Healthcare Fundamentals Set 276 MCQs
Practice 15 questions with answers and concise explanations for General Medical revision.
15
General Medical
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Active recall
How to use: Try each question first. Open the answer only after choosing an option. Revisit the questions you miss.
Q1. A receptor antagonist typically:
- Blocks or reduces receptor-mediated effects
- Always activates a receptor fully
- Always increases enzyme activity
- Always causes sedation
Show answer & explanation
Correct answer: A. Blocks or reduces receptor-mediated effects
An antagonist binds to a receptor without activating it and reduces the effect of an agonist.
Q2. Drug bioavailability refers to:
- Fraction of a dose reaching systemic circulation unchanged
- Drug color
- Tablet hardness
- Number of daily doses
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Correct answer: A. Fraction of a dose reaching systemic circulation unchanged
Bioavailability is the fraction of an administered dose that reaches systemic circulation unchanged.
Q3. Which blood component is most directly involved in primary hemostasis?
- Platelets
- Red blood cells
- Albumin
- Bilirubin
Show answer & explanation
Correct answer: A. Platelets
Platelets adhere and aggregate at sites of vascular injury during primary hemostasis.
Q4. The normal pacemaker of the heart is the:
- SA node
- AV node
- Bundle of His
- Purkinje fibers
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Correct answer: A. SA node
The sinoatrial node normally initiates the heartbeat and acts as the primary cardiac pacemaker.
Q5. Which organ produces bile?
- Liver
- Pancreas
- Kidney
- Spleen
Show answer & explanation
Correct answer: A. Liver
Bile is produced by hepatocytes in the liver and stored and concentrated in the gallbladder.
Q6. Most nutrient absorption occurs in the:
- Small intestine
- Esophagus
- Large intestine
- Stomach
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Correct answer: A. Small intestine
The small intestine is the major site for digestion and absorption of nutrients.
Q7. Which cell type mainly transports oxygen in blood?
- Red blood cell
- Neutrophil
- Platelet
- Lymphocyte
Show answer & explanation
Correct answer: A. Red blood cell
Red blood cells contain hemoglobin and are specialized for oxygen transport.
Q8. Which blood cells are central to immune defense?
- White blood cells
- Red blood cells
- Platelets
- Reticulocytes
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Correct answer: A. White blood cells
White blood cells include several cell types that participate in immune defense.
Q9. The largest organ of the human body is the:
- Skin
- Liver
- Brain
- Lung
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Correct answer: A. Skin
The skin is the largest organ of the human body by surface area and mass.
Q10. How many pairs of cranial nerves are normally described?
- 10
- 11
- 12
- 13
Show answer & explanation
Correct answer: C. 12
Twelve pairs of cranial nerves are classically described.
Q11. A normal human somatic cell usually contains how many chromosomes?
- 23
- 44
- 46
- 48
Show answer & explanation
Correct answer: C. 46
Human somatic cells normally contain 46 chromosomes arranged in 23 pairs.
Q12. In DNA, adenine pairs with:
- Thymine
- Guanine
- Cytosine
- Uracil
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Correct answer: A. Thymine
In double-stranded DNA, adenine pairs with thymine through hydrogen bonding.
Q13. In DNA, guanine pairs with:
- Cytosine
- Thymine
- Adenine
- Uracil
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Correct answer: A. Cytosine
In double-stranded DNA, guanine pairs with cytosine.
Q14. Hydrochloric acid in the stomach is secreted mainly by:
- Parietal cells
- Chief cells
- Goblet cells
- Kupffer cells
Show answer & explanation
Correct answer: A. Parietal cells
Gastric parietal cells secrete hydrochloric acid and intrinsic factor.
Q15. Steam under pressure is the principle used in:
- Autoclaving
- Dry heat oven only
- Filtration
- Radiography
Show answer & explanation
Correct answer: A. Autoclaving
Autoclaving uses saturated steam under pressure to achieve sterilization.
How to Revise This Set
Attempt all 15 questions once without checking answers. Review only the questions you missed, then repeat those in your next revision round.
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