Page 53 - Biology Form Two

Biology for Secondary Schools

Column A Column B
(vi) Oesophagus F. An enzyme that converts lactose to
glucose and galactose
(vii) Bolus
G. An organ that secretes pancreatic
FOR ONLINE READING ONLY
(viii) Peristalsis juice in the duodenum
H. The break down of food into tiny
(ix) Cardiac sphincter particles by using enzymes

(x) Ileum I. An enzyme that converts sucrose to
glucose and fructose
J. The break down of food into small
particles during chewing by teeth

2. (a) Which specific stomach enzymes are most effective at digesting the
proteins found in fish and milk?

(b) How do these enzymes work to break down these foods?

3. (a) How do incisors contribute to effective consumption of meat in human
beings?

(b) Explain the adaptive features of incisors to the role they perform in 3 (a)

Absorption in the small intestine soluble, absorbable, and usable food

molecules. Foods with mineral sources
Task 2.4
are broken and finally release mineral
Search the library and internet sources for elements such as potassium, sodium, iron,
animations about absorption in the small magnesium, iodine, calcium, chloride,
intestine and their assimilation into the fluoride, and nitrate, as shown in Table

body systems. Observe the animations. 2.2. Therefore, vitamins and minerals are
Then, describe the process. released to the body as the food is being

digested. For example, the digestion of
The overall process of digestion involves meat will release amino acids together

the break down of large and complex food with mineral salts.
substances into small, simple, digestible,

Student’s Book - Form Two 47

05/10/2024 15:36:23
BIOLOGY FORM 2 NEW.indd 47 05/10/2024 15:36:23
BIOLOGY FORM 2 NEW.indd 47