Asked by Anthony Williams on Apr 28, 2024
Verified
Which of the following secrete chemicals that produce holes in the membranes of harmful cells but do not have to recognize a specific antigen to start destroying pathogens?
A) Major histocompatibility complex (MHC)
B) Cytokines
C) B cells
D) Natural killer (NK) cells
E) T cells
Natural Killer Cells
Immune cells that play a crucial role in the destruction of infected or cancerous cells without prior sensitization.
Specific Antigen
A particular substance that the immune system recognizes and responds to, often triggering an immune response.
Pathogens
Microorganisms or viruses that can cause disease in their host, including bacteria, viruses, fungi, and parasites.
- Acknowledge the significance of T cells and B cells as specific defenses in the immune system's response.
- Describe the contributions of different white blood cells and proteins in the defense mechanism of the body against pathogens.
Verified Answer
SS
Smile SadiouraMay 05, 2024
Final Answer :
D
Explanation :
Natural killer (NK) cells are part of the innate immune system and can attack and destroy harmful cells without the need for prior recognition of a specific antigen. They secrete chemicals that create pores in the membranes of target cells, leading to cell death.
Learning Objectives
- Acknowledge the significance of T cells and B cells as specific defenses in the immune system's response.
- Describe the contributions of different white blood cells and proteins in the defense mechanism of the body against pathogens.