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MED220 > Lecture21: Hypothalamus > Flashcards

Lecture21: Hypothalamus Flashcards

1
Q

The releasing and inhibiting hormones in the reg of endocrine functions control the release of ?

A

Anterior Pituitary hormones

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2
Q

Which nucleus mainly secretes ADH?

A

Supraoptic

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3
Q

Which nucleus mainly secretes Oxytocin?

A

Paraventricular

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4
Q

Emotional stimuli excites which 2 nuclei?

A

Dorsomedial and Posterior

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5
Q

These 2 nuclei send impulses to the adrenal medulla to incite the release of..?

A

Catecholamines

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6
Q

Which heat-type is detected in the periphery?

A

Cold

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7
Q

Where is central heat detected?

A

Pre optic area

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8
Q

What does the Anterior Hypothalamus act as?

A

The heat loss center

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9
Q

What actions does the Heat loss center do?

A

Sweating and Vasodilation

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10
Q

What does the Posterior Hypothalamus act as?

A

The heat gain center

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11
Q

What actions does the heat gain center do?

A

Vasoconstriction and shivering

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12
Q

What is the clinical implication of a lesion in the anterior hypothalamus?

A

Hyperthermia

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13
Q

Which 2 hormones produce a rapid and short lived increase in heat production?

A

Epinephrine and norepinephrine

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14
Q

Which hormones produce a slower increase in heat production?

A

Thyroid hormones

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15
Q

Which nucleus is associated with the feeding center?

A

Lateral nucleus

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16
Q

Which center is responsible for feeling full?

A

Satiety center

17
Q

Which nucleus is associated with the satiety center?

A

Ventromedial

18
Q

Explain the Glucostatic hypothesis

A

The ingestion of food increases glucose uptake in the satiety center via glucostats

19
Q

Why is the Glucostatic hypothesis debunked by the obese?

A

Due to the satiety center being insulin dependent

20
Q

Explain the Lipostatic Hypothesis

A

Leptin hormone acts on the hypothalamus to decrease food intake

21
Q

What secretes this leptin hormone?

A

Adipose tissue

22
Q

Which nucleus releases neuropeptide Y?

A

Arcuate nucleus

23
Q

Which nucleus releases Orexin?

A

Lateral nucleus

24
Q

Which nucleus is responsible for the thirst center?

A

Supraoptic

25
Q

Which nucleus is responsible for the circadian control?

A

Supra-chiasmic

26
Q

where is the Supra-chiasmic nucleus?

A

Anterior hypothalamus

27
Q

Which nucleus is feeding related?

A

Lateral nucleus

28
Q

Which nucleus is responsible for satiety?

A

Venteromedial

29
Q

Which nucleus is for thirst?

A

Supraoptic

30
Q

Which nucleus is for sleep?

A

Anterior hypothalamus

31
Q

Which nucleus is for arousal?

A

Posterior hypothalamus

32
Q

What is the rage center?

A

Lateral Hypothalamus

33
Q

What is the placidity center?

A

Venteromedial nucleus

MED220 (24 decks)

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