Autoimmunity is defined as a phenomenon involving which of the following?

Correct Answer: D

Rationale: Autoimmunity is when the immune system mistakenly attacks the body's own cells. Choice D is correct because it reflects this key feature - the inability to differentiate self from nonself. This leads to the immune system targeting healthy tissues. Choices A, B, and C are incorrect as they do not accurately describe autoimmunity. Choice A refers to endotoxins destroying B cells, which is not the definition of autoimmunity. Choice B mentions overproduction of reagin antibody, which is not related to autoimmunity. Choice C is incorrect as autoimmunity does not involve depression of the immune response but rather an inappropriate immune response.

Correct Answer: C

Rationale: The correct answer is C: To rule out cholinergic crisis Neostigmine. Edrophonium HCL is a short-acting cholinesterase inhibitor used to differentiate between myasthenic crisis and cholinergic crisis, as both conditions present similarly with muscle weakness. Administering edrophonium HCL will help determine if the patient's worsening weakness is due to excessive cholinergic stimulation from neostigmine (cholinergic crisis) or inadequate acetylcholine at the neuromuscular junction (myasthenic crisis). This step is crucial for proper management, as treating cholinergic crisis with more cholinesterase inhibitors like neostigmine can worsen symptoms. Incorrect choices: A: For its synergistic effect - Edrophonium HCL does not have a synergistic effect with neostigmine. B: Because of the client's resistance to - Resistance to neostigmine is not a reason to administer edrophonium H

Correct Answer: C

Rationale: The correct answer is C: 2, 3, and 4. High cholesterol, cigarette smoking, and a sedentary lifestyle are modifiable risk factors for developing hypertension. High cholesterol can lead to atherosclerosis, increasing blood pressure. Smoking can constrict blood vessels, raising blood pressure. Sedentary lifestyle can lead to obesity and overall poor cardiovascular health, contributing to hypertension. Race and age are non-modifiable risk factors. Choice A is incorrect because it includes race, a non-modifiable factor. Choice B is incorrect because it includes age, which is also non-modifiable. Choice D is incorrect because it includes all factors, including non-modifiable ones.

Correct Answer: B

Rationale: The correct answer is B: Potato. Potatoes are high in potassium, which is essential for various bodily functions. Potatoes can help increase potassium intake in patients who require it. Bread, eggs, and cereal are not as rich in potassium as potatoes. Increasing intake of these foods won't provide the necessary boost in potassium levels needed for the patient.

Correct Answer: C

Rationale: The correct answer is C: He walked home in a cold rain. Walking in cold rain can lead to vasoconstriction, which impairs blood flow, increasing the likelihood of a sickle cell crisis in individuals with sickle cell disease. This can cause red blood cells to sickle and block blood vessels, leading to pain and tissue damage. Choices A, B, and D do not directly affect the physiology of sickle cell disease and are less likely to trigger a crisis.

Correct Answer: B

Rationale: The correct answer is B: Ineffective airway clearance related to obstruction by a tumor or secretions. This takes highest priority as compromised airway can lead to respiratory distress and potential respiratory failure. Maintaining clear airways is essential for oxygenation and ventilation. Choices A, C, and D are important but do not pose immediate life-threatening risks compared to compromised airway. Disturbed body image, anxiety, and imbalanced nutrition can be addressed once the airway clearance is stabilized.

Correct Answer: C

Rationale: The correct answer is C: Tears and F: Breastmilk. HIV transmission has been established through breastmilk due to the presence of the virus in the milk. Tears can also transmit HIV if they contain blood from an HIV-positive individual. Saliva, sweat, and urine do not typically contain enough HIV to transmit the virus. Blood is a well-known mode of HIV transmission due to the high viral load present in blood. Therefore, choices A, B, D, and G are incorrect as they do not have sufficient levels of the virus to transmit HIV.

Correct Answer: A

Rationale: The correct answer is A: Postural hypotension. This condition is characterized by a drop in blood pressure upon standing, leading to dizziness. The client's symptoms of dizziness upon standing, along with nosebleeds and blurred vision, are indicative of low blood pressure. Postural hypertension (B) is not a recognized medical condition; White coat hypertension (C) refers to elevated blood pressure readings in a medical setting due to anxiety; White coat hypotension (D) is not a recognized medical condition.

Correct Answer: C

Rationale: The correct answer is C: Performing a physical examination. This method allows the nurse to directly gather data from the patient's body, such as vital signs, appearance, and overall health status. It provides essential information to establish a patient's database, including baseline values and potential health issues. Reviewing current literature (A) helps in decision-making but does not directly establish a patient's database. Checking orders for tests (B) and ordering medications (D) are part of the treatment process and do not focus on gathering initial patient data.