quiz 7 emesis

Question 1

vomiting is triggered by 4 types of stimuli

Answer 1

• irritation of tissues innervated by the vagus nerve (SI) - direct stimulation of vomiting center
• stimulation of the Chemoreceptor Trigger Zone (CRTZ)
• stimulation of the vestibular nerve
• stimulation of the cerebral cortex

Question 2

which 2 of the 4 types of stimuli are the most common cause of vomiting in animals?

Answer 2

• stimulation of the Chemoreceptor Trigger Zone (CRTZ)

- stimulation of the vestibular nerve

Question 3

this is the most common cause of vomiting

Answer 3

irritation in GI tract

Question 4

irritation in GI tract can be due to (anything interfering with)

Answer 4

visceral organs

- i.e. cat uterus, anything interfering with vagus nerve

Question 5

what are vagus nerves? which nervous system are they associated with?

Answer 5

PNS nerve fibers that signal to vomit

Question 6

substances in the ____ ____ can also stimulate receptors in the CNS

Answer 6

circulating blood

Question 7

any substance in the blood that isn’t supposed to be there can cause vomiting due to stimulating the
- example?

Answer 7

CRTZ

- kidney failure - not able to get rid of urea

Question 8

3 more things that can stimulate vomiting

Answer 8

• inner ear stimulation - motion sickness
• emotion
• serotonin and ACH

Question 9

motion sickness affects what in the inner ear?

Answer 9

vestibular apparatus