Lesson 6e: Mammals

Question 1

It is a critical sign of being a mammal.

Answer 1

Hair

Question 2

The ________ in the nasal cavity provide a high surface area for warming
and moistening inspired air and for reducing moisture loss during exhalation.

Answer 2

Turbinate bone

Question 3

This are sensory hairs; they provide a tactile sense to nocturnal mammals.

Answer 3

Vibrissae or whiskers

Question 4

This are tubular glands, highly coiled glands found in mammals but never in
other vertebrates.

Answer 4

Sweat glands

Question 5

What type of teeth in mammals that is absent in deciduous set.

Answer 5

Premolar

Question 6

It is a chain of glucose molecules, but the chemical bonds are difficult to
break.

Answer 6

Cellulose

Question 7

What do we callan animal with 4 chamber stomach?

Answer 7

ruminants

Question 8

The only mammal that lays egg.

Answer 8

Platypus

Question 9

Time of female receptivity is known as.

Answer 9

Heat or estrous

Question 10

Animals with only one breeding season a year are ____; while recurrent
breeding is __________.

Answer 10

monestrous, polyestrous

Question 11

Function of hair

Answer 11

PCWor BSST

Protection
Concealment
Waterproofing
Buoyancy
Signaling
Sensitive vibrissae
Thermal Insulation

Question 12

This group evolved a high metabolic rate that supported a more active life.

Answer 12

Cynodonts

Question 13

What lineage where the earliest synapsids radiated into diverse herbivorous and carnivorous pelycosaur

Answer 13

Therapsids Lineage

Question 14

3 Hair Layers

Answer 14

MCO

Medulla or pith
Cortex with pigment granules
Outer cuticle

Question 15

2 Types of Sweat Glands

Answer 15

Eccrine Sweat Glands (hairless part)
Apocrine Sweat Glands (hairy part)

Question 16

Types of Teeth

Answer 16

Incisors
Canines
Premolars
Molars

Question 17

Function of incisors teeth

Answer 17

For snipping and biting

Question 18

Function of canine teeth

Answer 18

piercing

Question 19

Function of Molar teeth

Answer 19

crushing and grinding

Question 20

Function of Premolar teeth

Answer 20

shearing and slicing

Question 21

Skin is made of _________ and _________.

Answer 21

dermis and epidermis

Question 22

The ________ were also the first amniotes to radiate widely into terrestrial habitats

Answer 22

Synapsids

Question 23

The only synapsid group to survive Paleozoic

Answer 23

Therapsids

Question 24

The first to have an efficient erect gait with upright limbs beneath the body

Answer 24

Therapsids

Question 25

Hair layer that is located in the center of the hair

Answer 25

Medulla or pith

Question 26

Hair layer that is located next to the medulla

Answer 26

Cortex with pigmented granules

Question 27

This hair layer is composed of imbricated scales

Answer 27

Outer cuticle

Question 28

What animals that shed once every summer

Answer 28

Foxes and seals

Question 29

White winter fur is

Answer 29

leukemism

Question 30

Present in nearly all mammals

Answer 30

Scent Glands

Question 31

Two types of scent glands

Answer 31

1. Sebaceous Glands 2. Mammary Glands

Question 32

Animals that are insectivore

Answer 32

Shrews Moles Bats Anteaters

Question 33

Herbivores use ____________ so microorganisms can metabolize cellulose.

Answer 33

Anaerobic fermentation chambers

Question 34

The smaller the animal the greater its __________

Answer 34

Metabolic rate

Question 35

Female mammals usually restrict mating to a fertile period during the __________

Answer 35

periodic estrous cycle

Question 36

__________ are pouched, viviparous mammals

Answer 36

Marsupials

Question 37

Marsupials do have a primitive choriovitelline called ________

Answer 37

placenta

Question 38

Periods of arrest is called ______\

Answer 38

Embryonic diapause