#1
Which of the following is a hallmark symptom of Parkinson's disease?
Tremors
Dizziness
Hyperactivity
Visual disturbances
#2
What is the primary cause of type 1 diabetes mellitus?
Insulin resistance
Autoimmune destruction of pancreatic beta cells
Obesity
Poor diet
#3
Which hormone is responsible for regulating blood glucose levels?
Insulin
Thyroxine
Adrenaline
Estrogen
#4
Which of the following is a symptom of peptic ulcer disease?
Hypotension
Melena
Polyuria
Hypernatremia
#5
Which of the following is a characteristic feature of rheumatoid arthritis?
Joint deformities
Presence of HLA-B27 antigen
Episodic flares
Asymmetric joint involvement
#6
Which of the following is NOT a risk factor for developing osteoporosis?
Smoking
High calcium intake
Postmenopausal status
Family history of the disease
#7
Which of the following is a characteristic of asthma?
Increased lung compliance
Decreased airway resistance
Bronchoconstriction
Decreased mucus production
#8
What is the pathophysiological basis of multiple sclerosis?
Autoimmune destruction of myelin sheath
Hypertrophy of neurons
Excessive dopamine production
Viral infection of the brain
#9
What is the primary defect in cystic fibrosis?
Excessive mucus production
Decreased insulin secretion
Defective chloride ion transport
Overactive immune response
#10
What is the underlying cause of chronic obstructive pulmonary disease (COPD)?
Alveolar hypoventilation
Excessive lung compliance
Obstruction of airways
Loss of lung elasticity
#11
What is the primary cause of acute renal failure (ARF)?
Chronic hypertension
Excessive fluid intake
Sepsis
Acute tubular necrosis
#12
What is the primary defect in Alzheimer's disease?
Neurofibrillary tangles composed of tau protein
Overproduction of acetylcholine
Loss of dopamine-producing neurons
Increased amyloid-beta protein cleavage
#13
Which of the following is NOT a symptom of myocardial infarction (heart attack)?
Chest pain
Nausea and vomiting
Profuse sweating
Decreased heart rate
#14
What is the characteristic ECG finding in atrial fibrillation?
Prolonged PR interval
Normal sinus rhythm
Irregularly irregular rhythm with absent P waves
Tall, peaked T waves
#15
What is the primary mechanism of action of angiotensin-converting enzyme (ACE) inhibitors?
Blockade of angiotensin II receptors
Inhibition of aldosterone secretion
Inhibition of angiotensin-converting enzyme
Activation of bradykinin receptors
#16
What is the primary pathophysiological defect in systemic lupus erythematosus (SLE)?
Impaired clotting cascade
Increased levels of interleukin-1
Autoimmune attack on multiple organs
Elevated levels of thyroid-stimulating hormone
#17
What is the primary mechanism of action of statins?
Inhibition of angiotensin II receptors
Blockade of beta-adrenergic receptors
Inhibition of HMG-CoA reductase
Stimulation of insulin secretion
#18
What is the primary pathophysiological defect in hemophilia A?
Decreased production of von Willebrand factor
Impaired platelet aggregation
Deficiency of factor VIII
Excessive fibrinolysis