Neural Regulation of Gastrointestinal Function

Question 1

What neurotransmitters are used for taste sensation?

Answer 1

ATP
Serotonin
Noradrenaline

Question 2

What receptors do sweet/bitter/umami use?

Answer 2

G protein coupled receptors

Question 3

What receptors do salty and sour use?

Answer 3

TRPM5 Ca2+-activated Na/K channel (transient receptor potential cation channel M5

Question 4

What is the innervation of the tongue?

Answer 4

Front portion: CN 7

Back portion: CN 9

Question 5

What does sympathetic stimulation cause in salivary secretions?

Answer 5

Thick mucous

Question 6

What nerves are responsible for the swallowing reflex?

Answer 6

CN 9

CN 10

Question 7

What affect do stretch receptors have on G cells?

Answer 7

Cause release of gastrin stimulating Chief and parietal cells

Question 8

What role does the vagus play in stimulation of G cells?

Answer 8

Releases gastrin releasing peptide on G cells

Question 9

What does too much gastric acid cause?

Answer 9

Release of Somatostatin to inhibit G cells

Question 10

What is the affect of CCK on vagal fibers?

Answer 10

Causes an increase in Ach release