Tissue part 2

Question 1

pH of sweat is acidic, and acts as a bactericide. Oil contains
bactericide to inhibit bacterial growth as well.
• ____- prevents UV damage

Answer 1

Chemical barrier

Melanin

Question 2

stratified cell layer of skin and keratin

make skin difficult to penetrate

Answer 2

Physical barrier

Question 3

Dendritic (Langerhans) cells activate
immune system by presenting foreign substance to lymphocytes
(WBC)

Answer 3

Biological barrier

Question 4

1.______-brings more blood to surface to release heat

• 2.______- evaporation dissipates heat

Answer 4

High Body Temperature

1. Blood vessels dilate
2. secrete sweat

Question 5

Dermal blood vessels constrict = blood bypasses skin retaining heat for internal systems
• _____? stores fat to retain heat
• Hair follicles also act as insulator

Answer 5

Low body temperature

Adipose

Question 6

Contains receptors that respond to stimuli outside body

Answer 6

CUTANEOUS SENSATION

Question 7

detect pain and extreme temperatures

Answer 7

Free nerve endings

Question 8

detect light touch or pressure

Answer 8

Meissner’s (Tactile ) corpuscles

Question 9

detect deeper more

profound touch or pressure and vibrations

Answer 9

Pacinian (Lamellar) corpuscles

Question 10

detect touch, movement (insects)

Answer 10

Hair follicles

Question 11

stimulates skin cells to produce vitamin D (inactive

form)

Answer 11

UV Light

Question 12

targets intestines to increase Ca2+ absorption = this

increases Ca2+ blood levels

Answer 12

Calcitriol

Question 13

Blood Reservoir contains____ of body’s blood

Answer 13

5%

Question 14

Loss of salts and water through sweat

• Can also excrete small amounts of CO2, NH3, and urea

Answer 14

EXCRETION/ABSORPTION

Question 15

Most skin tumors are benign (do not metastasize)
• Risk factors (Overexposure to UV radiation
• Frequent irritation of the skin)

Answer 15

Skin Cancer

Question 16

3 MAJOR TYPE OF SKIN CNACER
( 1.Least malignant, most common)
( 2.Second most common)
(3.Most dangerous)

Answer 16

1. Basal cell carcinoma
2. Squamous cell carcinoma
3. Melanoma