Answer to Question 1
Correct Answer: 3
Rationale 1: Antigens form in response to antibodies.
Rationale 2: Mast cells are a part of the inflammatory response.
Rationale 3: The cells of the immune system secrete cytokines.
Rationale 4: Antibodies are substances that attack antigens. They are not secreted by the immune system.
Global Rationale: When challenged by antigens, certain cells of the immune system secrete cytokines, which are substances that help the body mediate and intensify the immune response. Because cytokines have powerful actions on the immune system, the body generally only produces them when challenged by an antigen; their production is rapid though transient. Antigens form in response to antibodies. Mast cells are a part of the inflammatory response. Antibodies are substances that attack antigens. They are not secreted by the immune system.
Answer to Question 2
Correct Answer: 2
Rationale 1: Immunosuppressants should not affect serum calcium levels.
Rationale 2: Immunosuppressants are used to reduce joint inflammation.
Rationale 3: Immunosuppressants should decrease erythrocyte sedimentation rates.
Rationale 4: Immunosuppressants would decrease white cell counts.
Global Rationale: Immunosuppressants are used to prevent transplant rejection and for the treatment of autoimmune disorders such as RA, SLE, myasthenia gravis, and Hashimoto's thyroiditis.
The cells of eukaryotes (left) and prokaryotes (right)
The hypothalamic-pituitary portal system.
Receptors in the Autonomic Nervous System
Gene gun used to blast gold particles containing pea gene A into cells of white petals
Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri
The response of the lac operon in the presence of lactose in a cell bearing the IS mutation