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When a resting nerve fiber is polarized sodium and potassium ions is higher on the inside of its membrane?
A resting nerve fiber is polarized because the concentration ofNa+ is higher on the outside and K+ is higher on the inside.
When a nerve fiber is polarized the concentration is what?
When a nerve fiber is polarized, the concentration of sodium ions is higher outside the cell, while the concentration of potassium ions is higher inside the cell. This concentration gradient helps maintain the resting potential of the neuron.
What is a nerve membrane at rest called?
At rest, the nerve membrane is referred to as polarized, meaning there is a difference in electrical charge between the inside and outside of the cell. This difference is maintained by the sodium-potassium pump, which actively transports ions across the cell membrane.
How is a resting potential achieved in the nervous system?
The resting nerve cell is not being stimulated to send a nerve impulse
How does nerve fiber become depolarized?
A nerve fiber becomes polarized when the resting potential of the membrane changes. It starts out with an unequal distribution of charges- the outside is more positive and the inside is less positive. (Sodium (Na+) is in a higher concentration on the outside of the membrane and Potassium (K+) is in a lower concentration on the inside of the membrane.) A stimulus changes the gradient- when more Na+ flows in, the resting potential changes and polarization occurs, allowing for an action potential to be propagated down the axon.
When an axon is not conducting a nerve impulse and there is more sodium outside the axon and more potassium inside the axon it is referred to as what?
When an axon is not conducting a nerve impulse and there is a higher concentration of sodium ions outside the axon and a higher concentration of potassium ions inside, it is referred to as the resting potential. During this state, the axon's membrane is polarized, with a negative charge inside relative to the outside. This resting potential is crucial for the generation of action potentials when the neuron becomes activated.
What ion determines the resting membrane potential of nerve and muscle?
The potassium ion (K+) plays a major role in determining the resting membrane potential of nerve and muscle cells. This is because these cells have a higher permeability to potassium ions than other ions, such as sodium ions. As a result, the movement of potassium ions out of the cell through potassium leak channels leads to the establishment and maintenance of the negative resting membrane potential.
When a nerve is at its resting potential the inside charge is?
-70 millivolts.
Parasympathetic innervation of the stomach is provided by?
Parasympathetic innervation of the stomach is provided by the vagus nerve. The vagus nerve is located in the brain and is also known as the pneumogastric nerve.
What is the inside charge of a nerve at its resting potentail?
The inside of a nerve cell is negatively charged at its resting potential, typically around -70 millivolts. This resting membrane potential is maintained by the differential distribution of ions across the cell membrane, with more sodium and calcium ions outside the cell and more potassium ions inside.
How does the nerve growth factor protein contribute to the development and maintenance of the nervous system?
The nerve growth factor protein helps in the growth, survival, and maintenance of nerve cells in the nervous system. It promotes the development of nerve cells and helps in their communication, which is essential for the proper functioning of the nervous system.
What accounts for the resting membrane potential seen in unstimulated nerve and muscle cells?
Sodium-potassium pump
