Page 6 - Module & More Biology F4

Biologi Tingkatan 4 Bab 9 Nutrisi dan Sistem Pencernaan Manusia
2. Simpan tabung uji dalam kukus air 37°C.
Keep the test tubes in water bath at 37°C.
3. Perhatikan kekeruhan dalam setiap tabung uji pada permulaan eksperimen dan selepas 20 minit.
Observe the turbidity of each test tube at the beginning of the experiment and after 20 minutes.

Pemerhatian Keadaan kandungan / Condition of content
Observation Tabung Uji
Test tube 0 minit / 0 minute 20 minit / 20 minute

A Keruh / Cloudy Jernih / Clear

B Keruh / Cloudy Keruh / Cloudy

Perbincangan 1. Apakah fungsi asid hidroklorik 0.1 M dalam tindak balas ini?
Discussion What is the function of 0.1 M hydrochloric acid?
Sediakan medium berasid. Aktiviti pepsin adalah optimum dalam medium berasid.
Provide the acidic medium. The activity of pepsin is optimum in an acidic medium.
2. Ramal dan terangkan pemerhatian anda jika larutan natrium hidroksida 0.1 M menggantikan asid
hidroklorik 0.1 M dalam tabung uji A.
Predict and explain your observation if hydrochloric acid 0.1 M is replaced with sodium hydroxide 0.1 M in test
tube A.
Ampaian keruh tidak berubah. Pepsin tidak aktif dalam medium beralkali.
The cloudy suspension remains unchanged. Pepsin is inactive in alkaline medium.

Kesimpulan Hipotesis diterima. Enzim pepsin menghidrolisis protein dalam ampaian albumen kepada polipeptida .
Conclusion
The hypothesis is accepted. Pepsin hydrolyses protein in albumen suspension into polypeptides .

9 9.3 Penyerapan
Absorption
Struktur vilus dalam ileum TP 1
The structure of a villus in the ileum iluem
BAB • Penyerapan nutrien berlaku di ileum . .

Absorption of nutrients occurs at
f Mikrovilus / Microvilli

b d g Sel epitelium
Ileum Kapilari darah
a Ileum Blood capillary Epithelial cells
Usus kecil c
Small intestine Vilus e h
Villi Lakteal
Lacteal Sel goblet
Goblet cell
i
Kelenjar usus
Intestinal gland

Vilus / Villus

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