0
When ACh receptors open what ion causes depolarization of the postsynaptic membrane?
Wiki User
∙ 7y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What causes the inside of the membrane to reverse charge and begin action potential?
Depolarization
What type of membrane transport causes the depolarization phase of the action potential in neurons?
Diffusion
A neurotransmiter that allows sodium ions to leak into a postsynaptic neuron causes?
A neurotransmitter that allows sodium ions to leak into a postsynaptic neuron causes excitatory postsynaptic potentials. The neurotransmitter that is not synthesized in advance and packaged into synaptic vesicles is nitric oxide.
What causes calcium channels in the synaptic knob to open?
depolarization of the presynaptic membrane due to an arriving action potential
What is the presynaptic knob ca2?
Your question isn't very clear.... Presynaptic knob is the neurone before the synapse. Postsynaptic knob is the neurone after the synapse. Calcium ions diffuse into the presynaptic knob down their concentration gradient when an impulse arrives at the presynaptic knob. This causes the vesicles to move towards the presynaptic membrane and fuse with it. This releases the neurotransmitter (e.g. Ach). The Ach diffuses down their concentration gradient in the synaptic cleft then binds with receptors on the post synaptic membrane. This binding causes the Na+ ion channels to open, and the influx of Na+ ions causes depolarisation, and a new action potential in the postsynaptic knob. Then the acetate and choline diffuses back into the presynaptic membrane and is recombined using ATP.
The combining of the neurotransmitter with the muscle membrane receptors causes the membrane to become permeable to sodium ions and blank of the membrane?
Depolarization
Binding of the neurotransmitters with muscle membrane receptors causes the membrane to become permeable to sodium resulting in the influx of sodium ions an what of the membrane?
depolarization
How does neurotransmitters initiate depolarization?
Let's picture a presynaptic neuron, a synaptic cleft, and a postsynaptic neuron. An action potential reaches the terminal of a presynaptic neurone and triggers an opening of Ca ions enters into the depolarized terminal. This influx of Ca ions causes the presynaptic vesicles to fuse with the presynaptic membrane. This releases the neurotransmitters into the synaptic cleft. The neurotransmitters diffuse through the synaptic cleft and bind to specific postsynaptic membrane receptors. This binding changes the receptors into a ion channel that allows cations like Na to enter into the postsynaptic neuron. As Na enters the postsynaptic membrane, it begins to depolarize and an action potential is generated.
Binding of the Acetylcholine to receptors causes a by opening what channels that permit both potassium and sodium to permeate the membrane?
Nicotinic by depolarization
The greater influx of sodium ions results in what of the membrane?
depolarization
What causes the inside of the membrane to reverse charge and begin action potential?
Depolarization
Is depolarization the same as contraction in the heart?
The nerve impulse causes the release of acetylcholine from the motor end plate. This causes the depolarization of the membrane of the adjacent muscle cell.
What type of membrane transport causes the depolarization phase of the action potential in neurons?
Diffusion
A neurotransmiter that allows sodium ions to leak into a postsynaptic neuron causes?
A neurotransmitter that allows sodium ions to leak into a postsynaptic neuron causes excitatory postsynaptic potentials. The neurotransmitter that is not synthesized in advance and packaged into synaptic vesicles is nitric oxide.
What causes calcium channels in the synaptic knob to open?
depolarization of the presynaptic membrane due to an arriving action potential
How does an impulse travel from a presynaptic neuron to a postsynaptic neuron?
When the action potential reaches the button(axon terminal) of the presynaptic neuron the depolarization causes voltage gated calcium channels to open increasing intracellular calcium content. This causes synaptic vesicles to fuse to the membrane and release neurotransmitters that bind to the post synaptic neuron and create a chemical action potential.
When hinding of the neurotransmitters with muscle membrane receptors causes the membrane to become permeable to sodium resulting in the influx of sodium ions and what membrane?
action potential of the sarcolemma(the membrane)
