Lymphocyte Activation Can Occur in Several Ways

question 148

Multiple Choice

Lymphocyte activation can occur in several ways. However, in all cases

• A) lymphocytes must recognize an antigen.
• B) helper T cells are activated first and they then stimulate other cells.
• C) antigen-presenting cells process the antigen and present it to the lymphocytes.
• D) cytokines released by the antigen stimulate the lymphocyte response.
• E) antigens must be able to recognize the lymphocytes.

Recognize the social and psychological implications of living in urban versus rural settings.

Understand the categories of urbanites and their characteristics as identified by sociologists.

Recognize the social and environmental motivations behind individual lifestyle choices, such as living in wilderness or urban areas.

Identify and explain the significance of global cities and their roles in the world economy.

---

Definitions:

Epinephrine (Adrenaline)

A hormone and neurotransmitter involved in the body's fight-or-flight response, increasing heart rate, muscle strength, blood pressure, and sugar metabolism.

Cytokines

These chemical messengers are produced by the body as part of its immune response. These proteins can either promote inflammation or reduce it.

Dopamine

A neurotransmitter and a hormone that serves many functions in the body. As a neurotransmitter, it is involved in several brain processes, including reward systems. Low levels of dopamine production are associated with Parkinson’s disease.

Lifespan

The duration of time an individual lives, from birth to death, taking into consideration the developmental stages and transitions faced over the years.