Ch. 26 - Animal Systems II

Question 1

neuron

Answer 1

• nerve cells; specialized for carrying messages throughout the nervous system

Question 2

stimulus

Answer 2

• signal to which an angiosperm responds

Question 3

sensory neuron

Answer 3

• type of nerve cells that receives information from sensory receptors and conveys signals to the central nervous system

Question 4

interneuron

Answer 4

• type of neuron that processes information and may relay information to motor neurons

Question 5

response

Answer 5

• specific reaction to a stimulus

Question 6

motor neuron

Answer 6

• type of nerve cell that carries directions from interneurons to either muscle cells or glands

Question 7

ganglion

Answer 7

• a group of interneurons

Question 8

cerebrum

Answer 8

• part of the brain responsible for voluntary activities of the body; the “thinking” region of the brain

Question 9

cerebellum

Answer 9

• part of the brain that coordinates movement and controls balance

Question 10

hydrostatic skeleton

Answer 10

• skeleton mode of fluid-filled body segments that work with muscles to allow the animal to move

Question 11

exoskeleton

Answer 11

• external skeleton; tough external covering that protects and supports the body of many invertebrates

Question 12

endoskeleton

Answer 12

• internal skeleton; structural support system within the body of an animal

Question 13

joint

Answer 13

• place where one bone attaches to another bone

Question 14

placenta

Answer 14

• specialized organ in placental mammals through which respiratory gases, nutrients, and wastes are exchanged between the mother and her developing young

Question 15

metamorphosis

Answer 15

• process of changes in shape and form of a larva into an adult

Question 16

amniotic egg

Answer 16

• egg composed of shell and membranes that creates a protected environment in which the embryo can develop out of water

Question 17

mammary gland

Answer 17

• gland in female mammals that produces milk to nourish the young

Question 18

endocrine gland

Answer 18

• gland that releases its secretions (hormones) directly into the blood, which transports the secretions to other areas of the body

Question 19

ectotherm

Answer 19

• animal whose body temperature is determined by the temperature of its environment

Question 20

endotherm

Answer 20

• animal whose body temperature is regulated, at least in part, using heat generated within its body