Chapter 6 Part 1

Question 1

Epidermis produces mucus-moistens skin surface, chance of bacterial infections/water turbulence goes…

Answer 1

down

Question 2

Epidermis in terrest. vert: keratinized/cornifies layer-stratum corneum is adaptive for…

Answer 2

life in dry/abrasive envrmt; all dead cells

Question 3

In Integument structures, Epidermis produces

Answer 3

mucus and scales

Question 4

Scales-folds in integument: dermal scales/epidermal scales produces

Answer 4

hair, feathers, claws, baleen, etc.

Question 5

Dermis: made of fibrous connective tissue, collagen fibers: produces

Answer 5

dermal bones

Question 6

Sharks collagen fibers lie at…

Answer 6

angles to each other

Question 7

Accommodates lateral bending but resists

Answer 7

distortion of body shape

Question 8

Skin stretches w/o wrinkling-decreases

Answer 8

turbulence

Question 9

Hypodermis (superficial fascia) consists of loose…

Answer 9

connective tissue/adipose tissues

Question 10

Chondrichthyes (cartilaginous fishes like sharks) have placoid scales develop in dermis and

Answer 10

project through epidermis (cap of enamel w/dentin below)

Question 11

Bony fishes: dermal scales are close to

Answer 11

surface. Cells in thin epidermal layer produce mucus

Question 12

Amphibians-cutaneous respiration: have high vascular lower…

Answer 12

epidermis

Question 13

Nuptial pads-

Answer 13

cornified epidermis forms on male digits/limbs during breeding season

Question 14

Amphibians: have poison and mucus glands located in

Answer 14

dermis; have ducts that lead to surface

Question 15

Poison glands can have stored secretions in

Answer 15

lumen of gland

Question 16

Reptiles have

Answer 16

hard keratinization, adjacent scales-have flexible hinges, scales are folds in surface epidermis, maybe modified into “horns”, spines, crests, some have dermal bones

Question 17

Osteoderms are

Answer 17

crocs, some lizards

Question 18

Ecdysis/molting is

Answer 18

shedding of cornified layer