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NORCET Human Physiology: practice questions

NORCET · India · All India Institute of Medical Sciences (AIIMS), New Delhi

Original practice questions written to the published syllabus · not past papers
10worked here, free
98written to this exam in this subject
20syllabus units

What this subject covers

How the body holds itself steady, and what it looks like when it stops

In the exams: AIIMS BSc (Hons) Nursing Entrance: Biology (30 marks); NORCET: Prelims — nursing syllabus (80 of 100 questions); Japan National Nursing Examination: Human structure, function and disease (Core across both sections)

Where the 98 questions fall

How our questions for NORCET spread across the units of Human Physiology. Difficulty: 22 easy, 57 medium, 19 hard.

End-of-manual check12
Cells and Transport5
Body Fluids5
Blood5
The Heart At Work5
Blood Pressure5
Breathing5
Oxygen Carriage5
Temperature5
The Deteriorating Patient5
Pain5
What Physiology Is For4
Homeostasis4
Digestion4
The Kidney4
Acid and Base4
Nerves and Muscles4
Hormones4
Defence and Immunity4
Being Examined On This4

10 practice questions, worked

Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.

1 · Homeostasis · medium

How does negative feedback work?

  1. A change triggers a response that amplifies it further
  2. A change is ignored until it becomes life-threatening
  3. A change is corrected only by medical treatment
  4. A change triggers a response that opposes it
Answer and working

D. A change triggers a response that opposes it

Most control works this way: a rise in temperature triggers sweating to bring it down.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

2 · Body Fluids · hard

Which set of bedside observations assesses fluid status without a laboratory?

  1. Temperature, pain score, sleep pattern, appetite and bowel habit
  2. Peak flow, oxygen saturation, chest expansion and breath sounds
  3. Height, body mass index, skin colour, hair texture and grip strength
  4. Fluid balance, daily weight, mucous membranes and pulse
Answer and working

D. Fluid balance, daily weight, mucous membranes and pulse

Intake and output, a change in weight, moistness of mucous membranes, pulse rate and capillary refill each reflect circulating and total body water. The other sets assess other systems.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

3 · Body Fluids · medium

Why do losses from vomiting, diarrhoea and sweating each upset the body differently?

  1. Each fluid carries a different mix of water and electrolytes
  2. Body fluids hold the same electrolytes at the same levels
  3. Urine carries the electrolytes, so other losses are water
  4. Each loss is pure water, so the volume is what differs
Answer and working

A. Each fluid carries a different mix of water and electrolytes

Gastric fluid is rich in acid and chloride, diarrhoea in bicarbonate and potassium, sweat in sodium. Replacing the loss means knowing what was lost, not just how much.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

4 · Blood · medium

A raised white cell count most commonly points to which of these?

  1. Dehydration from poor intake
  2. Infection or inflammation
  3. Iron deficiency anaemia
  4. Low platelet production
Answer and working

B. Infection or inflammation

White cells multiply in response to infection, inflammation and tissue injury. Dehydration concentrates the blood a little but does not by itself raise the count much; anaemia and low platelets concern other cell lines.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

5 · Breathing · hard

Why does a high work of breathing matter even when oxygen saturation is normal?

  1. Breathing hard raises the saturation, so the patient is not at risk
  2. The breathing muscles tire and then carbon dioxide rises
  3. Work of breathing is unrelated to outcome if saturation is normal
  4. A normal saturation shows the breathing muscles are resting
Answer and working

B. The breathing muscles tire and then carbon dioxide rises

A patient can hold a normal saturation by working very hard. When the respiratory muscles fatigue, carbon dioxide rises and saturation falls quickly. Effort is an early warning; saturation is a late one.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

6 · The Kidney · hard

Which change in the blood accompanies acute kidney failure?

  1. A falling creatinine
  2. A falling urea
  3. A rising potassium
  4. A rising pH
Answer and working

C. A rising potassium

Failing kidneys cannot excrete potassium, acid, urea or creatinine. Potassium rises, the blood becomes more acidic (pH falls), and urea and creatinine climb.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

7 · Temperature · medium

A patient with a rising fever is shivering and asking for blankets. Why?

  1. The fever is ending and the body temperature is about to fall
  2. The hypothalamic set point has been raised, so they feel cold
  3. The thermometer is reading too high and the patient is cold
  4. The room is cold, and the fever itself has nothing to do with it
Answer and working

B. The hypothalamic set point has been raised, so they feel cold

Pyrogens reset the thermostat upwards. Until the body reaches the new set point it generates heat by shivering and conserves it by vasoconstriction, so the patient feels cold.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

8 · Pain · easy

How is the sensation of pain produced?

  1. The injured tissue produces pain by itself, without nerves
  2. Pain arises in the blood vessels around the injury
  3. Pain is produced by the mind and lacks a physical basis
  4. Nociceptors signal damage and the brain interprets the signal
Answer and working

D. Nociceptors signal damage and the brain interprets the signal

Pain needs both the signal (nociceptors and spinal pathways) and its interpretation by the brain, which is why mood, fear and attention change how much it hurts.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

9 · Pain · medium

Why can rubbing an injured area ease the pain?

  1. Rubbing releases antibiotics into the tissue
  2. Touch signals compete with pain signals in the cord
  3. Rubbing removes the nerve endings from the area
  4. Rubbing heals the damaged tissue more quickly
Answer and working

B. Touch signals compete with pain signals in the cord

Large touch fibres activate spinal interneurons that inhibit transmission from pain fibres: the gate control theory, also the basis of TENS.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

10 · Being Examined On This · hard

How does physiology apply at the bedside?

  1. It is used by doctors and rarely needed by nurses
  2. It applies to examinations rather than to patient care
  3. Every set of observations shows how the body is coping
  4. It belongs in laboratories rather than on the ward
Answer and working

C. Every set of observations shows how the body is coping

Pulse, pressure, breathing, temperature and consciousness are all readouts of physiology. Reading them as mechanisms is what turns recording into assessment.

Further reading: Laisha original question, written to the SUNYRA nursing manual: Human Physiology

Ten here, 98 in the app. The Laisha app has every practice question we have written to NORCET in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.

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Read the subject

Human PhysiologyThe full study manual, free NORCETFormat, sections and how it has changed

More NORCET practice

Health Assessment and Physical ExaminationNursing Foundations IHuman AnatomyPathophysiologyNursing Foundations IIPharmacologyInfection Prevention and ControlMedication Administration and Safety

Human Physiology for other exams

Japan National Nursing Examination · Japan

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