Chapter 7 Intro

Question 1

Nervous system

Answer 1

Central Nervous System and Peripheral Nervous System

Question 2

Central Nervous System

Answer 2

Relays messages, processes info, analyzes data. Involves the brain and spinal cord. Protected by the cranium and vertebral column.

Question 3

Peripheral Nervous System

Answer 3

Receives information from the environment and relays commands from CNS to organs and glands. Motor Division and Sensory Division

Question 4

Sensory Division

Answer 4

Transmits impulses from sense organs to the CNS

Question 5

Motor Division

Answer 5

Transmits impulses from CNS to muscles and glands. Somatic and Autonomic.

Question 6

Somatic

Answer 6

Regulates activities under conscious control ex) movement of skeletal muscles

Question 7

Autonomic

Answer 7

Regulates activities under nervous control ex) heartbeat, smooth muscle contractions. Sympathetic and parasympathetic.

Question 8

Parasympathetic

Answer 8

Controls organs at rest

Question 9

Sympathetic

Answer 9

Controls organs in stress

Question 10

Nerves

Answer 10

Cable-like bundles of axons that communicates the brain to the rest of the body. Nerves are made up of neurons, which are the cells of the nervous system. Neurons can transit chemical and electrical information in order to communicate.

Question 11

Sensory

Answer 11

Carry impulses from the sensory organs to the spinal cord and brain.

Question 12

Motor

Answer 12

Carry impulses from the spinal cord and brain to the muscles and glands.

Question 13

Interneurons

Answer 13

Carry impulses between sensory and motor neurons

Question 14

Interneurons

Answer 14

Carry impulses between sensory and motor neurons

Question 15

Schwann cells

Answer 15

Help maintain homeostasis and produce myelin sheaths.

Question 16

Soma

Answer 16

Cell body containing the nucleus.

Question 17

Dendrites

Answer 17

Projections of the cell body that can receive electrical stimulation from other neurons via synapses

Question 18

Myelin sheath

Answer 18

Acts as an insulator which helps speed up the rate of impulses.

Question 19

Glial cells

Answer 19

1. Surround neurons and help hold them in place.
2. Supply nutrients and oxygen to neurons.
3. Insulate neurons so that they are not directly touching.
4. Remove dead neurons and destroy foreign invaders.