Immune System and Immunity

Which one is a way the body defends against a pathogen?

• Fever
• Stomach Acid digesting
• White Blood Cells fighing
• All of these are correct

 Like all other body systems, the immune system helps the body maintain homeostasis.  Which statement best describes how the immune system does this?  

• it protects other organs and tissues from infection and disease
• it breaks down food to provide cells with nutrients
• it gathers information through the senses and controls all other body systems
•  it transports oxygen and carbon dioxide

Tags

NGSS.HS-LS1-3

What is the body's first line of defence against infection?

• Physical barriers

• White blood cells

• Blood plasma

• Red blood cells

Which of the following cells make antibodies?

• T Cells

• Phagocytes

• B Cells

• Pathogens

A pathogen is

• a disease

• a disease-causing plant

• a disease-causing animal

• a disease-causing microorganism (bacteria, virus)

What do antibodies bind to?

• antigens

• antitoxins

• phagocytes

• lymphocytes

Viruses cannot reproduce outside of a host cell.

• true

• false

Which type of white blood cell produces antibodies that are released into the bloodstream?

• cytotoxic T cells

• helper T cells

• phagocytes

• B cells

Which type of cell activates cytotoxic T cells and B cells?

• phagocytes

• helper T cells

• antibodies

• none of the above

Which type of cell destroys cells infected with a virus or pathogen?

• B Cells

• Helper T Cells

• Cytotoxic T Cells

• Phagocytes