Lecture 25 - MC

Question 1

What is the role of leptin in energy homeostasis?
A) It promotes hunger when fat cells grow.
B) It signals energy abundance to the hypothalamus, activating the catabolic pathway.
C) It decreases energy expenditure and promotes fat storage.
D) It is released from the skeletal muscle to increase metabolism.

Answer 1

B

Question 2

What happens during a negative energy balance?
A) Circulating leptin levels increase, promoting satiety.
B) The hypothalamus activates the anabolic centre, increasing hunger and reducing energy expenditure.
C) Adipose tissue releases more catecholamines to increase metabolism.
D) Ghrelin levels decrease significantly, suppressing appetite.

Answer 2

B

Question 3

Which hormones are involved in regulating food intake on a meal-to-meal basis?
A) Leptin and insulin
B) Ghrelin and cholecystokinin (CCK)
C) Cortisol and adrenaline
D) Thyroxine and melatonin

Answer 3

B

Question 4

What is the consequence of glycemia falling below 3 mmol/L?
A) Euphoria
B) Hypoglycemia
C) Hyperglycemia
D) Thermogenesis

Answer 4

B

Question 5

Which of the following best describes the role of adipose tissue in relation to glucose?
A) It stores excess glucose as glycogen.
B) It releases insulin to decrease blood glucose levels.
C) It stores excess glucose as fat when liver and muscle glycogen stores are full.
D) It converts glucose directly into energy without storing it.

Answer 5

C

Question 6

What effect does a palatable dessert served after a meal have on eating behavior?
A) It is typically refused due to the physiological effects of CCK.
B) It can stimulate additional eating, even if physiological needs are met, due to hedonic eating.
C) It decreases overall calorie intake by enhancing early satiety.
D) It has no effect on appetite due to the overriding effects of ghrelin.

Answer 6

B