Nervous System

Question 1

Function of Nervous System

Answer 1

The function of the nervous system is to detect impulses from the senses; control center of the body

Question 2

Major Organs of Nervous System

Answer 2

Brain
Spinal Cord
Senses
Nerves

Question 3

Difference between Neurons and Neuroglia

Answer 3

Neurons (make up 10% of the nervous system)

Neuroglia (“nerve-glue”, make up 90% of the nervous system)

Question 4

Dendrite

Answer 4

receive the nerve impulses from the senses or another neuron

Question 5

Soma

Answer 5

body of the neuron that holds the nucleus

Question 6

Schwann Cells

Answer 6

play essential roles in the development, maintenance, function, and regeneration of peripheral nerves.

Question 7

Node of Ranvier

Answer 7

impulses jump from node to node, which increase speed of impulse

Question 8

Myelin

Answer 8

insulates the axon. Produced by the Schwann cells

Question 9

Axon

Answer 9

passageway for nerve impulses after cell body; end in axon terminal

Question 10

Axon Terminal

Answer 10

the button-like endings of axons through which axons make contact with other nerve cells.

Question 11

CSF

Answer 11

The cerebrospinal fluid protects the brain by preventing the it from contacting the skull.

Question 12

Cerebrum

Answer 12

Largest part of brain

Question 13

frontal lobe

Answer 13

Voluntary movements (walking)

Reasoning & decision-making

Memory

Ability to predict consequences of actions

Planning

Verbal communication

Question 14

temporal lobe

Answer 14

The temporal lobe controls:
Memory
Comprehension & pronunciation of words
Sensations of smell and sound
Emotional association of memories

Question 15

parietal lode

Answer 15

The parietal lobe controls:
Sensations
Visual-spatial processing
Body position

Question 16

occipital lobe

Answer 16

The occipital lobe controls:

Visual processing- vision & memory of objects

Question 17

Thalamus

Answer 17

Relays sensory impulses to the cerebral cortex for processing and sorting

Question 18

Hypothalamus

Answer 18

Responsible for autonomic processes (body temperature, hunger, sleep, thirst, blood volume, etc)

Question 19

Brainstem

Answer 19

Located between the cerebrum and spinal cord.

Question 20

midbrain

Answer 20

Also known as mesencephalon
Relays info to cerebrum
Controls body movements and postures

Question 21

pons

Answer 21

The Bridge!
Almost completely made of white matter that links cerebral cortex and cerebellum
Carries info from one side of brain to the other (why its called the bridge)
Central control of breathing

Question 22

medulla oblongata

Answer 22

Located above the spinal cord
Transmits impulses between spinal cord and the brain
Controls blood pressure, heart rate, swallowing, and coughing

Question 23

Cerebellum

Answer 23

Second largest part of brain
Near back of skull
Responsible for coordinating the movements directed by the cerebrum so that they are graceful and efficient
All involuntary movements
Aids in “muscle memory”

Question 24

Spinal Cord

Answer 24

Extends from the medulla oblongata
31 pairs of spinal nerves branch out from the spinal cord, connecting to all parts of the body
Relays impulses from the PNS to the brain
A cross section of the spinal cord has a “butterfly” of gray matter surrounded by white matter