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1.1 SENSORY ORGANS

Sensory Organs, Senses and Stimuli (pg. 3-4, 103)

1) Stimuli is _____________________________________________________________Examples of stimuli are __________________________________________________

2) Sensory Organs is ______________________________________________________

3) Relation between sensory organs, stimuli and senses in human beings.

Sensory Organs Stimulus/stimuli detected SenseTE SENSE OF SIGHTE SOUNDNS SENSE OF TOUCH

Response to stimuli (pg. 4)

4) Response is [pg. 103] __________________________________________________________5) Receptors are [pg. 103]_________________________________________________________

____________________________________________________________________________6) Nerve impulse are [pg. 102]______________________________________________________

____________________________________________________________________________7) Effectors are [pg. 4] ___________________________________________________________8) Common pathway on detecting a stimulus and producing a response in human beings:

Stimulus

Response

Senses in humans [pg. 3]

Nerve impulse

Brain

Nerve impulse

Nerve impulseNerve impulse

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1.2 SENSE OF TOUCH (pg. 5-7)

1) The skin is the sensory organ for touch.2) The skin can detect changes in ______________________________________________________3) The skin consists of two main layers, the _____________________ and the __________________4) The epidermis is ________________________________________________________________5) The dermis _____________________________________________________________________6)

7) The skin has special receptors to detect each of these stimuli (pg. 6)

8) When the _____________ in the skin ___________________, they send _______________ along the ________ to the brain. __________ interprets the impulses as the _______________________.

9) Sensitivity of the skin (pg. 7)The sensitivity of the skin depends on ________________________________________________

_______________________________________________________________________________.

HOMEWORK : PLEASE DO CHECKPOINT 1.1[pg. 5] & 1.2 [pg. 8 ]

PMR PRACTICE!

1.3 SENSE OF SMELL [pg. 8]

1) Cross section of the human nose:

Receptors in the skin Type of stimuli detecteda)b)c)d)e)

3. Which of the following sensory organs detect chemical stimuli?

A The eye and the earsB The ears and the noseC The eyes and the tongueD The nose and the tongue

2. The sensory receptors that are not present in the skin are the

A Heat receptorsB Pressure receptorsC Touch receptorsD Sweat receptors

1. Which of the following substances cannot be detected by the receptors on the tongue?

A SaltB Sugar C Chili D Vinegar

Nerve to the brain

Layer of mucus

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2) The two holes in our nose, called ____________, open into a hollow space called the _________________.

3) The nasal cavity is lined with mucous. The mucous lining ________________________________ _______________________________________________________________________________

4) The roof of the nasal cavity has many ____________________________________ to detect smell.5) How smells are detected:

a. When air is breathe in ______________________________________________________________________________________________________________________________________________________________________________________________________

6) If we smell something for a long time, the sensory cells __________________________________________________________________________. The sensitivity to smell varies with individuals.

7) Smell pathway from stimulus to the brain.

HOMEWORK : PLEASE DO CHECKPOINT 1.3 [pg. 9]

PMR PRACTICE!

1.4 SENSE OF TASTE [pg. 9-11] 1) The sensory organ for taste is the ____________________2) Our tongue can detect four basic tastes: _______________________________________________3) Different areas of the tongue are _____________________________________________________4) Our tongue is lined with __________________ which contains many _______________________

Chemicals in the air

Brain

6. Why does a person with a cold find his food tasteless?

A He is too tired and sleepy.B His medicine causes this

side effectC His sense of sight is

effected by his coldD His sense of smell is

affected by his cold. The sense of smell helps the sense of taste.

4. The part labeled as P is the

A NostrilB Mucous layerC Nasal cavityD Nerve

5. The mucous layer in the walls of the nasal cavity

A Contains the smell receptors

B Dissolves the chemicals that carry the smell

C Transmits the impulses to the brain

D Blocks the flow of air in the nasal cavity

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5) Label the taste areas on the tongue:

6) Our ___________________ improves our ______________________7) As we chew, ____________________________________________________________________

______________________________________________________________________________________________________________________________________________________________These chemicals _________________________________________________________________

8) Taste pathway from the stimulus to the brain:

9) Do you notice that food is tasteless when you have a cold? [pg. 11]This is because smell from the food _______________________________________________________________________________________________________________________________________________________________________________________________________________

PMR PRACTICE!

1.5 SENSE OF HEARING [pg. 12-14] 1) The _____ is the sensory organ of _______________________2) Most of the ear are situated in the ________________________3) Each part of the ear carries out a specific function. What are their functions?

Taste pore

Epithelialpore

Chemicals in the food

Brain

8.Sea water

Ice cream

Lime juice

A P Q SB P Q RC Q P RD S Q P

7. An accident victim has lost his sense of smell. He is unable to determine the taste of the food he eats because

A The nostrils do not have a mucous lining

B The sense of smell improves the sense of taste

C The taste buds are destroyedD The nerve connecting the taste

buds to the brain is damaged

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4) Label Name of the part Function

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(i)

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HOW DO WE HEAR?

PMR PRACTICE!9) & 10)

Brain

Ear Pinna

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1.6 SENSE OF SIGHT [pg. 14-18] 1) The sense of sight is very important to us. We can obtain a lot of information about an object with

just a glance at it – its ______________, ________________, _________________ and colour.2) The ______ are the sensory organ of sight. They are sensitive to light.3) Each eye is a ________________4) The eyelid, a ________________________________________5) The eyeball is held in _________________________________6) The wall of the eyeball is made up of three layers: _________, ___________, and the __________7)

8) State the function of each part of the structure of human eye.Structure Function

Retina

Choroid

ScleraIris

(n)

(o)

(m)

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Ciliary body

Lens

Optic nerve

Conjunctiva

Cornea

Aqueous humour

Vitreous humour

Suspensory ligaments

Yellow spot

Blind spot

Pupil

9) Complete the flow chart below to show the path of light from the cornea in the eye to the brain.

HOMEWORK : Describe how our eyes work? [pg.18]

PMR PRACTICE!

Brain

Cornea

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no. 11 and 12

1.7 LIGHT AND SIGHT [pg. 19- 26]

REFLECTION OF LIGHT1) Reflection of light occurs __________________________________________________________2)

‘PROPERTIES OF LIGHT’(a) Light is form of energy(b) Light travels in a straight line(c) Light reflects(d) Light refracts

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3) EXAMPLES:a.

4) EXERCISES:a) normal b) normal

60o

45o

Angle of incidence: ________ Angle of incidence: ________

Angle of reflection: ________ Angle of reflection: ________

REFRACTION OF LIGHT1) Refraction of light is the bending _________________________________________________2)

3) Light is refracted __________ the normal when light travels from a medium of low density to a medium of high density.

4) Light is refracted __________ from the normal when light travels from a medium of high density to a medium of low density.

5) PMR PRACTICE! : no. 13, 14 and 15

incident ray

incident ray

incident ray

incident ray

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DEFECTS OF VISION AND CORRECTIVE MEASURES

LONG-SIGHTEDNESS SHORT-SIGHTEDNESS

a) Person can see ______________________________________________________________

b) Light from _________________________________________________________________

c) This is either because ________________________________________________________

a) Person can see ______________________________________________________________

b) Light from _________________________________________________________________

c) This is either because ________________________________________________________

DOA AGAR BERJAYA DLM PELAJARAN DAN MENGEJAR CITA-CITA:

“Ya Tuhan kami! Kurniakanlah kami rahmat dari sisiMu, dan sediakanlah petunjuk untuk kami dalam menyelesaikan urusan kami.”

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Can be corrected by using ______________ lens Can be corrected by using ______________ lens

ASTIGMATISMa) Caused by _________________________________________________________________________b) Corrected by _______________________________________________________________________

BLIND SPOTa) When images fall on the ______________. They ___________________________b) Caused by there are no _________________________c) Activities 1.12 B [pg. 24]

i. Follow the instruction in textbook pg. 24ii. Write down your observation:

Observation :____________________________________________________________________________________________________________________________________________

OPTICAL ILLUSIONSa) The limitation of the sense of sight where the brain

cannot interpret accurately what is actually seen by the eye.

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b)

c) PMR PRACTICE! : no. 16

STEREOSCOPIC AND MONOCULAR VISION [pg. 25]STEREOSCOPIC VISION

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MONOCULAR VISION

Uses eye to look at object

Eyes located

Field of vision

overlapping

Stimate distance

Advantages

EXERCISE:Based on the animal pictures below, state the type of vision these animals have.

Type of vision: ________________ Type of vision: _______________

Type of vision: ________________ Type of vision: ______________

DEVICES USED TO OVERCOME THE LIMITATIONS OF SIGHT

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The various devices used to overcome the limitation of sight include: [pg. 25]i) _____________________________ v) ________________________________ii) _________________________ vi) ________________________________iii) __________________________ vii) ________________________________iv) _____________________________ viii) ________________________________

PMR PRACTICE! No. 17 and 18.

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1.8 SOUND AND HEARING [pg. 27- 31]

1) Sound are produced by ________________________2) Sound needs a ___________ to travel. 3) Sound can travel through ____________, _____________ and ________________4) When sound hits a surface, it can be _______________ or ________________.5) ____________ and ___________________ like walls are good reflectors of sound.6) ____________ and ___________________ like curtains are good absorbers of sound.7) Reflected sound is called an ____________.Echo can be used to:

a. Estimate the depth of seab. Identify the school of fishc. Detect the presence of submarine

8) There are two major types of hearing loss. The first type involves the ________ and ________ ear.9) It usually results from ____________________________________________________________10) The damage is often _____________________________________________________________

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11) The second type involves damage to the __________________12) It can be caused by the ____________________________________________________________

_______________________________________________________________________________13) In such cases, ___________________________________________________________________14) This type of hearing loss cannot be __________________________________________________

LIMITATIONS OF HEARING1) Our ear can only detect sounds between _____________________________2) As we grow older, ______________________________________________3) There is also a limit to how far our ear is able to her sound from a distance. We

cannot_________________________________________________________________________4) We can overcome the limitations using devices such as _____________________________________

__________________________________________________________________________________

STEREOPHONIC HEARING1) Stereophonic hearing is _______________________________________________________________2) Stereophonic hearing enable us to ______________________________________________________

PMR PRACTICE! No. 19

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1.9 STIMULI AND RESPONSES IN PLANTS [pg. 32-35] 1) Tropism is ______________________________________________________________________2) When the part of the plant grows towards the stimulus, it is called _________________________3) When the part of the plant grows away from the stimulus, it is called _______________________4) Tropism responses include:

Type of tropism Stimulus Response (+/-)Light

Gravity

Water

Touch

Touch

PMR PRACTICE! no. 20

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1.10 SUMMARY CHART

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