9) The exocytotic release of neurotransmitter by synaptic vesicles appears to be

Question

9) The exocytotic release of neurotransmitter by synaptic vesicles appears to be responsible for neurotansimitter release in packets of discrete size known as
a) Ketone bodies
b) Angiogenesis
c) Capacitance with its ability to store and separate charges
d) Quanta
e) Nexus and gap junctions
10) Which of the following is the most sensitive to hypoxia?
a) Synapse
b) Nerve fiber
c) Smooth muscle
d) Cardiac muscle
e) Skeletal muscle
11) Free Ca++ triggers the contraction of mammalian smooth muscle by combining directly with:
a) Actin or myosin
b) Calmodulin
c) Tropomyosin
d) Troponin C
e) Curare during Rabbit Head Drop Bioassay
12) Growth of many new blood vesselsin skeletal muscle is termed:
a) Hyperplasia
b) Angiogenesis
c) Macromotor unit
d) Hypertonic state with saline
e) Aneurysm of the cerebral type
13) Familial periodic paralysis is a rare disease associated with a fall in the plasma level of
a) Sodium
b) Potassium
c) Calcium
d) Magnesium
e) Bicarbonate
14) Impaired neuromuscular transmission is seen most often in
a) pheochromochytoma
b) glia cells of blood brain barrier
c) myasthenia gravis and familial periodic paralysis
d) blood brain barrier
15) The most potent chemical inhibitor of cholinesteraste is:
a) Epinephrine
b) Eserine
c) Acetylcholine and botulin toxin
d) Epinephrine, norepinphrine and acetylcholine
e) Norepinephrine, acetylcholine, and curare given together
16) Considering the mechanism of drug action, physostigmine is best classified pharmacologically as:
a) Demyelinating agent
b) Competitor of curare
c) CNS depressant neuromuscular blocking agent
d) Antimuscarinic agent
e) Anticholinerase agent

Explanation / Answer

Answers: 9. d) Quanta 10. b) Nerve fiber 11. d) Tronin C 12. b) Angiogenesis 13. b) Potassium 14. c) myasthenia gravis and familial periodic 15. b) Eserine 16. d) Antimuscarinic agent.

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