Page 76 - Hybrid PBD Sains TG1_Edisi Guru

Sains Tingkatan 1 Bab 3
2. Lengkapkan rajah mekanisme pembetulan bagi kawal atur kandungan air berikut. SP 3.1.2 TP2
Complete the following corrective mechanism diagram for the water content regulation. Nota Visual
Kawal Atur Kandungan Air
Aras air normal Water Content Regulation
Normal water level

(c) Banyak air kencing dihasilkan Minum sedikit air
(c) More urine is produced Drink less water

(b) Otak merangsang supaya Kandungan air dalam badan (d) berkurangan
hormon dirembeskan Water content in the body (d) decreases

The (b) brain stimulates hormone secretion

Kandungan air dalam badan (a) meningkat (e) Otak merangsang supaya hormon
Water content in the body (a) increases dirembeskan
The (e) brain stimulates hormone secretion

Minum banyak air (f) Kurang air kencing dihasilkan
Drink plenty of water
(f) Less urine is produced

Aras air normal
Normal water level

3. Rajah menunjukkan mekanisme pembetulan bagi mengawal atur suhu
badan. SP 3.1.2 TP2 Modul HEBAT 11
The diagram shows the corrective mechanism to regulate the body temperature.
Dalam jadual berikut, tandakan (3) bagi jawapan yang betul.
In the following table, mark (3) the correct answers.
Nota Visual
Kawal Atur Suhu Badan
Body Temperature Regulation
Mekanisme pembetulan Pada hari sejuk Pada hari panas
Corrective mechanism During cold day During hot day
(a) Bulu roma condong untuk mengurangkan haba dalam udara
daripada diperangkap. 3
Hairs lie flat to reduce the heat in the air from being trapped.

(b) Salur darah mengecut dan darah mengalir menjauhi kulit.
Blood vessels constrict and the blood flows away from the skin. 3

(c) Kelenjar peluh menghasilkan lebih banyak peluh. Lebih banyak
haba disingkirkan. 3
Sweat glands produce more sweat. More heat is removed.
(d) Otot rangka mengecut dan mengendur secara aktif bagi
meningkatkan penghasilan haba. 3
Skeletal muscles contract and relax actively to increase heat production.
(e) Sedikit air kencing dihasilkan disebabkan banyak kehilangan air. 3
Less urine is produced due to a lot of water loss.

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