The Immune System

The first line of defense involves which structure(s)?

• T-cells

• skin

• blood

• B-cells

Which of these are included in the immune response? Select 3 correct answers.

• T-Cells

• lymphocytes

• B-cells

• stem cells

• oil

Which substances are contained in saliva and tears to break down pathogens?

• enzymes

• acids

• oils

• sweat

If a pathogen on food got past saliva, which additional defenses in the first line of defense would the pathogen contact?

• stomach acid and lymphocytes

• lymphocytes and phagocytes

• phagocytes and mucus

• mucus and stomach acid

Which best describes the purpose of a fever?

• to make the body too hot for the bacteria to live

• to make the body too cold for the bacteria to live

• to stimulate lymphocytes to make antibodies

• to stimulate an increased production of sweat

Tags

NGSS.HS-LS1-3

Which of these engulf bacteria and break them down?

• lymphocytes

• phagocytes

• T-cells

• B-cells

James was exposed to a pathogen when he was 10 years old and felt ill. What would most likely happen if he were exposed to the same pathogen when he is 12 years old?

• His body would destroy the pathogen before he felt symptoms.

• His reaction to the pathogen would be worse than the first.

• His antibodies would decrease, since he had been exposed already.

• New types of antibodies would be made in response to the second exposure.

Which statement describes many of the structures involved in the first line of defense of the immune system?

• They have contact with the external environment.

• They are internal and contact the pathogen through blood.

• They produce B-cells in response to a pathogen.

• They produce T-cells in response to a pathogen.

When studying the immune system in class, Peta concluded that T-cells are more specific to the pathogen than inflammation is. What did Peta most likely learn that led to this conclusion?

• T-cells are made to identify antibodies, while inflammation starts a fever.

• T-cells are made to identify antigens, while inflammation starts to make antibodies.

• T-cells make antibodies that cause a fever, while inflammation identifies antigens on the pathogens.

• T-cells are made to identify antigens, while inflammation fights anything in the affected area.

Which statement best describes how a B-cell works?

• It produces antigens, which stimulate a fever.

• It produces antibodies specific to an antigen.

• It produces antigens specific to antibodies.

• It produces antibodies, which stimulate a fever.