Which of the Following Statements Are Fundamental to the Clonal

question 37

Multiple Choice

Which of the following statements are fundamental to the clonal selection theory of how the adaptive immune system functions?
I. Each lymphocyte has a unique membrane receptor that recognises one antigen.
II. When the lymphocyte binds an antigen, it is activated and begins dividing to form many identical copies of itself.
III. Cloned lymphocytes have slight differences and are selected by the spleen for removal if they do not bind an antigen.
IV. Cloned cells descend from an activated lymphocyte and persist even after the pathogen is eliminated.

• A) only I and III
• B) only II and IV
• C) only I, II, and IV
• D) only II, III, and IV

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Definitions:

Brain Structures

The distinct anatomical parts of the brain, each having specialized functions, such as the cerebellum for coordination and the hippocampus for memory.

Pituitary Gland

A small gland at the base of the brain that produces hormones influencing various physiological processes including growth, reproduction, and metabolism.

Hypothalamus

A region of the brain that plays a crucial role in many important functions, including releasing hormones and regulating body temperature.

Reticular Formation

A network of neurons located in the brainstem that plays a key role in controlling arousal and consciousness.