Functions of the Skin

Q. Children eating more fast food tend to suffer from obesity (overweight). Comment.

Q.

The pigment present in the cells of epidermis is called

Q. What are the different forms in which excretion takes place in plants?

Q. Skin protects the underlying tissues from mechanical shocks.

1. True
2. False

Q. Put a tick mark (✓) against the correct alternative in the following statements:​

Deficiency of Iodine in one’s food can cause:

1. Pellagra
2. Scurvy​
3. Beri-beri​
4. Goitre​

Q. Put a tick mark (✓) against the correct alternative in the following statements:​
(d)If the cotyledons are pushed above the ground, then such type of germination is called:​

​

1. Progeal​
2. Epigeal​
3. Hypogeal​
4. Perigeal​

Q. What are the functions of your skin? [Textbook Question 5a Pg no. 64]

Q.

Which of the following is not the excretory substance of animals?

1. Dung
2. Urine
3. Resin
4. Sweat

Q.

Assertion(A): Colouration of skin is due to a pigment melanin.

Reason(R): It protects the skin and inner parts from ultraviolet sunrays.

1. (A) is true and (R) is false
2. Both (A) are (R) are false
3. Both (A) and (R) are true and (R) explains (A)
4. Both (A) and (R) are true but (R) does not explain (A)

Q. The skin colour is determined by the amount of melanin in it.

1. True
2. False

Q. Melanin is present in which layer of skin?

1. Epidermis
2. Dermis
3. Subcutis
4. Hypodermis

Q. Given below are the images of different skin tonned individuals. Sort them in descending order of concentration of melanin.

1. (i), (ii), (iii), (iv)
2. (ii), (iv), (i), (iii)
3. (i), (iv), (ii), (iii)
4. (iii), (i), (iv), (ii)

Q. Which of the following vitamins are synthesised by the skin?

1. Vitamin A
2. Vitamin B
3. Vitamin C
4. Vitamin D

Q. Which vitamin is necessary for normal growth of eyes and skin?

1. Vitamin A
2. Vitamin B
3. Vitamin C
4. Vitamin D

Q.

Which of the following is not the excretory substance of animals?

1. Dung
2. Urine
3. Resin
4. Sweat

Q.

What is the function of vitamin C?