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Nursing Question Bank

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1265 available questions

Biology · Question 491

The mucosa is the _____ layer of the alimentary canal wall.

  1. Outermost
  2. Middle muscular
  3. Innermost
  4. Serosal only
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Correct answer: C

Innermost

The mucosa lines the lumen and is the innermost major layer.

Biology · Question 492

Which respiratory pigment has a higher affinity for oxygen than haemoglobin?

  1. Fibrinogen
  2. Myoglobin
  3. Albumin
  4. Keratin
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Correct answer: B

Myoglobin

Myoglobin binds oxygen more strongly than haemoglobin, supporting oxygen storage in muscle.

Biology · Question 493

The normal pH of human arterial blood is approximately:

  1. 14.0
  2. 7.0
  3. 2.0
  4. 7.4
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Correct answer: D

7.4

Normal arterial blood is maintained near pH 7.35–7.45.

Biology · Question 494

Cooley’s anaemia is another name for:

  1. Leukaemia
  2. Beta-thalassaemia major
  3. Oedema
  4. Pyrosis
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Correct answer: B

Beta-thalassaemia major

Cooley’s anaemia is the severe form of beta-thalassaemia.

Biology · Question 495

The principal homeostatic thermostat in humans is located in the:

  1. Kidney
  2. Hypothalamus
  3. Pituitary gland
  4. Liver
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Correct answer: B

Hypothalamus

The hypothalamus detects temperature changes and coordinates heat-loss and heat-production responses.

Biology · Question 496

Treponema pallidum causes:

  1. AIDS
  2. Gonorrhoea
  3. Genital herpes
  4. Syphilis
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Correct answer: D

Syphilis

Syphilis is caused by the spirochaete bacterium Treponema pallidum.

Biology · Question 497

A male honeybee produces sperm by:

  1. Non-disjunction
  2. Meiosis
  3. Binary fission
  4. Mitosis
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Correct answer: D

Mitosis

Male honeybees are haploid, so their sperm are produced by mitosis.

Biology · Question 498

Which region of an amphibian gastrula can induce formation of a secondary embryonic axis?

  1. Ventral ectoderm
  2. Animal pole only
  3. Yolk plug only
  4. Dorsal lip of the blastopore
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Correct answer: D

Dorsal lip of the blastopore

The dorsal lip acts as the Spemann organiser and can induce a secondary body axis.

Biology · Question 499

Testosterone is secreted principally by the:

  1. Sertoli cells
  2. Seminiferous tubule lumen
  3. Interstitial (Leydig) cells
  4. Epididymis
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Correct answer: C

Interstitial (Leydig) cells

Leydig cells between seminiferous tubules produce testosterone.

Biology · Question 500

Which conditions can interrupt the menstrual cycle?

  1. Normal ovulation alone
  2. Malnutrition
  3. Severe emotional stress
  4. Both severe stress and malnutrition
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Correct answer: D

Both severe stress and malnutrition

Severe stress and inadequate nutrition can disrupt hypothalamic-pituitary-ovarian signalling and cause amenorrhoea.