Which of the below best describes keratinocytes in the stratum granulosum? Singl

Question

Which of the below best describes keratinocytes in the stratum granulosum?

Single layer of cuboidal cells

Up to 30 layers of flat, dead cells arranged in large sheets

Slightly flat cells with a smaller amount of keratin

Flat, alive, waterproof cells filled with large keratin bundles

Flat, dead, cells in a few layers; only in thick skin

Choose the answer that best describes the role that keratohyalin granules play in normal epidermal function.

Question 2 options:

Incredibly strong protein that bundles together to create a strong, protective layer.

Cause the bundling of structural proteins to create tough, protein sacs.

Coat keratinocytes in lipids to create a waterproof barrier.

Shield the nucleus of a keratinocyte from UV radiation.

A)

Single layer of cuboidal cells

B)

Up to 30 layers of flat, dead cells arranged in large sheets

C)

Slightly flat cells with a smaller amount of keratin

D)

Flat, alive, waterproof cells filled with large keratin bundles

E)

Flat, dead, cells in a few layers; only in thick skin

Choose the answer that best describes the role that keratohyalin granules play in normal epidermal function.

Question 2 options:

A)

Incredibly strong protein that bundles together to create a strong, protective layer.

B)

Cause the bundling of structural proteins to create tough, protein sacs.

C)

Coat keratinocytes in lipids to create a waterproof barrier.

D)

Shield the nucleus of a keratinocyte from UV radiation.

Explanation / Answer

1) the correct option should be flat,alive waterproof cell with large keratin bundles.

Stratum granulosum is a thin layer of epidermis,cell here are called keratocytes which produces and stores keratin bundles

they are hydrophobic in nature due to presence of lipod envelope over them and they are slightly granular in shape.

2=) incredibly strong protein that bundles together to create a strong protective layer.

Keratohyalin granules contains histidine risch and cysteine rich protein which helps in the binding keratin filaments.thus,it binds keratin filaments to form a tough protective coating.

Waterproof nature results due to secretion of lipids during cellular changes which forms protective coating over cells.

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