Which type of immunity is acquired when an individual receives preformed antibodies against a specific pathogen?

Explanation: During cell-mediated immunity, T cells recognize antigens that are presented by antigen-presenting cells (APCs) such as macrophages. Macrophages engulf and process pathogens, and then they display fragments of the pathogens' antigens on their cell surface using major histocompatibility complex (MHC) molecules. T cells, specifically helper T cells, interact with these antigen-presenting macrophages and become activated to initiate immune responses.

Incorrect choices:
b. B cells present antigens to helper T cells during the humoral immune response, not during cell-mediated immunity.
c. Plasma cells are not involved in antigen presentation; they are terminally differentiated B cells that produce antibodies during the humoral immune response.
d. Memory cells are formed after the immune system encounters an antigen and are not directly involved in antigen presentation.

Explanation: Fibromyalgia is a chronic pain disorder characterized by widespread pain, fatigue, and tender points in specific areas of the body, such as the neck, shoulders, back, and hips.

Incorrect choices:

a. Systemic lupus erythematosus (SLE) is an autoimmune disorder that can affect multiple organs and systems, including the skin, joints, kidneys, and nervous system.

c. Multiple sclerosis (MS) is an autoimmune disorder that affects the central nervous system, causing symptoms such as fatigue, muscle weakness, and coordination problems.

d. Sjögren's syndrome is an autoimmune disorder that primarily affects the salivary and lacrimal glands, leading to dry eyes and dry mouth.

True or False: Immune disorders can be caused by both genetic and environmental factors.

Explanation: Immune disorders can result from a combination of genetic predisposition and environmental triggers. Some individuals may have a genetic susceptibility to developing certain immune disorders, and exposure to certain environmental factors, such as infections or certain substances, can trigger the immune response leading to the development of the disorder.