unit1

Question 1

Metabolic Rate

Answer 1

The rate at which a person burns calories

Question 2

cancer

Answer 2

Uncontrolled cell division

Question 3

Epidermis

Answer 3

Outermost layer
Avascular: no blood vessels
Most of cells are keratinocytes
Get new epidermis 25-45 days
Keratinocytes get completely filled with keratin
Contains: keratinocytes, stratum basal, melanocytes

Question 4

Dermis

Answer 4

Middle layer of the skin
Elastic fibers
Contains: hair follicles, oil glands, and sweat glands, nerve endings

Question 5

Hypodermis

Answer 5

Bottom layers
Includes: blood vessels, adipose tissue

Question 6

Stratum basal

Answer 6

cells that are constantly dividing

Question 7

Keratin

Answer 7

cells that make keratin

Question 8

Keratinocytes

Answer 8

cells that make something(Keratin)

Question 9

melanocytes

Answer 9

cells that make pigment melanin -> it forms an umbrella over the nucleus

Question 10

collagen fibers

Answer 10

Strong , attract water (Old age: Wrinkles form because no water can hold up the skin because lack of collagen) (Swimming Wrinkles: while swimming your collagen attracts a lot of water resulting in skin to swell)

Question 11

oil glands

Answer 11

Drains into every hair follicle
Keeps hair from being brittle
Kills bacteria with chemicals

Question 12

sweat glands

Answer 12

Have 2.5 million
4 feet long
Sweat: water, salt, lactic acid
pH: 4-6