Immune Systems

 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

The picture below illustrates one internal part of the body’s immune system. What process is illustrated in the picture?  

• a skin cell destroying germs.
• inflammation near an opened wound
• a white blood cell destroying pathogens
• mucus in the lungs destroying pathogens

Tags

NGSS.MS-LS1-3

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

• diseases
• vaccines
• antibodies
• pathogens

Jorge has a cold but feels well enough to study with his friends Lisa and Jin. Lisa and Jin become sick. Which term describes Jorge’s condition when he was studying with his friends?  

• noninfectious
• contagious
• immune
• deadly

 Liz notices that shortly after cutting her arm accidentally the area around the cut is turning red and feeling hot.  Which immune system defense is Liz experiencing?  

• inflammation
• white blood cell clotting
• skin
• fever

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

• 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

Erick wants to avoid exposure to infectious disease as much as possible.  Which strategy can best help him do this?  

• eat a balanced diet
• wash his hands regularly
• wear sunscreen outside
• exercise several days a week

Scientists are testing the effectiveness of 3 different viral medicines (or vaccines) in protecting against the common cold.  They sign up 1,200 human volunteers and split them into three groups.  So each group of 400 people is given one of the vaccines.  The groups are studied for five years and the scientists record how many colds they get each year.  What is the dependent variable in this investigation?  

• different viral medications
• the type of common cold virus
• the number of years
• the number of colds each year