Unit 5: Human Physiology — Online MCQ Test
BIOLOGY · NEET (All) · NEET
Practice Unit 5: Human Physiology with a free chapter-wise online MCQ test.
This chapter covers: Breathing and Respiration: Respiratory organs in animals (recall only); Respiratory system in humans; Mechanism of breathing and its regulation in humans-Exchange of gases transpor....
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Unit 5: Human Physiology — Important Questions & Answers
Identify the wrong statement with reference to transport of oxygen.
- A. Partial pressure of CO2 can interfere with O2 binding with haemoglobin.
- B. Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin.
- C. Low pCO2 in alveoli favours the formation of oxyhaemoglobin.
- D. Binding of oxygen with haemoglobin is mainly related to partial pressure of O2.
Answer: B. Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin.
High H+ concentration (lower pH) in systemic tissues facilitates the dissociation of oxygen from hemoglobin (Bohr effect), not its formation. Alveoli have low H+ (higher pH), which favours oxygenation.
High H+ concentration (lower pH) in systemic tissues facilitates the dissociation of oxygen from hemoglobin (Bohr effect), not its formation. Alveoli have low H+ (higher pH), which favours oxygenation.
Match the following diseases with the causative organism and select the correct option. Column-I (Disease) Column-II (Organism) (a) Typhoid (i) Wuchereria (b) Pneumonia (ii) Plasmodium (c) Filariasis (iii) Salmonella (d) Malaria (iv) Haemophilus
- A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
- C. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- D. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
Answer: A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
Typhoid is caused by Salmonella typhi, Pneumonia by Haemophilus influenzae, Filariasis by Wuchereria bancrofti, and Malaria by Plasmodium species.
Typhoid is caused by Salmonella typhi, Pneumonia by Haemophilus influenzae, Filariasis by Wuchereria bancrofti, and Malaria by Plasmodium species.
Select the correct statement.
- A. Glucagon is associated with hypoglycemia.
- B. Insulin acts on pancreatic cells and adipocytes.
- C. Insulin is associated with hyperglycemia.
- D. Glucocorticoids stimulate gluconeogenesis.
Answer: D. Glucocorticoids stimulate gluconeogenesis.
Glucocorticoids (like cortisol) promote gluconeogenesis, lipolysis, and proteolysis. Glucagon increases blood glucose (hyperglycemia). Insulin is hypoglycemic and acts primarily on hepatocytes and adipocytes.
Glucocorticoids (like cortisol) promote gluconeogenesis, lipolysis, and proteolysis. Glucagon increases blood glucose (hyperglycemia). Insulin is hypoglycemic and acts primarily on hepatocytes and adipocytes.
Select the option including all sexually transmitted diseases.
- A. Gonorrhoea, Malaria, Genital herpes
- B. AIDS, Malaria, Filaria
- C. Cancer, AIDS, Syphilis
- D. Gonorrhoea, Syphilis, Genital herpes
Answer: D. Gonorrhoea, Syphilis, Genital herpes
Gonorrhoea, syphilis, and genital herpes are all classic examples of sexually transmitted infections (STIs). Malaria, filaria, and cancer are not primarily sexually transmitted.
Gonorrhoea, syphilis, and genital herpes are all classic examples of sexually transmitted infections (STIs). Malaria, filaria, and cancer are not primarily sexually transmitted.
Which of the following structures or regions is incorrectly paired with its function? (1) Hypothalamus: production of releasing hormones and regulation of temperature, hunger and thirst. (2) Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement. (3) Medulla oblongata: controls respiration and cardiovascular reflexes. (4) Corpus callosum: band of fibers connecting left and right cerebral hemispheres.
- A. Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
- B. Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
- C. Medulla oblongata : controls respiration and cardiovascular reflexes.
- D. Corpus callosum : band of fibers connecting left and right cerebral hemispheres.
Answer: B. Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
The limbic system is associated with emotions, motivation, memory, and olfaction — not with controlling movement or simply interconnecting brain regions. The description given (fibre tracts interconnecting regions, controls movement) is more characteristic of the corpus callosum and cerebellum, respectively. Hence option (2) is incorrectly paired.
The limbic system is associated with emotions, motivation, memory, and olfaction — not with controlling movement or simply interconnecting brain regions. The description given (fibre tracts interconnecting regions, controls movement) is more characteristic of the corpus callosum and cerebellum, respectively. Hence option (2) is incorrectly paired.