0
What is the name of the 1rst phase of the action potential that is caused by the inward movement of sodium?
Wiki User
∙ 11y ago
repolarization
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What happens when the permeability of a resting axon to sodium ion changes?
Inward movement of sodium ions will increase and the membrane will depolarize
The surface tension of water is caused by the water molecules on the surface experiencing?
a net inward force, due mostly to hydrogen bonding.
Is the inward force among the molecules of a liquid?
The inward force among the molecules of a liquid is Surface Tension
Is viscosity the inward force among the molecules of a liquid?
Yes
How wiil you describe the pathway of oxygen in the breathing system?
Inward only.
The plateau portion of the action potential in contractile cardiac muscle cells is due to?
Slow inward diffusion of Ca2+
What causes the rapid change in the resting membranes potential that initiates an action potential?
In muscle cells the inward current is a sodium + calcium flow through acetycholine activated channels as well as through voltage sensitive calcium channels.
Movement that turns the sole of the foot inward is an example of?
inversion
Which term describes the simultaneous inward movement of the eyes toward each other?
accommodation
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell the membrane potential will?
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell, the membrane potential will depolarize, meaning the inside of the cell becomes less negative. This can trigger an action potential if the depolarization reaches the threshold level.
What establishes the threshold of an action potential?
The threshold potential for an action potential is the value of the membrane voltage needed to result in the generation of a full-blown action potential. Physiologically, it is the membrane voltage at which the inward sodium current exceeds the outward potassium current, triggering a positive feedback cycle that defines the early part (rising phase) of the action potential.
What is the difference between fall in demand and contraction in demand?
A contraction in demand is caused by an increase in Price and illustrated by a movement up the demand curve. A decrease in demand is caused by any non-price factor (e.g. advertising, tastes and preferences and price of substitute goods) and is illustrated by an inward shift in the demand curve.
What is moving the sole of the foot outward at the ankle called?
Plantar abduction. Movement inward is adduction. Upward movement of the foot is called dorsiflexion. Downward movement of the foot is called plantar flexion.
What happens if the permeability of a resting axon to sodium ion increases?
inward movement of sodium will increase and the membrane will depolarize.
What system of movement do squids have?
they glide with the wave under the surface. they spread out there tenticles and then push them inward to move forward.
What is the medical term meaning the simultaneous inward movement of both eyes to maintain single binocular vision?
convergenceconvergence
WhatConversion of a stimulus into a generator potential is?
Receptor potential, a type of graded potential, is the transmembrane potential difference of a sensory receptor. A receptor potential is often produced by sensory transduction. It is generally a depolarizing event resulting from inward current flow. The influx of current will often bring the membrane potential of the sensory receptor towards the threshold for triggering an action potential. A receptor potential is a form of graded potential, as is a generator potential. It arises when the receptors of a stimulus are separate cells. An example of this is in a taste bud, where taste is converted into an electrical signal sent to the brain. When stimulated the taste bud triggers the release of neurotransmitter through exocytosis of synaptic vesicles from the presynaptic membrane. The neurotransmitter molecules diffuse across the synaptic cleft to the postsynaptic membrane. A postsynaptic potential is then produced in the first order neuron, and if the stimulus is strong enough to reach threshold this may generate an action potential which may propagate along the axon into the central nervous system
