes the effect of the sympathetic division on digestion and urination?

Accepted Answer

Inhibits digestion and urination

Question 19

A multi-step scenario: A person is startled by a loud noise, causing increased heart rate, sweating, and dilation of pupils. Which sequence of events best explains the sympathetic pathway to the heart?

Accepted Answer

Lateral horn of thoracic spinal cord → ventral root → spinal nerve → white ramus communicans → sympathetic chain ganglion → cardiac nerves → heart

Question 20

Which pathway correctly traces the parasympathetic route from the spinal cord to the stomach?

Accepted Answer

Brainstem → vagus nerve (CN X) → gastric plexus → intramural ganglia in stomach wall → stomach

Autonomic Nervous System: Sympathetic and Parasympathetic Divisions

Guida di studio - Domande di pratica

Study guide - Flashcard