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Does a stimulus traveling toward a synapse appear to open calcium ion channels in the axon terminal?
Wiki User
∙ 12y ago
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Wiki User
∙ 12y ago
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A calcium ion channel will allow?
Only calcium ion channels to pass through it.
The part of the sarcoplasmic reticulum where calcium ions are stored called?
Terminal Cisternae
Does calcium form a cation or a anion?
The atomic number of calcium is 20 and its electronic configuration is 2,8,8,2. Calcium atom tends to lose the 2 valence electrons and becomes positively charged calcium ion. Positively charged ions get attracted towards the cathode i.e. the negative terminal in an electric cell. Hence, positively charged ions are known as cations. Calcium is a cation.
What triggers the release of acetylcholine from a synaptic terminal?
Limbic system, a part of nervous system releases Acetyl colin
What element make up calcium?
Calcium is an element, so calcium makes up calcium.
In a neuron where are voltage-gated calcium channels located?
Found in the terminal
When an action potential arrives at the axon terminal of motor neuron which ion channels open?
voltage-gated calcium channels
What does the long refractory period observed in cardiac muscle mean?
it means that no matter what stimulus is applied the cardiac muscle will not be able to contract
What type of ion channels does an actions potential in the axon terminal of a motor neuron open?
voltage-gated calcium ion channel
A concept map demonstrating the events of neurotransmitter?
Action potential reaches the action terminal of a nerve cell. This triggers calcium gated ion channels in the axon terminal to open, calcium rushes in. This causes vesicles filled with neurotransmitter to fuse to the membrane and dump the neurotransmitter into the synaptic cleft by exocytosis.
Which of these is a humoral stimulus for hormone release?
calcium
What is stored in the terminal cisternae?
calcium
What is normally stored in terminal cisternae?
Calcium
Normally stored in the terminal cisternae?
Calcium
What transfers the nerve impulse from one neuron to another cell at the synapse?
When the sodium ions that entered the cell through the ion channels diffuse into the axon terminal of the neuron, they activate voltage-gated calcium ion channels. As calcium ions flow into the cell, neurotransmitters are released from the cell. These neurotransmitters diffuse across the synapse and activate sodium ion channels in the post-synaptic cell, allowing sodium to flow in and depolarize the cell enough to start another action potential.
A calcium ion channel will allow?
Only calcium ion channels to pass through it.
What part of a neuron would probably be affected most by the application of Novocain?
Novocain blocks calcium channels. Voltage-dependent calcium channels are a group of ion channels found in the membrane of excitable cells such as the axons of neurons and glial cells.
