Globulins contained in human blood plasma are primarily involved in

Options

A. defence mechanisms of body
B. osmotic balance of body fluids
C. oxygen transport in the blood
D. clotting of blood

Answer

**Step-by-Step Solution:**

1. **Understanding Globulins**: Globulins are a group of proteins found in blood plasma. They play various roles in the body, including immune responses.

2. **Types of Globulins**: The primary type of globulins involved in immune responses are called immunoglobulins (Ig). There are several classes of immunoglobulins, including IgG, IgA, IgM, IgE, and IgD.

3. **Function of Immunoglobulins**: Immunoglobulins function as antibodies. They are crucial for the body's defense mechanism against pathogens (foreign bodies such as bacteria and viruses).

4. **Structure of Antibodies**: Antibodies have a characteristic Y-shaped structure, consisting of heavy and light chains connected by disulfide bonds. This structure allows them to bind specifically to antigens.

5. **Activation of Antibodies**: When an antigen enters the body, specific antibodies are produced in response. The type of antibody produced depends on the type of antigen.

6. **Conclusion**: Therefore, the primary role of globulins, specifically immunoglobulins, in human blood plasma is to defend the body against infections by identifying and neutralizing foreign invaders.

**Final Answer**: Globulins contained in human blood plasma are primarily involved in the defense mechanism of the body.

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