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Neurology and Immunology Essentials
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Neurology and Immunology Essentials
Neurology and Immunology Essentials
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1
Question
What are the three layers of the meninges in the central nervous system?
Page 1
Answer
The three layers are the dura mater (outer), the arachnoid mater (middle), and the pia mater (inner).
2
Question
What condition should the nurse suspect if a patient becomes unconscious following a recent head injury?
Page 1
Answer
The nurse should suspect increased intracranial pressure (ICP) or traumatic brain injury (TBI) with potential intracranial hemorrhage.
3
Question
How does head-of-bed elevation help reduce intracranial pressure (ICP)?
Page 1
Answer
Elevating the head of the bed promotes venous drainage from the brain through the jugular veins, decreasing cerebral blood volume.
4
Question
Why is proper positioning for intracranial pressure (ICP) management considered a higher priority than patient comfort?
Page 1
Answer
Maintaining adequate cerebral perfusion and preventing herniation are life-saving priorities that outweigh the temporary physical discomfort of specific head positions.
5
Question
What is the definition of apraxia in the context of neurologic disorders?
Page 1
Answer
Apraxia is the inability to perform particular purposive actions, as a result of brain damage.
6
Question
What is the definition of agnosia in the context of neurologic disorders?
Page 1
Answer
Agnosia is the inability to interpret sensations and hence to recognize objects, persons, sounds, shapes, or smells despite intact sensory organs.
7
Question
How is an autoimmune disorder defined and what is its fundamental cause?
Page 1
Answer
An autoimmune disorder is a condition where the body's immune system attacks healthy cells. It is caused by a failure to recognize self-antigens as distinct from foreign invaders.
8
Question
Which cells are responsible for humoral immunity?
Page 1
Answer
B cells are the lymphocytes responsible for humoral immunity, as they produce antibodies.
9
Question
What is the clinical definition of immunocompetence?
Page 1
Answer
Immunocompetence is the ability of the immune system to respond effectively to foreign antigens and maintain internal health.
10
Question
What are the common immune changes associated with aging in older adults?
Page 1
Answer
Older adults experience immunosenescence, characterized by decreased production of T cells, lower B cell response, and a decline in overall immune function.
11
Question
Which patient population is at the highest risk for hypersensitivity reactions?
Page 1
Answer
Patients with a history of allergies, asthma, or previous severe reactions to medications or environmental triggers are at the highest risk.
12
Question
Why are older adults inherently more vulnerable to infections compared to younger adults?
Page 1
Answer
Older adults have weakened immune responses (immunosenescence), thinner skin, potential nutritional deficits, and reduced ability to identify and respond to pathogens quickly.
13
Question
What CD4 count defines a diagnosis of AIDS?
Page 2
Answer
A CD4 T-lymphocyte count of less than 200 cells/mm³ is used to define AIDS.
14
Question
What is the process of HIV seroconversion?
Page 2
Answer
Seroconversion is the period during which an individual develops detectable antibodies to HIV, marking the transition from an HIV-negative to an HIV-positive status in blood tests.
15
Question
Why is adherence to antiretroviral therapy (ART) considered critical in HIV care?
Page 2
Answer
Consistent ART adherence is critical to suppress viral load, prevent drug resistance mutations, restore immune function, and decrease the risk of transmission.
16
Question
How does immunosurveillance protect against cancer development?
Page 2
Answer
Immunosurveillance is the process by which immune cells, particularly natural killer (NK) cells, T cells, and macrophages, identify and eliminate abnormal cells before they develop into tumors.
17
Question
What are the key differences between benign and malignant tumors?
Page 2
Answer
Benign tumors are non-cancerous, encapsulated, grow slowly, and do not metastasize. Malignant tumors are cancerous, grow rapidly, invade surrounding tissues, and can metastasize to other sites.
18
Question
What are the common signs of cancer represented by the CAUTION acronym?
Page 3
Answer
The CAUTION acronym stands for: Change in bowel/bladder habits, A sore that does not heal, Unusual bleeding/discharge, Thickening/lump, Indigestion/difficulty swallowing, Obvious change in wart/mole, and Nagging cough/hoarseness.
19
Question
What is the recommended platelet count threshold that triggers bleeding precautions?
Page 3
Answer
Bleeding precautions are generally initiated when the platelet count falls below 50,000/mm³.
20
Question
What should the nurse do immediately if a radiation implant becomes dislodged?
Page 3
Answer
The nurse should never touch the implant directly; use long-handled forceps to pick it up, place it in a lead-lined container, and notify the radiation safety officer immediately.
21
Question
What is the most reliable indicator of pain in any patient?
Page 4
Answer
The patient's self-report is always the most reliable indicator of pain intensity and quality.