Nervous System

Question 1

Function of Nervous System

Answer 1

The functions 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

Creates isolation

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

Between the arachnoid layer and the pia mater is the cerebrospinal fluid. The cerebrospinal fluid protects the brain by preventing the it from contacting the skull.

Question 12

Cerebrum

Answer 12

Largest part of brain
Divided into 2 hemispheres
Outer cerebral cortex= “gray matter,” made of cell bodies & dendrites
Controls conscious activities

Question 13

Frontal Lobe

Answer 13

Voluntary movements (walking),Reasoning & decision-making,Memory,Ability to predict consequences of actions,Planning,Verbal communication

Question 14

Parietal Lobe

Answer 14

The parietal lobe controls:

Sensations ,Visual-spatial processing, Body position

Question 15

Occipital Lobe

Answer 15

The occipital lobe controls:

Visual processing- vision & memory of objects

Question 16

Temporal Lobe

Answer 16

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

Question 17

Thalamus

Answer 17

2 bulb-shaped halves in the center of the brain

Relays sensory impulses to the cerebral cortex for processing and sorting

Question 18

Hypothalamus

Answer 18

Controls hormones released by pituitary gland (often called the “master endocrine gland”)
Responsible for autonomic processes (body temperature, hunger, sleep, thirst, blood volume)

Question 19

Brainstem

Answer 19

Located between the cerebrum and spinal cord.it has 3 regions ,midbrain, pons,Medulla Oblongata

Question 20

Brainstem (Midbrain)

Answer 20

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

Question 21

Brainstem (Pons)

Answer 21

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

Brainstem (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

Question 25

Merkel's disc

Answer 25

located superficially in the dermis of skin at the base of the epidermis, and lie adjacent to Meissner's corpuscles and sweat glands

Question 26

Hair follicle receptors

Answer 26

Were hair comes out