Question

Differentiate between the following pairs:

i) Cornified layer and Germinativelayer

ii) Vasodilation and Vasoconstriction

iii) Poikilothermal and Homeothermal​

Answer 1

Answer:

1. CORNIFIED LAYER. The uppermost layer of the epidermis, previously known as the stratum corneum. It is formed by flattened dead-cell remnants to create a physical barrier for the skin. DESQUAMATION. The physiological process of shedding dead corneocytes from the uppermost layer of the epidermis. while germinative layer is the innermost layer of the epidermis from which new tissue is constantly formed.

2.While vasodilation is the widening of your blood vessels, vasoconstriction is the narrowing of blood vessels. It's due to a contraction of muscles in the blood vessels. When vasoconstriction occurs, the blood flow to some of your body's tissues becomes restricted. Your blood pressure also rises

3.A poikilotherm is an animal whose internal temperature varies considerably. It is the opposite of a homeotherm, an animal which maintains thermal homeostasis. And the term in principle can apply to all organisms, it is generally only applied to animals, and mostly to vertebrates, while the homeothermal is having constant and relatively high body temperature; warm-blooded; same as homoiothermal; - of birds and mammals. Contrasted to poikilothermal.