Neural mechanisms in the control of eating

Question 1

What is homeostasis?

Answer 1

• Maintaining constant internal environment

Question 2

what is the homeostasis cycle?

Answer 2

Eating leads to increase glucose, VMH turned off hunger, satiety feeling, stop eating, decrease glucose levels, LH activated, hunger starts, eating again

Question 3

What does the lateral hypothalamus (LH) do?

Answer 3

Activates hunger

Question 4

LH rat research found what?

Answer 4

1950’s rats damage caused aphagia (stopped eating) stimulate LH to east again “on switch”

Neurotransmitter Neuropeptide Y (NPY) kept eating instantly emit full and obese next days

Question 5

The ventromedial hypothalamus (VMH) does what?

Answer 5

Turns hunger off

Question 6

Damage to the VMH causes what?

Answer 6

hyperphagia (overeating)

Question 7

Gold said what in particular in VMH causes over eating?

Answer 7

in Paraventrievular nucleus (PVN) caused hyperphagia alone (gold)

Question 8

PVN does what in particular?

Answer 8

detects food needed and is responsible for cravings