📚 Biology unit 5
Instructions: Choose the best answer for each question.
1. In which part of the digestive system does the majority of nutrient absorption occur?
a) Stomach
b) Esophagus
c) Small intestine
d) Large intestine
2. Which enzyme, produced in the mouth, initiates the chemical digestion of carbohydrates?
a) Pepsin
b) Lipase
c) Amylase
d) Trypsin
3. What is the primary function of the villi in the small intestine?
a) To secrete digestive enzymes
b) To increase the surface area for absorption
c) To produce bile
d) To store undigested food
4. Which blood vessels carry deoxygenated blood back to the heart?
a) Arteries
b) Veins
c) Capillaries
d) Aorta
5.The pulmonary circuit of blood flow involves the movement of blood between the:
a) Heart and body tissues
b) Heart and lungs
c) Kidneys and heart
d) Liver and heart
6. Which component of blood is responsible for transporting oxygen?
a) Plasma
b) White blood cells
c) Platelets
d) Red blood cells
7.What is the primary function of the lymphatic system?
a) Transporting oxygen
b) Filtering blood
c) Returning interstitial fluid to the bloodstream
d) Digesting fats
8.Lymph nodes are responsible for:
a) Producing red blood cells
b) Filtering lymph and housing immune cells
c) Secreting digestive enzymes
d) Storing glucose
9.Which of the following is NOT a function of the liver in digestion?
a) Producing bile
b) Storing glycogen
c) Absorbing nutrients
d) Detoxifying substances
10.The process of peristalsis aids in:
a) Emulsifying fats
b) Absorbing water
c) Moving food through the digestive tract
d) Secreting enzymes
11. What is the role of the epiglottis during swallowing?
a) To initiate chemical digestion
b) To prevent food from entering the trachea
c) To absorb nutrients
d) To produce saliva
12.Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Left atrium
c) Right ventricle
d) Left ventricle
13. What is the function of platelets in the blood?
a) Fighting infection
b) Transporting hormones
c) Clotting blood
d) Carrying nutrients
14.Which of the following is a major component of lymph?
a) Red blood cells
b) Plasma proteins
c) White blood cells
d) Digestive enzymes
15. The enzyme pepsin, found in the stomach, is responsible for the breakdown of:
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids
1. c) Small intestine
2. c) Amylase
3. b) To increase the surface area for absorption
4. b) Veins
5.b) Heart and lungs
6..d) Red blood cells
7.. c) Returning interstitial fluid to the bloodstream
8.. b) Filtering lymph and housing immune cells
9. c) Absorbing nutrients
10.c) Moving food through the digestive tract
11. b) To prevent food from entering the trachea
12. b) Left atrium
13 .c) Clotting blood
14 .c) White blood cells
15. c) Proteins
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Instructions: Choose the best answer for each question.
1. In which part of the digestive system does the majority of nutrient absorption occur?
a) Stomach
b) Esophagus
c) Small intestine
d) Large intestine
2. Which enzyme, produced in the mouth, initiates the chemical digestion of carbohydrates?
a) Pepsin
b) Lipase
c) Amylase
d) Trypsin
3. What is the primary function of the villi in the small intestine?
a) To secrete digestive enzymes
b) To increase the surface area for absorption
c) To produce bile
d) To store undigested food
4. Which blood vessels carry deoxygenated blood back to the heart?
a) Arteries
b) Veins
c) Capillaries
d) Aorta
5.The pulmonary circuit of blood flow involves the movement of blood between the:
a) Heart and body tissues
b) Heart and lungs
c) Kidneys and heart
d) Liver and heart
6. Which component of blood is responsible for transporting oxygen?
a) Plasma
b) White blood cells
c) Platelets
d) Red blood cells
7.What is the primary function of the lymphatic system?
a) Transporting oxygen
b) Filtering blood
c) Returning interstitial fluid to the bloodstream
d) Digesting fats
8.Lymph nodes are responsible for:
a) Producing red blood cells
b) Filtering lymph and housing immune cells
c) Secreting digestive enzymes
d) Storing glucose
9.Which of the following is NOT a function of the liver in digestion?
a) Producing bile
b) Storing glycogen
c) Absorbing nutrients
d) Detoxifying substances
10.The process of peristalsis aids in:
a) Emulsifying fats
b) Absorbing water
c) Moving food through the digestive tract
d) Secreting enzymes
11. What is the role of the epiglottis during swallowing?
a) To initiate chemical digestion
b) To prevent food from entering the trachea
c) To absorb nutrients
d) To produce saliva
12.Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Left atrium
c) Right ventricle
d) Left ventricle
13. What is the function of platelets in the blood?
a) Fighting infection
b) Transporting hormones
c) Clotting blood
d) Carrying nutrients
14.Which of the following is a major component of lymph?
a) Red blood cells
b) Plasma proteins
c) White blood cells
d) Digestive enzymes
15. The enzyme pepsin, found in the stomach, is responsible for the breakdown of:
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic acids
1. c) Small intestine
2. c) Amylase
3. b) To increase the surface area for absorption
4. b) Veins
5.b) Heart and lungs
6..d) Red blood cells
7.. c) Returning interstitial fluid to the bloodstream
8.. b) Filtering lymph and housing immune cells
9. c) Absorbing nutrients
10.c) Moving food through the digestive tract
11. b) To prevent food from entering the trachea
12. b) Left atrium
13 .c) Clotting blood
14 .c) White blood cells
15. c) Proteins
@Ethioquizzes
@Ethiomatrichub
@Ethiomatrics