541. Gorilla like man with large head and hands and protruding Jaws is produced due to

A Over -secretion of thyroxine
B Over -secretion of growth hormone
C Excess of vitamin C in diet
D Excess secretion of TSH
Answer :   Over -secretion of growth hormone
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542. Brain of rabbit differs from that of frog in having

A Large olfactory lobe
B Small hypothalamus
C Small cerebellum
D Corpus callosum
Answer :   Corpus callosum
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543. Myelin sheath covers which of t he following

A Muscle fibre
B Nerve fibre
C Collagen fiber
D Tendons
Answer :   Nerve fibre
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544. Which steroid is used for microbial trans- formation?

A Cortisol
B Cholesterol
C Testosterone
D Progesterone
Answer :   Cholesterol
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545. The thermoregulatory centre in the body is

A Thalamus
B Hypothalamus
C Pons
D Medulla oblongata
Answer :   Hypothalamus
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546. Which hormone is responsible for maintenance of preganancy

A HCG
B Progesterone
C Estrogen
D Prostaglandin
Answer :   Progesterone
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547. The III, VI and XI cranial nerve in mammals are respectively

A Occulomotor, abducens and hypolossal
B Occulomotor, abducens and spinal accessory
C Trochlear, facial and spinal accessory
D Trigeminal, abducens and vagus
Answer :   Occulomotor, abducens and spinal accessory
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548. Effect of anaesthetics on body

A Inhibits Na-K pump
B Kills nerves
C Stops brain functions
D Inactivates skin cells
Answer :   Inhibits Na-K pump
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549. Artificial light, extended work-time and reduced sleep-time disrupt the activity of -

A Posterior pituitary gland
B Thymus gland
C Pineal gland
D Adrenal gland
Answer :   Pineal gland
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550. Insulin is secreted by

A A-cell of islets of langerhans
B Δ-cell of islets of langerhans
C B-cell of islets of langerhans
D Pancreatic acinur cell
Answer :   B-cell of islets of langerhans
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