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What is the function of the immune system?

It exchanges oxygen and carbon dioxide.

It provides structure for the body.

It eliminates waste from the body.

It responds when pathogens enter the body.

11 answers

The function of the immune system is to respond when pathogens enter the body. The immune system protects the body against infections and diseases by identifying and eliminating harmful invaders such as bacteria, viruses, fungi, and parasites.

A ___
is an agent that can cause infections and diseases.

A pathogen is an agent that can cause infections and diseases. Pathogens include a variety of microorganisms such as bacteria, viruses, fungi, and parasites.

Use the drop-down menus to determine whether the following barriers are physical, chemical, or biological. choose one for EACH



physical
chemical
biological
lysozyme






physical
chemical
biological
skin






physical
chemical
biological
phagocytes






physical
chemical
biological
Langerhans cells






physical
chemical
biological
acid and oil secretions






physical
chemical
biological
sneezing or coughing

Here are the classifications for each barrier:

  • lysozyme: chemical
  • skin: physical
  • phagocytes: biological
  • Langerhans cells: biological
  • acid and oil secretions: chemical
  • sneezing or coughing: physical

Let me know if you need further assistance!

Fill in the blanks below.

The complement system is a___
barrier of the immune system.

The complement system is a group of___
in the blood that detect pathogens that have entered the body.

The complement system can cause___
, the swelling of a part of the body accompanied by redness, swelling, and pain as a response to infection.

Here are the filled blanks:

The complement system is a biological barrier of the immune system.

The complement system is a group of proteins in the blood that detect pathogens that have entered the body.

The complement system can cause inflammation, the swelling of a part of the body accompanied by redness, swelling, and pain as a response to infection.

Use the drop-down menus to determine which type of white blood cell is described below. choose ONE for each





phagocytes
B lymphocytes
T Helper cells
activate memory cells






phagocytes
B lymphocytes
T Helper cells
engulf and digest pathogens






phagocytes
B lymphocytes
T Helper cells
produce antibodies

Here are the correct matches for each description:

  • engulf and digest pathogens: phagocytes
  • produce antibodies: B lymphocytes

Let me know if you need any further assistance!

Use the drop-down menus to determine which type of white blood cell is described below.

✔ T Helper cells
activate memory cells

✔ phagocytes
engulf and digest pathogens

✔ B lymphocytes
produce antibodies

Identify the immune response described as nonspecific or specific.





specific response
nonspecific response
uses memory cells to fight off an infection from a pathogen






specific response
nonspecific response
evident by a sneeze, cough, fever, or other physical symptom






specific response
nonspecific response
recognizes antigens present on pathogens and attacks the pathogen with antibodies






specific response
nonspecific response
builds immunity to specific diseases that had previously entered the body






specific response
nonspecific response
does not target specific pathogens


choose ONE for each

Here are the descriptions matched with either "specific response" or "nonspecific response":

  • uses memory cells to fight off an infection from a pathogen: specific response
  • evident by a sneeze, cough, fever, or other physical symptom: nonspecific response
  • recognizes antigens present on pathogens and attacks the pathogen with antibodies: specific response
  • builds immunity to specific diseases that had previously entered the body: specific response
  • does not target specific pathogens: nonspecific response

Let me know if you need any further assistance!