Question

A/1/The process of opsonisation of antigen particles involves:

Select one: _

a. inhibition of viral replication

b. chemotaxis

c. coating bacteria with antibodies or complement component

d. activation of natural killer (NK) cells e. cytokine production

2/Under resting conditions, most of the heat loss from the body occurs through:

Select one:

a. radiation

b. sweating

c. conduction

d. convection

3/In the female reproductive cycle, the surge of luteinizing (LH) hormone leads to:

Select one:

a. ovulation L

b. disintegration of corpus luteum

c. menstruation

d. growth of primordial follicles

Answer 1

Ans 1- c. Coating bacteria with antibodies or complement component

Opsonization is the process by which particles such as bacteria and antigens are targeted for killing by an immune cell known as a phagocyte.

Binding molecules are usually IgG antibody and complement protein like C3b C4b. These molecules are also known as opsonins.

Ans 2. Raditation is the most important mechanism of heat transfer at rest.

There are 4 ways by which heat loss occurs in the body

1. Conduction -- In this method heat loss occurs by physical contact.

2. Convention -- Heat loss occurs due to air current or airflow.

3. Radiation -- Radiation refers to transfer of heat in the form of electromagnatic waves between surrounding and

the body without any physical contact.

4. Evaporation --- losing heat through conversion of water into vapour

Ans 3. Ovulation

FSH (Follicular stimulating hormone) and Leutinising hormone (LH) is secreted by anterior pituitary

FSH is responsible for secretion of estrogen from theca cells and causes Follicular growth

LH surge ocuurs prior to ovulation which is responsible for Ovulation.