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neuroscience > eating behaviour > Flashcards

eating behaviour Flashcards

1
Q

What is behaviour defined as?

A

The response of an organism to a stimulus

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2
Q

What is motivation?

A

driving force behind a behavour

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3
Q

What part of the brain is eating behaviour controlled by?

A

hypothalamus

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4
Q

Where does hypothalamus develop from?

A

diencephalon

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5
Q

What is anabolism and catabolism?

A

anabolism- building up macromolecules for energy storage

catabolism - breaking down of macromolecules for energy usage

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6
Q

What happened when there was lesion to both side of rats brain?

A

they were anorexic

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7
Q

What happened to rats if there was bilateral lesions in venteromedial hypothamus?

A

overeating and obesity

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8
Q

what is soluble protein responsible for eating behaviour and who discovered it?

A

Friedman founded LEPTIN

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9
Q

Where is leptin released from?

A

FAT CELLS

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10
Q

What does leptin do?

A

decrease eating behaviour and increase energy expenditure

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11
Q

What happens to leptin levels during startavtion?

A

leptin levels lower, which stimulates eating behaviour and reduces energy expenditure

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12
Q

What receptors does leptin act on?

A

receptors on neurons in ARCUATE nucleus in hypothalamus

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13
Q

What neurotransmitters are released when leptin binds to receptors?

A

alpha-msh and cart

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14
Q

What happens when the paraventricular nucleus is stimulated?

A

release TSH and ACTH from anterior pituitary gland.

act on thyroid and adrenal glands to INCREASE METABOLC RATE

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15
Q

what happens when brain stem is stimulated ?

A

sympathetic activity increased, body temp rises

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16
Q

How is feeding behaviour inhibited?

A

by somatic motor activity through stimulation of cells in lateral hypthalamus

17
Q

What happens when leptin levels decrease?

A

switch of effects of alpha-msh and cart

18
Q

WHat neurons does a fall in leptin stimulate?

A

Nuerons stimulated that contain NPY and AgRP which.

19
Q

What does NPY and AgRP do?

A

inhibit TSH and ACTH secretion from paraventricular nucleus.
stimulate feeding behaviour
activate parasympathetic NS

20
Q

What are short term signals in eating behavour?

A

satiety signals ( and sensation of fullness)

21
Q

Where do neurons that contain alpha-msh and CART send projections to?

A

paraventricular nucleus (in hypothalamus)
lower brain stem and spinal cord
lateral hypothamamus

neuroscience (21 decks)

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