Life Processes
Saliva in the mouth converts ________ into _________ .
proteins, amino acids
glycogen, glucose
starch, maltose
fats, vitamins
starch, maltose
Saliva contains the enzyme salivary amylase. It breaks down starch into simpler molecules such as maltose. Starch is a polysaccharide made up of many units of glucose. Maltose, on the other hand is a disaccharide produced when starch is broken down by amylase.
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The process of obtaining food to meet the energy demands of the body is known as:A. excretion
B. respiration
C. nutrition
D. circulation
The process involving oxidation of food to release energy is known as _________ .
A. breathing
B. excretion
C. circulation
D. respiration
What is the function of the sac-like structures present at the end of bronchioles?
A. Storage of respiratory gases
B. Exchange of respiratory gases
C. Protection of lungs
D. Protection from bacteria
Exchange of gases in alveoli occurs through:
A. absorption
B. dialysis
C. diffusion
D. anaerobic respiration
The process of digestion of food starts in the:
A. mouth
B. stomach
C. small intestine
D. oesophagus
The smallest blood vessel of the circulatory system is known as the:
A. artery
B. vein
C. capillary
D. aorta
Where does digestion of proteins take place?
A. Stomach only
B. Stomach and small intestines
C. Stomach and large intestines
D. Large intestines only
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