Hunger Hormones - Ghrelin and Leptin Flashcards
Name the two main hormones in relation to hunger.
Ghrelin and Leptin.
Which is the only orexigenic gut hormone?
Ghrelin
Define orexigenic:
Appetite stimulating
What impact does being obese have on ghrelin levels?
Obese individuals have less ghrelin, this rises when dieting.
What impact does Ghrelin have on appetite?
Ghrelin is an appetite stimulant.
What impact does Leptin have on hunger?
Leptin suppresses hunger.
What is the difference between appetite and hunger?
Appetite is the desire to eat, whilst hunger is the drive to eat.
How does the rise in ghrelin when dieting make effective dieting harder for obese individuals?
Low tolerance to the hormone, will have a high appetite more quickly than non-obese individuals.
TRUE or FALSE, leptin and ghrelin both act on the hypothalamus
TRUE
Ghrelin acting on the hypothalamus stimulates the release of which appetite stimulant?
Neuropeptide Y
Leptin acting on the hypothalamus stimulates the release of which hunger suppressant?
Melanocyte stimulating hormone (MSH)
What happens to Ghrelin levels between meals?
Ghrelin levels rise when the stomach is empty.
Ghrelin only has an active form, TRUE or FALSE?
FALSE, Ghrelin has both an active and inactive form.
What occurs as a result of administering ghrelin, both peripherally and centrally?
Stimulates food intake.
Where is leptin produced?
White adipose tissue
