Chapter 1 Stimuli And Responses

Question 1

The Brain and Spinal Cord is located in?

Answer 1

Central Nervous System

Question 2

Where are the Cranial NERVES and Spinal NERVES located in?

Answer 2

Peripheral Nervous System

Question 3

MAIN Function of the Human Nervous System (1m)

Answer 3

Control and Coordinates organs and parts of the body

Question 4

Functions of the human nervous sytem

Answer 4

Detects stimuli and send information in the form of impulses

Question 5

What are voluntary actions?

Answer 5

are Conscious actions that are conducted under one’s will

Question 6

Voluntary actions are controlled by what?

Answer 6

Brain

Question 7

Examples of voluntary actions

Answer 7

Reading, Writing, Speaking

Question 8

What are involuntary actions?

Answer 8

Actions that occur immediately WITHOUT conscious control or prior thoughts

Question 9

What part of the body controls the involuntary actions?

Answer 9

Medulla Oblongata and Spinal Cord

Question 10

Actions that involve medulla oblongata

Answer 10

Heartbeat, breathing, peristalsis

Question 11

Actions that involve spinal cord

Answer 11

Withdrawing hand when touching a hot object
Sneezing wwhen dust enters nose

Question 12

Importance of the human nervous system

Answer 12

Carry out processes in the body such as breathing and body movements

Question 13

What are the 5 sensory organs?

Answer 13

Eyes, ear, nose, tongue, skin

Question 14

What are the photoreceptors in the retina?

Answer 14

Rod cells
Cone cells

Question 15

Explain more about rod cells and cone cells

Answer 15

Rod cells are sensitive to different light intensities but are not sensitive to colours of light while cone cells are sensitive to colour of lights under bright conditions

Question 16

what are the different types of cone cells?

Answer 16

Red, green and blue light

Question 17

Job of earlobe

Answer 17

Collects and directs sound waves into the ear canal

Question 18

Job or ear canal

Answer 18

Directs sound waves into the ear drumJ

Question 19

Job of eardrum

Answer 19

Vibrates according to the frequency of the sound waves received and transfers the vibrations to the ossicles

Question 20

Job of ossicles

Answer 20

Amplify sound vibrations and transfer them to the oval window

Question 21

Job of oval window

Answer 21

Collects and transfer sound vibrations from ossicles to the cochleaJ

Question 22

Job of eustachian tube

Answer 22

Balances the air pressure on both sides of the eardum

Question 23

Job of cochlea

Answer 23

Detects and converts sound vibration into nerve impulses

Question 24

Job of Semicircular canals

Answer 24

Detects the positions of the head and help to balance the body

Question 25

Job of Auditory nerve

Answer 25

Send nerve impulses from the cochlea to the brain to be interpreted

Question 26

What are smells?

Answer 26

Chemical subtances present in the air

Question 27

What is the fucntion of sensory cells for smell?

Answer 27

Sensory cells for smell are tiny and covered with a layer of mucus. Chemical substances in the air will dissolve in this layer of mucus and stimulate cells to produce nerve impulses to the brain to be interpreted

Question 28

What are the tiny nodules on the tongue known as?

Answer 28

Papillae

Question 29

what are the papillae covered in?

Answer 29

Taste buds

Question 30

Function of taste buds?

Answer 30

when food is chewed, chemical substances in food dissolve in saliva and diffuse into the taste buds to stimulate taste receptors and produce nerve impulses

Question 31

Types of receptors in the skin?

Answer 31

Pain, cold, heat, touch and pressure receptor`

Question 32

How does the skin function?

Answer 32

when receptors on the skin are stimulated, nerve impulses are produced and sent through the nervous system to be interpreted

Question 33

mechanism of hearing

Answer 33

Earlobe, ear canal, eardrum, ossicles, oval window, cochlea, auditory nerve, brain

Question 34

Examples of limitations of sigh

Answer 34

Optical Illusions and blind spots

Question 35

How does an optical illusion occur?

Answer 35

when an object seen differs from its actual state

Question 36

what causes astigmatism?

Answer 36

Caused by the uneven curvature of the cornea and eye lens

Question 37

How to correct astigmatism

Answer 37

Cylindrical Lenses

Question 38

What causes short sightedness?

Answer 38

Eye lens too thick or eye ball too long

Question 39

How to correct short sightedness?

Answer 39

Concave lenses

Question 40

What causes long sightedness?

Answer 40

Eye lens too thin or eye ball too short

Question 41

How to fix long sightedness?

Answer 41

Convex lens

Question 42

Frequency of human ears?

Answer 42

20 - 20000 Hz

Question 43

How does age affect the frequency range of hearing?

Answer 43

The older the person, the lower the frequency range of the person

Question 44

How does loudspeaker work?

Answer 44

Amplifies sound to be heard from far away

Question 45

What are examples of responses in plants?

Answer 45

Tropism and Nastic Movement

Question 46

What is tropism

Answer 46

Directional response of plants to stimuli

Question 47

Examples of tropism

Answer 47

Geotropism Hydrotropism Phototropism Thigmotropism

Question 48

What is nastic movement

Answer 48

Response towards a stimulus but does not depend on the direction of the stimulus

Question 49

What is stereophonic hearing

Answer 49

Hearing using both ears

Question 50

Importance of stereophonic hearing

Answer 50

Determine location of a source of sound