Nervous System

Question 1

Function of Nervous System

Answer 1

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 brain Neuroglia make up 90%

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

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

Small swellings that are found at the terminal ends of axons

Question 11

CSF

Answer 11

CSF (Cerebrospinal fluid) to cushion the brain within the skull and serve as a shock absorber for the central nervous system

Question 12

Cerebrum

Answer 12

Largest and uppermost portion of the brain also responsible for integrating sensory impulses, directing motor activity, and controlling higher intellectual functions

Question 13

Frontal lobe

Answer 13

Front part of brain; voluntary movement, expressive language and for managing higher level executive functions

Question 14

Parietal lobe

Answer 14

Processes sensory information it receives from the outside world, mainly relating to touch, taste, and temperature

Question 15

Temporal lobe

Answer 15

Second largest part of the brain; processes affect/emotions, language, and certain aspects of visual perception

Question 16

Occipital lobe

Answer 16

Associated with visuospatial processing, distance and depth perception, color determination, object and face recognition, and memory formation

Question 17

Thalamus

Answer 17

Small structure within the brain located just above the brain stem between the cerebral cortex and the midbrain relays motor and sensory signals to the cerebral cortex

Question 18

Hypothalamus

Answer 18

Hypothalamus is to maintain your body’s internal balance, which is known as homeostasis

Question 19

Brainstem

Answer 19

Responsible for many vital functions of life, such as breathing, consciousness, blood pressure, heart rate, and sleep. The brainstem contains many critical collections of white and grey matter

Question 20

The midbrain (mesencephalon)

Answer 20

The forward-most portion of the brainstem and is associated with vision, hearing, motor control, sleep and wakefulness, arousal

Question 21

The pons (metencephalon)

Answer 21

The metencephalon contains the pons and cerebellum The nerve fibers in the pons as a conduit, making the structure a key part of sensory function as well.

Question 22

The medulla oblongata (myelencephalon)

Answer 22

Basic life support functions like respiration and heart rate The medulla oblongata also acts as a protective system that eliminates things that don’t belong (sneezing/coughing) in your body

Question 23

Cerebellum

Answer 23

Main function of the cerebellum is maintaining balance, posture, and tone of the body

Question 24

Spinal Cord

Answer 24

The pathway for messages sent by the brain to the body and from the body to the brain.

Question 25

Merkel’s

Answer 25

respond to indentation of the skin

Question 26

Hair follicle receptor

Answer 26

which means it sends and receives nerve impulses to and from the brain when the hair moves

Question 27

Ruffini’s corpuscle

Answer 27

These receptors adapt slowly to pressure that results in stretching of the skin. They record the sustained presence of pressure on the skin

Question 28

Pacinian corpuscle

Answer 28

Acts as a receptor for pressure and vibration

Question 29

Free nerve ending

Answer 29

Sensitive to painful stimuli, to hot and cold, and to light touch

Question 30

Malleus

Answer 30

Transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear. First of the 3

Question 31

Incus

Answer 31

The incus transmits vibrations from the malleus to the stapes. Is the middle of the three

Question 32

Stapes

Answer 32

Drives the fluid in the cochlea, producing a traveling wave along the basilar membrane

Question 33

Cochlea

Answer 33

In the cochlea, It transforms sound waves into electrical impulses which are sent on to the brain

Question 34

Cornea

Answer 34

Window that controls and focuses the entry of light into the eye and two-thirds of eye focusing power

Question 35

Pupil

Answer 35

Controlling the amount of light entering the eye, and hence the light reflex

Question 36

Iris

Answer 36

Iris controls the amount of light that enters the eye by opening and closing the pupil

Question 37

Retina

Answer 37

Receive light from the lens, convert it to neural signals and transmit them to the brain for visual recognition

Question 38

Lens

Answer 38

Lens is to transmit light, focusing it on the retina

Question 39

Farsighted

Answer 39

Farsighted means you can’t see things clear when close but can see things clear from far

Question 40

Nearsighted

Answer 40

Nearsighted is when you can see close things clearly and can’t see clear from far