71. Insulin is

A vitamin
B lipid
C hormone
D enzyme
Answer :   hormone
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72. Optic nerve is the

A Fifth cranial nerves
B Second cranial nerve
C Seventh cranial nerves
D Ninth cranial nerves
Answer :   Second cranial nerve
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73. How does steroid hormone influence the cellular activities?

A Changing the permeability of the cell membrane
B Binding to DNA and forming a gene- hormone complex
C Activating cyclic AMP located on the cell membrane
D Using aquaporin channels as second messenger
Answer :   Binding to DNA and forming a gene- hormone complex
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74. Enzyme acetyl cholinesterase is concerned with

A Digestion of protein
B Synthesis of protein
C Digestion of polypeptide
D Conduction of nerve impulse
Answer :   Conduction of nerve impulse
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75. The "butter fly" like structure surrounding the central of human's spinal cord is called

A Funiculus
B Horn
C White
D Gray matter
Answer :   Gray matter
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76. Ions needed for nerve conduction

A Na+
B Ca++
C Mg++
D None of the above
Answer :   Na+
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77. Median eminence is part of

A Anterior pituitary
B Hypothalamus
C Neurohypophysis
D None of the above
Answer :   Neurohypophysis
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78. Secretin stimulates the activity of

A Liver
B Gastric gland
C Pancreas
D Gall-bladder
Answer :   Pancreas
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79. One of the following is genetic

A Simple Goitre
B Exopthalmic
C Sporadic goitre
D None of the above
Answer :   Sporadic goitre
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80. If GABA is released at synapse area then what will happens

A Depolarization of neuron
B Repolarization of neuron
C Hyperpolarization of neuron
D No effect
Answer :   Hyperpolarization of neuron
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