Exam 3 Part 2

Question 1

Diencephalon

Answer 1

interbrain
lies deep to cerebrum
mostly relay area; mostly white matter, some gray (nuclei)
part of limbic system (emotional brain)

Question 2

Forebrain

Answer 2

cerebrum + diencephalon

Question 3

Diencephalon components

Answer 3

epithalamus
thalamus
hypothalamus

Question 4

Epithalamus

Answer 4

roof of diencephalon, over 3rd ventricle

Choroid plexus -blood capillaries and ependymal cells -> CSF in 3rd ventricle

Question 5

Pineal gland

Answer 5

in epithalamus

secretes hormone melatonin

Question 6

melatonin

Answer 6

secreted by pineal gland

light-mediated hormone responses, sleep/wake, biorhythms

Question 7

Thalamus

Answer 7

paired oval masses each with many nuclei
1 below each lateral ventricle, usually linked by interthalamic adhesion
forms walls of 3rd ventricle
relay center/filter for all sensory impulses except smell
optic chiasma (cross over)

Question 8

Hypothalamus

Answer 8

below thalamus (floor of diencephalon)
forms floor and part of sides of 3rd ventricle
many nuclei; regulation of ANS, many endocrine functions; control of body temp, emotional behavior, thirst, hunger, sex drive, etc
includes mammillary bodies, pituitary gland

Question 9

mammillary bodies

Answer 9

in hypothalamus
nuclei-feeding reflexes
2 in humans

Question 10

pituitary gland

Answer 10

in hypothalamus; also called hypophysis
attached via infundibulum
hormone secretion

Question 11

inter

Answer 11

between

Question 12

mammillary

Answer 12

nipple