Explain a function for the following types of cells: CTL, TH, and Treg. What is a cytokine?

Verified step by step guidance

Identify the full names of the cell types: CTL stands for Cytotoxic T Lymphocyte, TH stands for T Helper cell, and Treg stands for Regulatory T cell.

Explain the function of CTLs: These cells recognize and kill infected or cancerous cells by inducing apoptosis, playing a key role in cell-mediated immunity.

Describe the role of TH cells: T Helper cells assist other immune cells by releasing cytokines that enhance the immune response, including activating B cells and macrophages.

Clarify the function of Treg cells: Regulatory T cells help maintain immune system balance by suppressing excessive immune responses and preventing autoimmunity.

Define a cytokine: Cytokines are small signaling proteins secreted by immune cells that mediate and regulate immunity, inflammation, and hematopoiesis.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.

Video duration:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cytotoxic T Lymphocytes (CTL)

CTLs are immune cells that directly kill infected or cancerous cells by recognizing antigens presented on MHC class I molecules. They release perforin and granzymes to induce apoptosis in target cells, playing a crucial role in cellular immunity.

T Helper Cells (TH)

TH cells assist other immune cells by secreting cytokines that regulate immune responses. They recognize antigens on MHC class II molecules and help activate B cells, CTLs, and macrophages, coordinating adaptive immunity.

Regulatory T Cells (Treg)

Treg cells maintain immune tolerance by suppressing excessive immune responses and preventing autoimmunity. They modulate the activity of other immune cells through direct contact and cytokine secretion, ensuring immune homeostasis.

Recommended video:

Guided course