Page 28 - Amali Proses Sains T3 (EG)

Sains Tingkatan 3 PBD Bab 1

Perbincangan 1. Lengkapkan jadual berikut bagi membanding bezakan kepekaan kulit terhadap sentuhan.
Discussion Complete the following table to compare the differences in skin sensitivity to touch. SP 1.2.3 TP 2

Sangat peka Kepekaan Kurang peka
Very sensitive Sensitivity Less sensitive

Leher, hujung jari, bibir, Siku, lutut, tapak kaki, tapak
Bahagian-bahagian badan
belakang telinga Parts of the body tangan
Neck, fingertip, lip, back of the ear Elbow, knee, sole of foot, palm

Banyak Bilangan reseptor Sedikit
A lot / many Number of receptors Less

Tebal Ketebalan lapisan epidermis Nipis
Thick Thickness of epidermal layer Thin

2. Nyatakan jenis reseptor yang dirangsangkan dalam aktiviti ini. SP 1.2.3 TP 2
State the type of receptor that is stimulated in this activity.
Reseptor sentuhan / Touch receptor

3. Tunjukkan laluan impuls melalui saraf setelah suatu rangsangan dikesan oleh kulit.
Show the pathway of an impulse through the nerves after a stimulus is detected by the skin. SP 1.2.3 TP 2
i-THINK Peta Alir

Rangsangan (a) Reseptor (b) Saraf (c) Otak
Stimulus Receptor Nerve Brain
Pentaksiran Bilik Darjah Penerbitan Pelangi Sdn. Bhd.

(e) Efektor
Gerak balas
(d) Saraf
Response

Effector
Nerve

4. Gariskan jawapan yang betul. SP 1.2.3 TP 3 KBAT Mengaplikasi
Underline the correct answers.
(a) Orang buta menggunakan hujung jari untuk membaca tulisan
Braille kerana bahagian ini mempunyai lapisan epidermis yang
(tebal, nipis) dan (kurang, banyak) reseptor.
Blind people use the fingertips to read the Braille script because this part has
a (thick, thin) epidermal layer and (less, many) receptors.

(b) Pesakit biasanya diberikan suntikan pada lengan kerana
bahagian kulit ini mempunyai lapisan epidermis yang (tebal,
nipis) dan (kurang, banyak) reseptor.
Patients are usually given injection on the arm because the skin of this part has a
(thick, thin) epidermal layer and (less, many) receptors.

Kesimpulan Kulit pada bahagian badan yang berlainan mempunyai kepekaan yang berbeza
Conclusion
terhadap rangsangan.
The skin at different parts of the body have different sensitivity towards stimuli.

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