Nokea
Which substance of saliva destroy the harmful bacteria-
- A. Cerumin
- B. Chyme
- C. Lysozyme
- D. Secretin
Correct Answer: C
Rationale: Lysozyme in saliva has antibacterial properties, breaking down bacterial cell walls.
You may also like to solve these questions
A digestive enzyme, salivary amylase, in the saliva begin digestion of-
- A. Carbohydrates
- B. Protein
- C. Fats
- D. Nucleic acids
Correct Answer: A
Rationale: Salivary amylase (ptyalin) in saliva begins the digestion of carbohydrates by breaking down starches into simpler sugars like maltose.
The small intestine is held to the posterior abdominal wall by the:
- A. mesentery
- B. falciform ligament
- C. greater omentum
- D. lesser omentum
Correct Answer: A
Rationale: The mesentery supports and anchors the small intestine to the posterior abdominal wall.
The function of the parietal cells of the stomach is to:
- A. Secrete pepsinogen for protein digestion
- B. Secrete mucus for lubrication
- C. Secrete the hormone gastrin
- D. Produce intrinsic factor required for absorption of vitamin B12
Correct Answer: D
Rationale: Parietal cells produce intrinsic factor, essential for vitamin B12 absorption, and hydrochloric acid, not the other functions listed.
Substances which are not related with hepatic portal circulation :-
- A. Amino acid
- B. Fatty acid
- C. Glucose
- D. Electrolytes
Correct Answer: B
Rationale: Fatty acids are absorbed into lacteals and enter the lymphatic system, not the hepatic portal vein.
Teeth adapted to shear food are:
- A. premolars
- B. canines
- C. incisors
- D. molars
Correct Answer: C
Rationale: Incisors are sharp-edged teeth designed for cutting or shearing food.