Answered

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2.
Qual das seguintes afirmativas descreve corretamente um aspecto da transmissão sinaptica?
AOs neurotransmissores são rapidamente removidos da fenda sinaptica por enzimas de degradaçã
superexcitação do neurônio pós-sináptico.
O potencial de ação pós-sináptico resultante da ligação do neurotransmissor ao receptor é sempr
levando à geração de um novo potencial de ação no neurônio pós-sináptico.
COs canais iônicos controlados por ligantes na membrana pós-sináptica permitem a entrada de íon
resultando em uma mudança de polarização na célula pós-sinȧptica.
A transmissão sináptica é sempre unidirecional, com os neurotransmissores viajando do axônio pr
o dendrito pós-sinȧptico.

Sagot :

GinnyAnswer

Final answer:

Synaptic transmission involves neurotransmitter binding to ion channels, leading to membrane potential changes and impulse formation, aiding rapid communication.


Explanation:

Transmission of Signals at Chemical Synapses

One key aspect of synaptic transmission is the binding of neurotransmitters to ligand-gated ion channels on the postsynaptic membrane, causing depolarization or hyperpolarization. The neurotransmitter is then removed from the synaptic cleft either enzymatically or through reuptake, allowing the postsynaptic membrane to reset for further signaling.

When a neurotransmitter like acetylcholine binds to its receptor on the postsynaptic cell, ion channels open, changing the membrane potential and initiating impulse formation in the next neuron or receptor cell. This process ensures rapid communication between neurons for various physiological functions.

Key Takeaways:

  • Neurotransmitter binding to ligand-gated ion channels
  • Enzymatic degradation and reuptake of neurotransmitters
  • Rapid signaling at chemical synapses

Learn more about Chemical Synapses here:

https://brainly.com/question/9206844


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