Layers of Skin

Q.

State the main function of abscisic acid.

Q.

Which layer of the epidermis contains dead cells?

1. Germinative layer
2. Granular layer
3. Cornified layer
4. Malpighian layer

Q. Skin contains receptors for ____________.

1. Touch
2. Pain
3. Bitterness
4. Temperature

Q. Which salt is mainly present in sweat?

1. Urea.
2. Sodium Chloride.
3. Ammonium Chloride.
4. Sodium Chlorite.

Q. All the following structures are present in the dermis, except?

1. Blood vessels
2. Nerve fibres
3. Hair follicles
4. Keratin

Q.

Write about movement due to growth in plants with one example.

Q. Which of the following is not a part of dermis?

1. Blood vessels
2. Small hairs
3. Sweat pores
4. Fat lobules

Q. How can we prevent exposure to air Borne infections , water borne infections and Vector Borne infections?

Q.

Why we can't find polar bears in South India? [5 MARKS]

Q.

Blood vessels are present in the ___ layer of the skin.

Q. Match the sensation to their corresponding sensory receptors in the skin

$\begin{array}{cc}\text{Sensation}& \text{Sensory receptors}\\ \left(a\right)\text{Temperature}& \left(i\right)\text{Nociceptor}\\ \left(b\right)\text{Touch}& \left(ii\right)\text{Pacinian corpuscle}\\ \left(c\right)\text{Pain}& \left(iii\right)\text{Thermoreceptor}\\ \left(d\right)\text{Pressure}& \left(iv\right)\text{Tactile receptor}\end{array}$

1. a-iv, b-ii, c-i, d-iii
2. a-ii, b-i, c-iii, d-iv
3. a-i, b-iii, c-iv, d-ii
4. a-iii, b-iv, c-i, d-ii

Q. How how the minimum body surface area help to reduce heat loss from the body of the polar bear

Q. Sweat helps in lowering the body temperature during hot weather.

1. True
2. False

Q.

Colouration of the skin is due to the pigment called___.

Q. Explain how sweating helps to cool the body.

Q.

what precautions should we take in school to reduce diseases??

Q. a.Label the three layers of the skin.
b.Which receptors are present in the skin?
c.Name three diseases that affect the skin.
d.What determines the colour of the skin? [5 Marks]

Q.

The growth of pollen tubes towards ovules is due to

1. Hydrotropism

2. Chemotropism

3. Geotropism

4. Phototropism

Q. Which among the following sensation is perceived by the Pacinian corpuscle?

1. Temperature
2. Pain
3. Touch
4. Pressure

Q. What precautions would you take to prevent skin diseases?

Q.

Which of the following problems is related to sebaceous glands?

1. Black head

2. Colour blindness

3. Albinism

4. Leucoderma

Q. Match the correct pair of adaptive features of a polar bear.

1. Layer of fat
2. Sharp claw
3. Thick white fur
4. Walking on ice
5. Gives warmth
6. Camouflage

Q. Our sensory organs are quite delicate organs, we should therefore take full care of them. Suggest, in brief, the ways in which we should take care of, the these organs.

Q.

________________ glands open into the hair follicle.

Q.

Name a bodily function that helps in regulating the body temperature and is also the cause of bad body odour.

Q. Which of the following consists dermis?

1. Sebaceous gland and sweat gland
2. Hair follicle
3. Blood vessel
4. All of the above

Q.

Ram conducted a survey in his neighbourhood and found out that most common disease namely dysentery, malaria, and jaundice occur in the locality very often. What steps of precautions should he suggest to the local authorities to bring down the incidence of these disease.

Q. Which among the following are present in the dermal layer of the skin?

1. Sweat glands
2. Sweat pores
3. Hair follicles
4. Small hairs

Q.

what is goose flesh?how is it formed?

Q.

__ is regularly lost from the body through sweat, urine, and as water vapour in the breath.