Chapter 12: Nervous Tissue

Question 0

The central nervous system includes:

Answer 0

The brain and spinal cord.

Question 1

Nervous system is organized into two main subdivisions.

What are they?

Answer 1

The central nervous system, the peripheral nervous system.

Question 2

What does the peripheral nervous system include?

Answer 2

The peripheral nervous system includes all nervous tissue outside of the central nervous system.

Question 3

Components of the peripheral nervous system include:

Answer 3

Nerves, ganglia, enteric plexus, and sensory receptors.

Question 4

The PNS is divided into three systems, including:

Answer 4

1) somatic nervous system
2) autonomic nervous system
3) enteric nervous system

Question 5

The characteristics of the somatic nervous system are:

Answer 5

1) sensory neurons in the head, body wall, limbs, vision, hearing, taste, smell.
2) Motor neurons in the skeletal muscles.
3) Control is voluntary.

Question 6

Characteristics of the autonomic nervous system include:

Answer 6

1) sensory neurons in the autonomic sensory receptors and neurons.
2) Motor neurons in the smooth muscles, cardiac muscles, and glands.
3) Control is involuntary.

Question 7

Characteristics of the enteric nervous system include:

Answer 7

1) sensory receptors in the enteric sensory receptors and neurons.
2) Motor neurons in the smooth muscles, glands, and endocrine cells of the G.I. tract.
3) Control is involuntary.

Question 8

True or false:

The peripheral nervous system may be divided into somatic and autonomic nervous system’s?

Answer 8

True.

Question 9

True or false:

The peripheral nervous system is responsible for storing and processing information?

Answer 9

False.

Question 10

True or false:

The peripheral nervous system is only involved with involuntary activities?

Answer 10

False.

Question 11

The peripheral nervous system includes the brain and spinal cord?

Answer 11

False.

Question 12

True or false:

Somatic nervous system include sympathetic and parasympathetic divisions?

Answer 12

False. That would be the autonomic nervous system.

Question 13

True or false:

The somatic nervous system regulates the gastrointestinal tract?

Answer 13

False. The enteric system regulates the gastrointestinal tract.

Question 14

True or false:

The somatic nervous system relies on the autonomic nervous system for control?

Answer 14

False.

Question 15

True or false:

The somatic nervous system includes motor neurons to smooth the muscles?

Answer 15

False.
Both the autonomic nervous system and the enteric therapist system include motor neurons for the smooth muscles.
Somatic nervous system does not.

Question 16

True or false:

The somatic nervous system can consciously control skeletal muscles?

Answer 16

True.

Question 17

Nervous tissue comprises two types of cells.

What are they?

Answer 17

Neurons and neuroglia.

Question 18

Most neurons have three parts.

What are they?

Answer 18

The cell body, dendrites, and an axon.

Question 19

Diagram question:

What do dendrites look like?

Answer 19

Dendrites sort of resemble baobab trees as described on the little princes home planet; they look like they are roots coming from the cell body.

Question 20

Diagram question: Neurons

What does the cell body look like?

Answer 20

The cell body has dendrites sprouting from the head.

It almost resembles the head of a sperm.

Question 21

Diagram question: neuron

What does an axon look like?

Answer 21

In this diagram, the axon almost appears to be the main body of the tail of a sperm located beneath the myelin sheath.

Question 22

Diagram question: neuron.

What does a myelin sheath look like?

Answer 22

The myelin sheath is the covering found intermittently on the axon.

Question 23

Diagram question: neuron.

What does a Node of Ranvier look like?

Answer 23

The space exposed intermittently between the myelin sheath and the exposed portion of the axon.

Question 24

Diagram question: neuron.

What does the synaptic end bulb look like?

Answer 24

The synoptic in bold is at the tail end of the neuron. It is located at the very end of what appears to also be a tree is the circular end at the very tip.

Question 25

Neuroglia of the CNS can be categorized into four types:

Answer 25

1) astrocytes
2) oligodendrocytes
3) microglial cells
4) ependymal

Question 26

Neuroglia of the PNS can be categorized into two types:

Answer 26

Schwan cells and satellite cells.

Question 27

What is myelin sheath?

Answer 27

A multilayered, lipid and protein covering around some axons.

Question 28

Which type of neuroglia form the myelin sheath around the axons in the CNS?

Answer 28

Oligodendrocytes.

Question 29

Which type of neuroglia form the myelin sheath around the axons in the PNS?

Answer 29

Schwan cells.

Question 30

Myelination increases/decreases the speed of nerve impulse conduction.

Answer 30

Increases.

Question 31

Multiple sclerosis is is an autoimmune disease characterized by the loss of myelin sheath.
True or false?

Answer 31

True

Question 32

Define.

Ganglion: axons/neuronal cell bodies in the PNS/CNS.

Answer 32

Ganglion: neuronal cell bodies in the PNS.

Question 33

Nucleus: axons/neuronal cell bodies in the PNS/CNS.

Answer 33

Nucleus: neuronal cell bodies in the CNS.

Question 34

Nerve: axons/neuronal cell bodies in the PNS/CNS.

Answer 34

Nerve: axons in the PNS.

Question 35

Tract: Axons/neuronal cell bodies in the PNS/CNS.

Answer 35

Tracked: axons in the CNS.

Question 36

White matter: is composed myelinated/unmyelinated axons.

Answer 36

White matter is composed of myelinated axon’s.