Chapter 6 Part 2

Question 1

Scales maybe modified for

Answer 1

specific functions

Question 2

Belly scales help with

Answer 2

locomotion

Question 3

Chromatophores mostly dermal-used for

Answer 3

cryptic coloration, mimicry, aposematic coloration, thermoregulation, sex recognition

Question 4

Birds: Ventral apterium (brood patch) is

Answer 4

portion of breast that lacks contour feathers

Question 5

Nesting season-contour feathers fall out, dermis becomes highly vascular, can

Answer 5

warm eggs

Question 6

Pterylae-

Answer 6

feather tracts

Question 7

Birds have glands: examples are

Answer 7

Uropygial (secretes protein compound-smears on feathers for water/insect repellency) and Salt gland (excrete excess salt ingested)

Question 8

Rachis-

Answer 8

central shaft

Question 9

Barbs, interlocking barbules make up

Answer 9

vanes

Question 10

Calamus (quill)-

Answer 10

anchors feather to body; manipulated by dermal

Question 11

Feather Types are

Answer 11

Pennaceous and Plumulaceous

Question 12

Birds: chromatophores in epidermis-

Answer 12

pigments carried into feathers. Light refraction creates iridescent colors

Question 13

Axis of rotation in asymmetrical feathers creates

Answer 13

uniform, closed surface on downstroke

Question 14

Periodically molted-altered pelage characteristics in

Answer 14

color, density

Question 15

Sense of touch (mechanical displacement)- stimulates nerve cell, occurs around

Answer 15

mouth, legs, nose, eyes

Question 16

Chromatophores secrete granules of melanin, are carried into

Answer 16

shafts of hair

Question 17

Hair color depends on amount of

Answer 17

pigment and air in hair shaft

Question 17

Sebaceous (oil) glands-

Answer 17

lubricates and waterproofs skin/hair

Question 18

Some mammals show

Answer 18

aposematic coloration

Question 19

Eccrine (sweat) glands-

Answer 19

release watery secretions for evaporative cooling