The nurse has explained the process of phagocytosis to a client ...

[Shelles]

The nurse has explained the process of phagocytosis to a client with an infected wound. The client is fascinated by the nurse's description of cells that eat other cells and asks, Why don't they eat good cells, too? How should the nurse respond?
 
  1. They do, but there are not enough phagocytic cells to kill enough good cells to make a person sick.
  2. The cells migrate to the infection before they start killing other cells.
  3. They don't eat good cells because of a process called chemotaxis.
  4. These cells can tell the difference between cells from the person's body and foreign cells.

Question 2

The school nurse is speaking to a group of children in middle school about preventing infection. How can the nurse best explain why it is so important for the children to keep from injuring their skin?
 
  Standard Text: Select all that apply.
  1. Your skin cells are packed together tightly to keep germs out. If you disrupt that barrier, germs can get into your body.
  2. The sweat on your skin discourages germ growth. You don't want to damage the cells that produce sweat.
  3. You shed skin cells all the time, along with the germs on the skin.
  4. If you damage the skin's outer layer, it will never grow back.
  5. The deep layers of your skin have special cells that eat germs.

[miss.ashley]

Answer to Question 1

Correct Answer: 4
Rationale 1: Normal phagocytic cells do not kill healthy good cells.
Rationale 2: Phagocytic cells do migrate to the infection, but would phagocytize any foreign cell encountered on the way.
Rationale 3: Chemotaxis is the process by which phagocytes move from one site to the infection.
Rationale 4: Phagocytic cells have proteins on their surface that allow them to recognize cells and cellular components that are nonself.
Global Rationale: Phagocytes have proteins on their surface that allow them to recognize cells and cellular components that are non-self. When recognized as non-self, the pathogen is internalized and destroyed within the phagocyte. They do not kill healthy or good cells. Chemotaxis is the process by which phagocytes migrate from one site to another, killing foreign cells along the way.

Answer to Question 2

Correct Answer: 1,2,3,5
Rationale 1: Using simple, familiar terms helps clients understand the process. The skin cells are packed tightly together.
Rationale 2: Sweat does discourage pathogen growth.
Rationale 3: Shedding of skin cells helps to rid the skin of pathogens but leaves the surface of the skin intact.
Rationale 4: The outer layer of the skin is made up of dead cells that are continually shed.
Rationale 5: Dendritic cells are in the deeper layers of the epidermis and are phagocytic.
Global Rationale: The skin and mucous membranes are considered the first line of defense against pathogen invasion. The intact skin is a formidable physical barrier to pathogens. The cells of the epidermis are packed tightly together, which discourages penetration by microbes. The outer layer of skin cells is continually shed, along with any microbes that may be clinging to them. The accessory structures of the skin secrete sebum (oil), sweat, and antimicrobial peptides that discourage microbial growth on the surface. The skin is also colonized with a variety of bacteria and fungi that are normally harmless to the host. Microbiota (flora) compete with pathogens for space and nutrients, thus creating an unfavorable growth environment for harmful organisms. However, should the skin become broken or compromised by needlesticks or catheters, some species of normal flora may become pathogenic. Damaged skin does grow back.

[Shelles]

Gracias!

[ebonylittles]

Excellent