BIO FINAL II

Question 1

Epidermis

Answer 1

Outer Protective layer
Melanin- pigment
produced by melanocytes
Social Function
Acid mantle- slightly acidic pH layer

Question 2

Dermis

Answer 2

Made of connective tissue
Elastin+collagen
Nerves, blood vessels, sweat glands
fingerprints (papillary)and wrinkles form here (striae)

Question 3

Solar elastosis

Answer 3

Elastin damaged by the sun

Question 4

hypodermis

Answer 4

FAT
padding
social Function
(you can definitely see it on some people)

Question 5

Muscle contraction basics

Answer 5

Signal arrives at nuromuscular junction
ACH is released which binds to the receptors of the muscle
NA and K move through the ion channels
Action potential causes Ca release
This causes Myosin and actin to bind and contraction begins

Question 6

Actin

Answer 6

thin fillaments

Question 7

myosin

Answer 7

thick fillaments

Question 8

sarcomere

Answer 8

shortest contractable muscle fiber

Question 9

hypothalamus

Answer 9

brain region that produces gonadotropin which stimulates pituitary

Question 10

adrenal gland

Answer 10

produces epinepherine

Question 11

Puberty M

Answer 11

Tanner
1 prepubertal- no noticeable
2 pubic hair and testes enlarge
3 voice cracks, muscles larger, pubic hair larger
4 acne, armpit hair
5 puberty complete

Question 12

F horomones

Answer 12

Progesterone- prepares uterus for pregnancy
Estrogen- F sexual and reproductive development

Question 13

Puberty F

Answer 13

pubarche- beginning of puberty
thelarche-breast development
menarche-first menstration