Intervensi biology Form 4 chapter 6

1. INTERVENTION – BIOLOGY CHAPTER 6
CHAPTER 6 : NUTRITION
1. The figure below shows the human digestive system.
P
R
T
U V
( i ) Label structures M – T.
M
N
O
Q
S
M : …………………………………. N : ……………………………………….
O : ………………………………….. P : ………………………………………
Q : ………………………………….. R : ………………………………………
S : ………………………………….. T : ……………………………………….
U : …………………………………... V : ……………………………………….
( ii ) Which structure produces enzymes for the hydrolysis of lipids.
…………………………………………………………………………………………
( iii ) Which region absorbs most water from its contents .
………………………………………………………………………………………..
( iv ) Which region has the largest surface area for absorbtion of food.
……………………………………………………………………………………….

2. INTERVENTION – BIOLOGY CHAPTER 6
( v ) Complete the equations below.
1.
Digestion in the mouth.
__________________ + water maltose
2.
3.
Digestion in the stomach
salivary
amylase
pepsin
__________________ + water polypeptides
Soluble Caseinogen Insoluble Casein
(Pepsin will hydrolysed the protein casein into polypeptides)
4.
5.
6.
7.
8.
9.
Digestion in the small intestine
(a) Duodenum
lipase
Lipid + water fatty acids + _______________
pancreatic
amylase
trypsin
__________________ + water maltose
Polypeptides + water ___________________
(b) Ileum
erepsin
Peptides + water ___________________
maltase
Maltose + water ___________________
lactase
Lactose + water ____________ + ____________

3. INTERVENTION – BIOLOGY CHAPTER 6
2. The figure below shows the longitudinal section of a villus in the small intestine.
V
(a) Name the parts labelled V, W and X.
X
W
V : …………………………………………………………………………………
W : ………………………………………………………………………………...
X : …………………………………………………………………………………
(b) State the function of V and W.
V : …………………………………………………………………………………..
W : ………………………………………………………………………………….
(c) State two structural features of the villus to help it function efficiently.
( i ) ………………………………………………………………………………...
( ii ) ………………………………………………………………………………..
(d) Name two nutrients found in X .
( i ) ………………….……………. ( ii ) ……………………………………….
(e) Name the process by which food is absorbed across the wall of the ileum.
…………………………………………………………………………………….

4. INTERVENTION – BIOLOGY CHAPTER 6
3. The figure below shows a section through the leaf lamina of a dicotyledonous plant.
Figure 4
(a) Name the parts labelled A, B, C, D, E, F.
A : ………………………………… B : ……………………………………..
C : ………………………………….D : …………………………………….
E : ………………………………….F : …………………………………….
(b) State the function of A , C and F.
A : …………………………………………………………………………………
C : …………………………………………………………………………………
F : …………………………………………………………………………………
(c) State two differences between the light reaction and the dark reaction.
Light reaction Dark reaction
A
B
C
D
E
F