Chapter 16-Mammals Flashcards Preview

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Flashcards in Chapter 16-Mammals Deck (102)
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1

What term refers to an animal being capable of moving their bodies from place to place?

Motile

2

What term refers to an animal being attached to one location but are able to move the environment (air and water) toward themselves for the purpose of trapping food?

Sessile

3

Many living things possess the quality of:

Symmetry

4

What kind of symmetry can be cut in half in only one plane to make each half like the other?

Bilateral symmetry

5

What kind of symmetry an be cut in half in any way you wish, and you will always have the same shape on one side as on the other?

Radial symmetry

6

What kind of symmetry display great variation in form, changing shape almost constantly, and literally means without symmetry?

Asymmetrical

7

What division of animals are animals with a backbone?

Vertebrates

8

What division of animals are animals without a backbone?

Invertebrates

9

Vertebrates, which make up only about 3% of all animals, include the more familiar animals:

Mammals, birds, reptiles, amphibians, and fish

10

All vertebrates have an internal framework, or skeleton, called an ______________ made of bone or cartilage or a combination of the two.

Endoskeleton

11

What term refers to animals with four appendages or limbs attached by special bones to the body at the hips and shoulders?

Tetrapods

12

Modern evolutionists usually place vertebrates within a slightly larger group known as the phylum ___________________, which is made on the basis of embryonic similarities.

Chordata

13

Animals of the class ______________, are the most familiar and most dominant group of vertebrates on the earth today, are warm-blooded, have hair, and are provided with special glands for producing milk, has lungs, a four-chambered heart, a pair of limbs, and seven neck vertebrae.

Mammals

14

What kind of glands, as well as all glands of a mammal's body, are specialized epithelial cells.

Mammary glands

15

What term refers to an animal that regulates its temperature by internal mechanisms (altering blood flow, shivering, sweating, panting, etc.)?

Warm-blooded

16

What term refers to an animal that must regulate its temperature by external factors (such as lying in the sun when its body temperature is too low or cooling off in the shade when its temperature is too high)?

Cold-blooded

17

All mammals are considered to be:

Warm-blooded

18

Warm-blooded animals are said to be _______________, because the ability to regulate their temperature internally allows warm-blooded animals to maintain a stable body temperature regardless of their environment.

Homeothermic

19

Biologists characterize ______________ as living organisms that move from place to place in their environment, mainly for the purpose of obtaining food.

Animals

20

What is the special ability that mammals have where their body temperature falls within a degree or two of the freezing point, and their respiration and heartbeat slow as well?

Hibernation

21

Warm-blooded animals such as mammals need the efficiency provided by a ______________ heart.

Four-chambered

22

What are the flesh-eating animals that feed on herbivores?

Carnivores

23

What are the plant-eating animals?

Herbivores

24

What are the animals that are both plant-eaters and flesh-eaters?

Omnivores

25

As the fertilized egg moves through the oviduct toward the uterus, it divides many times, increasing the number of cells until it is a hollow sphere of cells, called a:

Blastula

26

In most orders of the placental mammals the region of implantation between the developing young and the tissues of the uterus will become the ____________, half of which will belong to the young and half will be the mother's.

Placenta

27

The embryo takes form when the blastula forms three distinct layers of cells called the ______________. From these three layers of cells, all of the body parts will be formed.

Primary germ layers

28

What are the three primary germ layers?

Ectoderm (outer layer),
Mesoderm (middle later),
Endoderm (inner layer)

29

What is the outer layer of the primary germ layer where the cells in it will specialize into the nervous system, sensory organs, and skin?

Ectoderm

30

What is the middle layer of the primary germ layers where the cells in it will specialize into muscle, bone, blood, lymph vessels, reproductive organs, and kidneys?

Mesoderm