Pathogens and Infection

Ticks are an example of this way of transmitting (spreading) disease

• Air-borne

• Vector

• Touching a surface

• Contaminated food or water

Infectious diseases are caused by _________ in the body.

• pathogens

• decomposers

Which of the following is an example of direct contact with an infected person?

• sneezing

• shaking hands

Which of the following is NOT responsible for causing infectious diseases?

• Miasma

• Bacteria

• Fungi

• Viruses

Which is NOT one way that pathogens spread?

• droplets in the air

• food

• through animals

• water

• through email

Which best distinguishes an infectious disease from a noninfectious disease?

• Infectious diseases can be cured with antibiotics; noninfectious diseases cannot.
• Infectious diseases can be prevented with vaccines; noninfectious diseases cannot.
• Infectious diseases can be spread from one organism to another; noninfectious diseases cannot.
• Infectious diseases cannot be transmitted from one organism to another; noninfectious diseases can.

The diagram below shows a cell in the human body engulfing a bacterial cell.

The cell labeled X is most likely a

• red blood cell

• white blood cell

• liver cell

• nerve cell

Tags

NGSS.MS-LS1-3

Some human white blood cells help destroy pathogenic bacteria by

• causing mutations in the bacteria

• engulfing and digesting the bacteria

• producing toxins that compete with bacterial toxins

• inserting part of their DNA into the bacterial cells

Which function is associated with phagocytes in the blood?

• initiating blood clots

• transporting dissolved nutrients

• producing hormones

• engulfing bacteria

The diagram below represents an event that occurs in the blood.

Which statement best describes this event?

• Cell A is a white blood cell releasing antigens to destroy bacteria.

• Cell A is a cancer cell produced by the immune system and it is helping to prevent disease

• Cell A is a white blood cell engulfing disease causing organisms.

• Cell A is protecting bacteria so they can reproduce without being destroyed by predators.