Biology Nervous Coordination UHS 2023
PMDC Verified Question 39 of 86
The chemical messengers that transmit action potential across the synapse in the form of chemicals are?
A
Synaptic knob of synapse
B
Reflex actions
C
Neurotransmitters
D
Acetylcholinesterase
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Neurotransmitters
Concept:

Electrical action potentials cannot bridge the physical gap of a synapse.

Solution:

  • To continue the signal, the presynaptic neuron releases endogenous chemical agents known as neurotransmitters. These diffuse across the cleft and bind to receptors, sparking a new electrical potential in the next cell.


Why other options are incorrect:

  • Synaptic knob: The physical anatomical structure that holds the vesicles.


  • Acetylcholinesterase: An enzyme that destroys the messenger, rather than transmitting it.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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