Quiz 6 Hypothalamus

Question 1

The hypothalamus forms what?

Answer 1

Floor for the 4th ventricle & portions of the 3rd ventricles lateral walls

Question 2

What else is considered apart of the structure of the hypothalamus?

Answer 2

Infundibular stalk, and the optic chiasma

Question 3

What are the 2 zones of the hypothalamus?

Answer 3

Medial & lateral zones

Question 4

The medial zone can be subdivided into?

Answer 4

Anterior, intermediate & posterior areas

Question 5

Has vague control of?

Answer 5

hunger, thirst, & sex

Question 6

Hypothalamus controls ________ aspects of _______ expression

Answer 6

Physical, emotional

Question 7

Hypothalamus has control over _______ functions

Answer 7

Visceral (autonomic)

Question 8

Anterior & intermediate areas
Increases digestive motility
Decreases heart rate
Constriction of the pupil

Answer 8

Parasympathetic control

Question 9

Posterior area (includes the post. nuclei & the mammillary bodies)
Increases heart rate & vasoconstriction
Decreases digestive motility
Responsible for pupil dilation, piloerection & sweat gland secretions

Answer 9

Sympathetic control

Question 10

• Directly via neuron axon extensions into the posterior pituitary
• Indirectly via neurohormones to control the release of anterior pituitary hormones

Answer 10

Endocrine control from the hypothalamus

Question 11

Area just above the optic chiasma

Answer 11

Anterior area

Question 12

Nuclei found in the anterior area: (of the medial zone of the hypothalamus)

Answer 12

Supraoptic & paraventricular nuclei
Suprachiasmatic Nuclei (SCN)
Anterior nucleus
Preoptic area (nucleus)

Question 13

This nuclei terminates in the posterior pituitary where they both release _______ and ADH hormones

Answer 13

Supraoptic & paraventricular nuclei

Oxytocin

Question 14

Stimulates uterine contraction & the let down of breast milk

Answer 14

Oxytocin

Question 15

Prevention of urination or help to retain H2O

Answer 15

ADH

Question 16

Nucleus responsible for much of our circadial (daily) rhythms like temp, sleep, light, feeding…

Answer 16

Suprachiamatic Nuclei (SCN)

Question 17

Suprachiamtic Nuclei is complexly connected to the ______ gland & it secretions into the bloodstream

Answer 17

Pineal gland

Question 18

Gnerally known for parasympathetic functions

Answer 18

Anterior nucleus

Question 19

Thermo-regulator; Esp. as the body HEATS up

Answer 19

Preoptic area (nucleus)

Question 20

Nuclei found in the Intermediate area of the medial zone of the hypothalamus?

Answer 20

Dorsomedial nuclei
Ventromedial nuclei
Arcuate nuclei
Tuber cinereum

Question 21

Significant GI tract parasympathetic influence, The nucleus is fairly diffuse

Answer 21

Dorsomedial nuclei

Question 22

Very complex & many attributes. A center for eating & thirst gratification or fullness center

Answer 22

Ventromedial Nuclei

Question 23

• Near the infundibular stalk
• Contribute axons to the so-called tract tuberoinfundibular tract
• Terminate & secrete their neurohormones into the perivascular spaces of the infundibular stalk

Answer 23

Arcuate nuclei

Question 24

Neurohormones (of the arcuate nuclei) pass to the anterior pituitary by way of the bloodstream where they influence the release of pituitary hormones. Commonly know as:

Answer 24

Releasing factors

Question 25

A term used to describe the undulating bulge between the infundibular stalk & the large mammillary bodies.

Answer 25

Tuber cinereum

Question 26

Posterior area include what nuclei?

Answer 26

Mammillary bodies

Posterior nuclei

Question 27

Nucleus (with hippocampal formation & anterior thalamic nuclei) important in short term memory

Answer 27

Mammillary bodies

Question 28

Korsakov’s Syndrome

Answer 28

Loss of short term memory (from alcohol)

Question 29

Thermoregulator: esp. as the body cools down. Stimulating shivering

Answer 29

Posterior nuclei

Question 30

______ area is known for diverse sympathetic actions.

Answer 30

Posterior area

Question 31

Pars nervosa and neurohypophsysis are another name for?

Answer 31

Posterior pituitary

Question 32

The posterior pituitary develops from what embryologically?

Answer 32

Diencephalon

Question 33

What is another name for the posterior pituitary ?

Answer 33

Pars nervousa or neurohypophysis

Question 34

Which area gives rise to the anterior pituitary (adenohypophysis) and intermediate pituitary?

Answer 34

Rathke’s pouch

Question 35

What would fibers from the hypothalamic nuclei be doing if they descends to specific nuclei for cranial nerve III, VII, IX or X?

Answer 35

Parasympathic

Question 36

Most blood to the pituitary & infundibular stalk comes from branches of the?

Answer 36

Internal carotid arteries

Question 37

Within the infundibular stalk the small arteries break into highly permeable capillaries called?

Answer 37

Fenestrated sinusoids

Question 38

The fenestrated sinusoids pick up ______ _____ from the ________________ tract fibers.

Answer 38

Releasing factors ; tuberoinfundibular tract fibers

Question 39

A series of small veins drain the hormone - laden blood b/t 2 capillary beds are called ?

Answer 39

Hypophyseal portal vein

Question 40

Once the releasing factors enter the substance of the anterior pituitary they exert a controlling influence on the release of the ?

Answer 40

Pituitary hormones