Chapter 11: The Nervous System

Question 1

What are the three divisions of the nervous system?

Answer 1

1. Central Nervous system
2. Peripheral NS
3. Enteric NS

Question 2

The CNS consists of the

Answer 2

Brain and spinal cord

Question 3

The PNS includes

Answer 3

The nervous tissue outside the CNS except for the ENS

Question 4

The Somatic nervous system (voluntary nervous system)

Answer 4

Allows us to consciously control our movement

Question 5

The autonomic nervous system (involuntary nervous system)

Answer 5

Automatically regulates activities

Question 6

The motor (efferent) divison of the PNS carries

Answer 6

Motor commands from the CNS to peripheral tissues and systems

Question 7

Sensory receptors

Answer 7

Detect position, touch, pressure, pain and temperature.

Question 8

Receptors are

Answer 8

Sensory structures that detect changes in the internal or external enviroment

Question 9

Effectors are

Answer 9

Target organs and tissues that respond to neural motor commands

Question 10

The parasympathetic and sympathetic include

Answer 10

• Smooth muscle
• Cardiac muscle
• Glands
• Adipose tissue

Question 11

Dendrites

Answer 11

• Highly branched
• CNS neurons receive most of the info at the dendritic spines

Question 12

The axon contains

Answer 12

• The axon hillock
• Initial segment
• Axolemma
• Axoplasm

Question 13

The axon hillock

Answer 13

Origin of the axon from the cell body

Question 14

The initial segment

Answer 14

Where an action potential is initiated

Question 15

The axolemma

Answer 15

A specialized portion of the plasma membrane that surrounds the cytoplasm

Question 16

The axoplasma

Answer 16

contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes

Question 17

The cytoplasm surrounding the nucleus is called the

Answer 17

Perikaryon

Question 18

The perikaryon

Answer 18

contains organelles that provide energy and synthesize the chemical neurotransmitters that are important for cell-to-cell communication

Question 19

The cytoskeleton of the perikaryon contains

Answer 19

Neurofilaments

Question 20

Neurofibrils

Answer 20

Bundles of neurofilaments extend into the dendrites and the axon. Provides internal support

Question 21

The main axon trunk ends in a series of fine extensions or

Answer 21

Telodendria

Question 22

The telodendria of an axon end at

Answer 22

Axon terminals or synaptic terminals where the neuron communicates with other cells

Question 23

Synapse

Answer 23

A specialized cite where the neuron communicates with another cell

Question 24

Every synapse involves a

Answer 24

Presynaptic cell and Postsynaptic cell