Biology

Human Immunity and Blood

2,096 Questions

Human immunity and blood questions cover the physiological mechanisms protecting the body against diseases and the components of blood. Topics include blood groups, cell mediated immunity, monoclonal antibodies, and blood coagulation. These biology topics frequently appear in general science sections of competitive exams.

Blood groupsCell mediated immunityMonoclonal antibodiesBlood coagulationCancer immunology

Human Immunity and Blood Questions

Multiple choice

White blood cells fight against

  1. Germs

  2. Microorganisms

  3. Allergens

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The blood also has white blood cells (WBC) which fight against germs that may enter our body.

Multiple choice

The fluid part of the blood is called

  1. Lymph

  2. Red blood cells

  3. White blood cells

  4. Plasma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lymph is not a part of the blood. Red blood cells and white blood cells are formed elements of the blood.

Multiple choice

The secondary lymphoid system comprises of

  1. thymus and liver

  2. spleen, lymphocytes, tonsils and mucosal lymph tissue

  3. RBCs, WBCs and platelets

  4. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The secondary lymphoid system comprises of spleen, lymphocytes, tonsils and mucosal lymph tissue. 

Multiple choice

Which of the following is true for T–lymphocytes?

  1. They cannot release antibodies.

  2. They mature in lymph nodes.

  3. They comprise 10–15% of lymphocytes.

  4. They are principal cells in lymph node’s cortical centre.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 T-lymphocytes are principal cells in lymph node’s cortical centre.

Multiple choice

T- lymphocytes are of _________ type/s.

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

T-lymphocytes are generally categorized into four main functional types: helper T cells, cytotoxic T cells, memory T cells, and regulatory T cells.

Multiple choice

Killer cells are known as

  1. cytotoxic

  2. suppressor

  3. memory

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cytotoxic T cells are specialized immune cells that destroy infected or cancerous cells, earning them the name killer cells.