Immune System

 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

What do scientists call bacteria and viruses that can make people sick?  

• diseases
• vaccines
• antibodies
• pathogens

Diseases are passed from human to human by these four types of pathogens:

• Viruses, influenza, HIV, and vaccines

• Viruses, bacteria, fungi, and parasites

• Viruses, cancers, mutagens, and DNA

• Viruses, blood, pollutants, and symptoms

Which answer best describes how infectious diseases get transmitted (passed on)?  

• people can sneeze or cough and pass disease on through the air
• drinking water can be contaminated with diseases
• objects such as doorknobs and towels can be contaminated by disease
• all of the above answers are ways that diseases are transmitted

The human body has both internal and external defense against disease.  Which of these includes only internal defenses?  

• hair and inflammation
• white blood cells and sweat
• inflammation and white blood cells
• skin and mucus

Antibiotics work against most

• Bacteria
• Bacteria & Viruses
• Vaccines
• Viruses

True/False: Your body cannot make antibodies for pathogens that you have never been in contact with.

• True, because your body needs to encounter the pathogen at least once in order to create the antibodies.

• False, because you can make antibodies via immunizations given by a doctor.

What is the function of antibodies within the immune system?

• Antibodies kill off any antigen that enters the body.

• Antibodies are only made when you are given a vaccination for specific antigens.

• Antibodies bind to specific antigens to flag for destruction.

• Antibodies are part of an external defense mechanism.

What is the body's first line (non-specific) of defense against infection by foreign organisms?

• antibodies

• lymph nodes

• white blood cells

• the skin

What type of microbe is used in a vaccine?

• it doesn't really matter
• a damaged one
• a weakened or inactivated one
• a normal one