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.
Structural hierarchy in the molecular organization of cells
Part A - Overview of the vertebrate nervous system
Components of the nervous system.
Conducting system of the heart.
Endocrine System
The response of the lac operon in the presence of lactose in a cell bearing the IS mutation