In a dopamine synapse, which of the following would increase synaptic transmissi
ID: 86164 • Letter: I
Question
In a dopamine synapse, which of the following would increase synaptic transmission? (a) A drug that increases MAO expression (b) an MAOI (c) a SSRI (d) a drug that blocks dopamine receptors (e) none of the above A neuron FROM the heart TO the brain is a: (a) Motor neuron (b) afferent neuron (c) sympathetic neuron (d) somatic neuron (e) none of the above Sound is vibration. Which of the following receptors are used in the sensation of sound? (a) Chemoreceptor (b) Osmoreceptor (c) nociceptor (d) mechanorecepor(e) audioreceptorExplanation / Answer
Ans.16) -
a) a drug that increases MAO expression
Dopamine is the organic chemical of catecholamine and phenethylamine families.In the brain, dopamine function as a neurotransmitter that means a chemical realesed by a nurons to send signal to other nerve cells.
In the brain many addictive drugs increases dopamine nuronal activity. The two properties of the addictive stimuli are reinforcing ( i.e.they increase the likelihood that persons will seek repeated exposure to them) and intrinsically rewarding ( i.e. they are perceived as being inherently positive, desirable and pleasurable ).
Monoamine Oxidase ( MAO ) which can breaks down certain neurotransmitters including serotonin, dopamine, epinephrin and norepinephrin.
Ans.17.
c ) - sympathetic nuron.
sympathetic nuron energizes us for fight or flight, which is indicated by an increase in heart rate and in more quiescent moments, the calming part of the nervous system (parasympathetic) calms us down and slows the heart rate.
Ans. 18.
d ) mechanoreceptor
These receptor are respond to mechanical forces such as pressure, destortion and audio signals.these receptors are present in hair cells and play an integral role in the auditory system.The mejority are mechanorecptors are cutaneous.