Question 1

Which of the following best describes the primary function of lymphatic vessels in the human body?

Accepted Answer

They return leaked fluid from the interstitial space back to the bloodstream.

Question 2

A patient presents with swelling in the lower limbs due to impaired lymphatic drainage. Which mechanism is most likely compromised?

Accepted Answer

Skeletal muscle compression aiding lymph flow

Question 3

Which of the following statements about lymph nodes is correct?

Accepted Answer

Lymph nodes are surrounded by a dense fibrous capsule and act as filters for lymph.

Question 4

The spleen differs from lymph nodes in which of the following ways?

Accepted Answer

The spleen filters blood, while lymph nodes filter lymph.

Question 5

Which of the following is a major component of MALT (mucosa-associated lymphoid tissue)?

Accepted Answer

Tonsils

Question 6

Which cell type is responsible for producing the stroma that supports other cells in lymphoid tissue?

Accepted Answer

Reticular cells

Question 7

A child is born with a congenital absence of the thymus. Which immune function will be most affected?

Accepted Answer

Maturation of T lymphocytes

Question 8

Which of the following best describes the process of clonal selection in humoral immunity?

Accepted Answer

Antigen binding selects a specific B cell to proliferate and form clones.

Question 9

Which equation best represents the relationship between hydrostatic and osmotic pressure in capillary fluid movement?

Accepted Answer

Net filtration pressure: $$NFP = (HP_c - HP_i) - (OP_c - OP_i)$$

Question 10

Which of the following is NOT a function of antibodies?

Accepted Answer

Directly lysing pathogens without complement

Question 11

A patient receives a vaccine for influenza. Which type of immunity is being induced?

Accepted Answer

Artificially acquired active immunity

Question 12

Which of the following is a characteristic of the adaptive immune response?

Accepted Answer

It has memory and can mount a faster response upon re-exposure to the same antigen.

Question 13

Which process allows neutrophils to squeeze between endothelial cells and enter tissues during inflammation?

Accepted Answer

Diapedesis

Question 14

Which of the following best explains why complement proteins have multiple activation pathways?

Accepted Answer

Different pathogens present unique surface molecules, requiring varied recognition mechanisms.

Question 15

Which cell type is primarily responsible for directly attacking and killing infected or cancerous cells?

Accepted Answer

Cytotoxic T cells

Question 16

A person develops an allergy to pollen. Which immunological mechanism is most likely involved?

Accepted Answer

Immediate hypersensitivity (Type I) involving IgE antibodies and mast cells

Question 17

Which equation describes the rate of antibody production during a secondary immune response?

Accepted Answer

$$Rate_{secondary} = k 	imes [Memory\ B\ cells]$$

Question 18

Which of the following is true regarding the thymus compared to other lymphoid organs?

Accepted Answer

The thymus contains no B cells and is not directly involved in fighting antigens.

Question 19

Which of the following best describes the role of antigen-presenting cells (APCs) in adaptive immunity?

Accepted Answer

APCs engulf antigens and present fragments on their surface to activate T cells.

Question 20

A patient with AIDS is most likely to have a deficiency in which cell type, leading to impaired immune function?

Accepted Answer

Helper T cells

Study Guide: The Lymphatic System and Immune System (Innate and Adaptive Defenses)

Study Guide - Practice Questions