Nerves

Question 1

The Nervous system is organized into the _______ Nervous system and the __________ Nervous System.

Answer 1

Central; Peripheral

Question 2

The central nervous system is composed of the _____ and the ______ ____

Answer 2

brain; spinal cord

Question 3

What nervous system is the “middleman” network of motor and sensory fibers that connect the central nervous system to the rest of the body?

Answer 3

Peripheral

Question 4

What nervous system regulates all bodily functions and responds to external stimuli?

Answer 4

Central

Question 5

The parasympathetic and sympathetic nervous systems are part of the _________ nervous system, which is a part of the __________ nervous system.

Answer 5

Autonomic; Peripheral

Question 6

What nervous system is involved in control of the glands, blood vessels and viscera?

Answer 6

Autonomic

Question 7

The peripheral nervous system is subdivided into the _________ and ________ nervous systems which govern the involuntary and voluntary processes respectively.

Answer 7

autonomic; somatic

Question 8

What are the three “C’s” that describe nervous system function?

Answer 8

Coordinate
Communicate
Control

Question 9

What part of the autonomic nervous system stimulates the “fight or flight” response?

Answer 9

Sympathetic

Question 10

What part of the autonomic nervous system stimulates “rest and digest” functions?

Answer 10

Parasympathetic

Question 11

What is the basic unit of the nervous system?

Answer 11

Neurons

Question 12

What are the three functional groups of neurons?

Answer 12

Sensory neurons
Motor (efferent) neurons
Interneurons (association neurons)

Question 13

What are the 3 parts of a neuron?

Answer 13

Cell body
Dendrites
Axon (with Myelin sheath)

Question 14

Approximately how many neurons are in a human brain?

Answer 14

100 billion

Question 15

What structure is associated with a neuron’s conductability?

Answer 15

The Axon

Question 16

What are the two basic properties of neurons?

Answer 16

Excitability, the capacity to respond to stimuli

Conductability, the capacity to communicate impulses.

Question 17

What structure is associated with excitability?

Answer 17

The dendrites, which transmit impulses to the neuron.

Question 18

Synapse

Answer 18

The junction between any two neurons or a neuron an an end organ.

Question 19

Another word for sensory input

Answer 19

Afferent

Question 20

Another word for motor output

Answer 20

Efferent

Question 21

Integration

Answer 21

Interpreting incoming sensory information and sending out instructions in the form of motor responses.

Question 22

How much of our sensory input is through the eyes?

Answer 22

70%

Question 23

Why do we have reflexes?

Answer 23

To speed up our response to stimuli by using the spinal cord to process a hard wired response.

Question 24

The spinal cord controls our ______responses.

Answer 24

Reflex

Question 25

The Sciatic nerve branches into what two nerves in the popliteal region?

Answer 25

Common Peroneal nerve | Tibial Nerve

Question 26

Cranial Nerve 1

Answer 26

Olfactory nerve

Question 27

Cranial Nerve 2

Answer 27

Optic nerve

Question 28

Cranial nerve 4

Answer 28

Trochlear Nerve

Question 29

Cranial Nerve 5

Answer 29

Trigeminal Nerve

Question 30

Cranial Nerve 6

Answer 30

Abducent nerve (for lateral eye movement)

Question 31

Cranial nerve 7

Answer 31

Facial nerve

Question 32

Cranial nerve 8

Answer 32

Vestibulocochlear nerve

Question 33

Cranial nerve 9

Answer 33

Glossopharyngeal nerve (mixed nerve that senses taste, controls salivation and swallowing)

Question 34

Cranial Nerve 10

Answer 34

Vagus nerve (the main parasympathetic nerve that innervates the digestive organs, thymus, lungs)

Question 35

Cranial Nerve 11

Answer 35

Spinal accessory nerve (motor nerve that innervates SCM and Trapezius)

Question 36

Cranial Nerve 12

Answer 36

Hypoglossal nerve (motor nerve to tongue, controls speech)

Question 37

Nerve plexus (pl. plexi)

Answer 37

A bundle of intersecting nerves that originate from multiple spinal roots

Question 38

Why do nerve plexi contain fibers from different spinal roots?

Answer 38

To create redundant in case of injury

Question 39

Cranial Nerve 3

Answer 39

Oculomotor nerve

Question 39

The Cervical plexus originates from which vertebra?

Answer 39

C1-C5

Question 41

The names of the body's four nerve plexi

Answer 41

Cervical plexus Brachial plexus Sacral plexus Lumbar plexus