Basic Cellular Physiology
Explain homeostasis, membranes, transport, excitability and cellular responses underpinning acute physiology.
How to prepare for MRCEM Primary
Protect Anatomy and Physiology, which together form two-thirds of the paper, while retaining deliberate coverage of all four smaller categories and their official subcategories.
Core concepts
Concept 1
Feedback control, body-fluid compartments, membrane transport, osmolarity, acid-base principles, membrane potentials, action potentials, muscle and cellular metabolism.
Exam cue: Name the structure, mechanism, organism, medicine action or evidence measure being tested.
Concept 2
Relate a change in concentration, gradient or membrane function to its direction of movement and physiological consequence.
Exam cue: Connect the recalled fact to one clinically relevant emergency-care consequence.
Concept 3
Identify cellular mechanisms behind dangerous electrolyte, osmotic, acid-base and temperature disturbances.
Exam cue: Check units, direction, anatomical level, timing and the exact lead-in before selecting one answer.
Concept 4
Keep revision at the detailed applied basic-science level defined by the RCEM Basic Sciences Curriculum rather than drifting into higher clinical-management knowledge.
Risk pitfalls and guardrails
Using a memorised normal value without distinguishing compartment, concentration, charge, gradient and regulatory response.
Guardrail: Do not select an answer because it is partly true; test it against every word of the lead-in.
Choosing an option that is partly plausible rather than the single option that is fully correct.
Guardrail: Do not select an answer because it is partly true; test it against every word of the lead-in.
Turning a basic-science item into a management question beyond the Primary remembering-and-understanding boundary.
Guardrail: Do not select an answer because it is partly true; test it against every word of the lead-in.
Memory anchors
Basic Cellular Physiology: scope
Feedback control, body-fluid compartments, membrane transport, osmolarity, acid-base principles, membrane potentials, action potentials, muscle and cellular metabolism.
Basic Cellular Physiology: applied link
Relate a change in concentration, gradient or membrane function to its direction of movement and physiological consequence.
Basic Cellular Physiology: safety boundary
Identify cellular mechanisms behind dangerous electrolyte, osmotic, acid-base and temperature disturbances.
Basic Cellular Physiology: common trap
Using a memorised normal value without distinguishing compartment, concentration, charge, gradient and regulatory response.
Basic Cellular Physiology: Primary sequence
Recall the underlying structure or mechanism, connect it to the emergency-care finding, exclude the main safety trap, then choose the single fully correct option.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which membrane process moves a solute down its concentration gradient without metabolic energy?
The sodium-potassium ATPase moves which ions per ATP hydrolysed?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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