5.2 Test Review

Define immune system

• Body's defense against pathogens

• Body's defense against hormones

• Body's method of taking in antibodies

• Body's method of killing cancer cells

A function of white blood cells is to

• transport oxygen to body cells

• produce hormones that regulate cell communication

• carry glucose to body cells

• protect the body against pathogens

What is a pathogen?

• white blood cell

• a type of squirrel

• the protein found on an antigen

• foreign invader in the body: bacteria, virus, fungi, etc

What are the proteins on the surface of pathogens?

• white blood cells

• antigens

• lymphocytes

• glucose

Antigens, antibodies, and hormones are what type of molecule?

• carbohydrate

• lipid

• protein

• starch

After a hormone enters the bloodstream, it is transported throughout the body, but the hormone affects only certain cells. Only certain cells are affected because these cells have a specific __________________?

• tissue

• carbohydrates

• antibodies

• shape

When the body contracts an infection, what happens to the number of white blood cells?

• increase

• decrease

A protein directly involved in cellular communication within the human body is

• antibody

• horomone

• antibiotic

• hosts

What is a vaccine?

• a live virus

• a dead or weakened form of a virus

• a deadly form of a virus

• an antibiotic

Hormones are part of the body's response system.

• fast

• slow