Immune System

Front

The healthy human immune system responds to pathogens with both specific and nonspecific processes. Which of the following models represents a nonspecific response?

Back

Front

What is the term for a strong response to a harmless antigen in the environment?

Back

An allergy

Front

Why might a doctor avoid prescribing antibiotics for colds and viral infections?

Back

If a doctor provides an antibiotic to treat colds and viruses, any bacteria in the patient's body will be killed, but a few will survive. Those few survivors may become resistant to antibiotics needed for real bacterial illnesses.

Front

An immune response that occurs in the human body is shown above. This activity helps to do which of the following?

• Produce antibiotics to control disease
• Provide protection against a specific pathogen
• Provide protection against all types of pathogens
• Eliminate harmful gene alterations

Back

Provide protection against a specific pathogen

Front

How does B-cell recognition of the measles virus help in human immune response?

Back

The B-cells produce antibodies more quickly if the measles virus is encountered again.

Front

What is the body's first line (non-specific) of defense against infection by foreign organisms? Options: antibodies, lymph nodes, white blood cells, the skin

Back

the skin

Front

Phagocytes perform which function in the human body?

Back

They engulf and destroy bacteria

Front

When a person is vaccinated, what are they injected with?

Back

weakened viruses or antigens from the virus

Front

Which of the following describes a way that a person's health can be affected by heredity?

• A person with a family history of obesity is more likely to catch a common cold.
• A person with a family history of high blood pressure is more likely to have heart disease.
• A person with a family history of obesity is less likely to enroll in a weight loss plan.
• A person with a family history of cancer is less likely to be screened for cancer.

Back

A person with a family history of high blood pressure is more likely to have heart disease.

Front

What is the best way to proceed in dealing with the public health problem of antibiotic-resistant bacteria?

Back

Antibiotics should only be prescribed to people with bacterial infections.