Immunity Revision Unit 4 Biology

Define what a pathogen is

• A microscopic agent that can cause harm

• An organism too small to be seen with a microscope

• Any substance that can harm you

• Any bacteria, virus or fungi

What is the body's first line of defense against infection by foreign organisms?

• antibodies

• lymph nodes

• white blood cells

• the skin

Disease-causing microorganism, such as a bacterium or virus.

• pathogen

• allergen

• prion

• antigen

A nonspecific defensive response of the body to tissue injury characterized by dilation of blood vessels and swelling.

• immunity

• interferon

• immunization

• inflammation

Which of the following is not apart of your body’s first line of defense?

• Skin

• Mucus

• Stomach Acid

• Antibodies

What do memory cells do?

• Kills the virus

• Eats the virus

• Patrol the area and make the immune system work faster next time.

• Makes antibodies

This type of cell inspects cells for antigens and kills any cells that display the foreign antigens.

• Macrophage

• T Cells

• B Cells

What do antibodies attach to on the pathogen?

• Anti inflammatory

• Antigens

• Antiseptic

• Antibodies

What do B cells produce?

• antigens

• macrophages

• T cells

• antibodies

Which of the following systems protects the body from disease?

• Digestive System

• Nervous System

• Immune System

• Skeletal System