One Mark Questions Answers

ORGAN SYSTEMS IN ANIMALS

TEXT BOOK EXERCISES

I. Choose the correct answer :

1. Which of the following is not a salivary gland?

(a) Sublingual

(b) Lachrymal

(c) Submaxillary

(d) Parotid

[Answer: (b) Lachrymal]

2. Stomach of human beings mainly digests _――― .

(a) carbohydrates

(b) proteins

(c) fat

(d) sucrose

[Answer: (b) proteins]

3. To prevent the entry of food into the trachea, the opening is guarded by _――― .

(a) epiglottis

(b) glottis

(c) hard palate

(d) soft palate

[Answer: (a) epiglottis]

4. Bile helps in the digestion of _――― .

(a) proteins

(b) sugar

(c) fats

(d) carbohydrates

[Answer: (c) fats]

5. The structural and functional unit of the kidney is _――― .

(a) villi

(b) liver

(c) nephron

(d) ureter

[Answer: (c) nephron]

6. Which one of the following substance is not a constituent of sweat?

(a) Urea

(b) Protein

(c) Water

(d) Salt

[Answer: (b) Protein]

7. The common passage meant for transporting urine and sperms in male is _――― .

(a) ureter

(b) urethra

(c) vas deferens

(d) scrotum

[Answer: (c) vas deferens]

8. Which of the following is not a part of female reproductive system?

(a) Ovary

(b) Uterus

(c) Testes

(d) Fallopian tube

[Answer: (c) Testes]

II. Fill in the blanks :

1. The opening of the stomach into the intestine is called pylorus .

2. The muscular and sensory organ which helps in mixing the food with saliva is tongue _.

3. Bile, secreted by liver is stored temporarily in gall bladder.

4. The longest part of alimentary canal is ileum.

5. The human body functions normally at a temperature of about 37°C _.

6. The largest cell in the human body of a female is ovum .

III. State whether true or false. If false, correct the statement.

1. Nitric acid in the stomach kills microorganisms in the food.

Answer: False.

Correct statement: Hydrochloric acid in the stomach kills micro-organisms in the food.

2. During digestion, proteins are broken down into amino acids.

Answer: True.

3. Glomerular filtrate consists of many substances like amino acids, vitamins, hormones, salts, glucose and other essential substances.

Answer: False.

Correct statement: Hormones are not present in glomerular filtrate.

IV. Match the following :

Organ - Elimination

1. Skin - (a) Urine

2. Lungs - (b) Sweat

3. Intestine - (c) Carbon dioxide

4. Kidneys - (d) Undigested food

Answer: 1-b, 2-c, 3-d, 4 - a 

Organ - Elimination

1. Skin - Sweat

2. Lungs - Carbon dioxide

3. Intestine - Undigested food

4. Kidneys - Urine