0
What else can I help you with?
Where is the calcium ions in the cell after the nerve impulse?
After a nerve impulse, calcium ions are primarily found in the cytoplasm of the neuron. They enter the cell through voltage-gated calcium channels that open in response to the depolarization of the membrane. This influx of calcium ions plays a crucial role in neurotransmitter release at the synapse. Subsequently, calcium levels in the cytoplasm are regulated by pumps and buffers to restore baseline levels.
Ions which trigger the realise of neurotransmitter?
Calcium....
What ion must flow into the presynaptic cell in order for it to release neurotransmitter?
Calcium ions (Ca²⁺) must flow into the presynaptic cell for neurotransmitter release. When an action potential reaches the presynaptic terminal, voltage-gated calcium channels open, allowing Ca²⁺ to enter the cell. This influx of calcium triggers the fusion of neurotransmitter-containing vesicles with the presynaptic membrane, leading to the release of neurotransmitters into the synaptic cleft.
What type of ion channel opens on the synaptic end bulb in response to depolarisation?
Calcium (Ca2+) channels open on the synaptic end bulb in response to depolarization (from the action potential), inducing exocytosis of synaptosomes containing neurotransmitter, resulting in neurotransmitter being released into the synaptic cleft...further propagating the signal to the next neuron or set of neurons.
The chemically gated channel known as NMDA allows what ions entry into the nerve cell?
The NMDA channel allows calcium and sodium ions to enter the nerve cell in response to glutamate binding. These ions play key roles in neuronal excitability and synaptic plasticity.
Where is the calcium ions in the cell after the nerve impulse?
After a nerve impulse, calcium ions are primarily found in the cytoplasm of the neuron. They enter the cell through voltage-gated calcium channels that open in response to the depolarization of the membrane. This influx of calcium ions plays a crucial role in neurotransmitter release at the synapse. Subsequently, calcium levels in the cytoplasm are regulated by pumps and buffers to restore baseline levels.
What ion triggers the release of a neurotransmitter at the presynaptic membrane?
Calcium ions trigger the release of neurotransmitter at the presynaptic membrane. When an action potential reaches the presynaptic terminal, it causes voltage-gated calcium channels to open, allowing calcium ions to enter the cell. The influx of calcium ions triggers the fusion of synaptic vesicles with the presynaptic membrane, leading to the release of neurotransmitter into the synaptic cleft.
Ions which trigger the realise of neurotransmitter?
Calcium....
What ion must flow into the presynaptic cell in order for it to release neurotransmitter?
Calcium ions (Ca²⁺) must flow into the presynaptic cell for neurotransmitter release. When an action potential reaches the presynaptic terminal, voltage-gated calcium channels open, allowing Ca²⁺ to enter the cell. This influx of calcium triggers the fusion of neurotransmitter-containing vesicles with the presynaptic membrane, leading to the release of neurotransmitters into the synaptic cleft.
What type of ion channel opens on the synaptic end bulb in response to depolarisation?
Calcium (Ca2+) channels open on the synaptic end bulb in response to depolarization (from the action potential), inducing exocytosis of synaptosomes containing neurotransmitter, resulting in neurotransmitter being released into the synaptic cleft...further propagating the signal to the next neuron or set of neurons.
What is a brief description of the action of the sodium-potassium pump?
The sodium-potassium pump is a transmembrane protein in a cell membrane. It keeps large concentrations of sodium ions outside the cell, and potassium ions inside the cell. It does this by pumping the sodium ions out, and the potassium ions in.
The chemically gated channel known as NMDA allows what ions entry into the nerve cell?
The NMDA channel allows calcium and sodium ions to enter the nerve cell in response to glutamate binding. These ions play key roles in neuronal excitability and synaptic plasticity.
Which statement is true about the movement of the ions through the Na/K pump?
For each molecule of ATP used, the pump moves three positively charged sodium ions out of the cell.
How many potassium ions does the sodium-potassium pump move into a cell if it moves six sodium ions out of the cell?
I think you're looking for three ... over the long run. But the trick is that K+ doesn't need to be pumped in. Membrane proteins act as variable sized pore in the membrane (channels) and the potassium flows in under electrostatic forces ... all the work is done pumping the Na+ out.
What ion enters the axon nerve terminal to cause exocytosis of the neurotransmitter is called?
The ion that enters the axon nerve terminal to trigger neurotransmitter release is calcium (Ca2+). When an action potential reaches the nerve terminal, voltage-gated calcium channels open, allowing calcium ions to flow into the cell and initiate the process of exocytosis of neurotransmitter-containing vesicles.
What moves in the sodium potassium pump?
In the sodium-potassium pump, three sodium ions are pumped out of the cell while two potassium ions are pumped into the cell. This movement is powered by ATP, which is hydrolyzed to provide the energy needed for the pump to function.
The energy-requiring process that moves molecules and ions across a cell membrane against a concentration difference is called?
Active transportation
