what is a characteristic of coronary artery disease cad

ATI RN

ATI Pathophysiology Exam 1

1. What is a characteristic of coronary artery disease (CAD)?

A. The build-up of infectious by-products in the lymph nodes
B. Insufficient delivery of oxygenated blood to the myocardium
C. Insufficient delivery of carbon dioxide to the lungs
D. The build-up of bile in the stomach and gallbladder

Correct answer: B

Rationale: The correct characteristic of coronary artery disease (CAD) is the insufficient delivery of oxygenated blood to the myocardium. CAD is a condition where the coronary arteries become narrowed or blocked, leading to reduced blood flow to the heart muscle. This lack of oxygenated blood can result in chest pain, known as angina, and if a coronary artery becomes completely blocked, it can cause a heart attack. Choices A, C, and D are incorrect. Choice A refers to an issue related to the lymphatic system, choice C is about gas exchange in the lungs, and choice D describes a problem with bile accumulation in the digestive system, none of which are characteristics of CAD.

2. What is a cause of the crystallization within the synovial fluid of the joint affected by gouty arthritis?

A. Destruction of proteoglycans
B. Underexcretion of uric acid
C. Overexcretion of uric acid
D. Increased absorption of uric acid

Correct answer: B

Rationale: The correct answer is B: Underexcretion of uric acid. Gouty arthritis is primarily caused by the underexcretion of uric acid, leading to its accumulation in joints and subsequent crystallization. Choices A, C, and D are incorrect as they do not directly relate to the pathophysiology of gout. Destruction of proteoglycans, overexcretion of uric acid, and increased absorption of uric acid are not primary causes of gouty arthritis.

3. In Guillain-Barre syndrome, what pathophysiologic process underlies the deficits that accompany the degeneration of myelin in the peripheral nervous system (PNS)?

A. The destruction of myelin results in a reduction in Schwann cell production in the client's PNS.
B. The lack of myelin surrounding nerve cells compromises the axonal transport system.
C. Without remyelination, the axon will eventually die.
D. A deficit of myelin makes the client more susceptible to infection by potential pathogens.

Correct answer: C

Rationale: In Guillain-Barre syndrome, the destruction of myelin leads to axonal damage. If remyelination does not occur, the axon will eventually degenerate and die, impacting nerve function. Choice A is incorrect because the destruction of myelin does not affect Schwann cell production. Choice B is incorrect as the lack of myelin directly affects the conduction of nerve impulses, not the axonal transport system. Choice D is incorrect as a deficit of myelin does not predispose the client to infections by potential pathogens.

4. A client has approached the nurse asking for advice on how to deal with his alcohol addiction. The nurse should tell the client that the only effective treatment for alcoholism is:

A. psychotherapy.
B. total abstinence.
C. Alcoholics Anonymous (AA).
D. aversion therapy.

Correct answer: B

Rationale: The correct answer is B: total abstinence. Total abstinence from alcohol is considered the most effective treatment for alcoholism. This approach eliminates the risk of relapse and helps individuals maintain sobriety. While psychotherapy can be beneficial in addressing underlying issues, total abstinence is crucial in overcoming alcohol addiction. Alcoholics Anonymous (AA) is a supportive group that can complement treatment, but it is not the only effective approach. Aversion therapy aims to create a negative association with alcohol but may not address the underlying causes of addiction, making total abstinence a more comprehensive and recommended approach.

5. What is responsible for initiating clonal selection?

A. B cells
B. T cells
C. Antigens
D. Lymphocytes

Correct answer: C

Rationale: Antigens are the correct answer as they are the molecules that trigger the immune response by binding to specific B or T cells. This binding activates these cells, leading to their proliferation and differentiation to fight off the antigen. B cells and T cells are the responders to antigens, not the initiators of clonal selection. Lymphocytes is a broad term encompassing both B and T cells, so it is not the specific factor responsible for initiating clonal selection.