What happens when an antibody binds an antigen?

a. it causes pathogens to stick together.

b. it increases body temperature.

c. it produces cytotoxic t cells.

d. it starts the inflammatory response.

A. It causes pathogens to stick together.

Explanation:

Antigens are the antibody generating substances present on the surface of the pathogen such as bacteria, viruses and fungi.  When an antibody binds to an antigen (proteins on the surface of pathogens), it makes the pathogens to stick together. This limit the movement of the pathogens around the body and this allows phagocytes to engulf and then destroy them easily.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up