Where on an Antibody Molecule Does Combination with Antigen Take

question 50

Multiple Choice

Where on an antibody molecule does combination with antigen take place?

• A) variable region
• B) constant region
• C) hinge region
• D) Fc region

---

Definitions:

All-or-none

A principle stating that the strength of a response of a nerve cell or muscle fiber is not dependent on the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.

Acetylcholine Agonist

A substance that mimics the action of acetylcholine, a neurotransmitter involved in memory and muscle contraction.

Acetylcholine

A neurotransmitter involved in many functions, including muscle movement, heart rate, memory, and learning.

Nicotine

A stimulant drug found in tobacco products, which is highly addictive and affects the nervous system.