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Polarized
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What is an unstimulated neuron?
It is a neuron that is at its resting potential, not stimulated by input from other neurons.
A knee-jerk reflex employs motor neurons and what?
it employs sensory and motor neurons
What is a specialized cell that conducts impulses through the nervous system?
Neurons transmit and receive signals in the nervous system
What are the electro physiological methods for studying excitable tissues?
Physiologists use of microelectrodes to measure changes in the electrical properties of the cell membrane and to inject current to activate voltage sensitive channels in the neurons.
Sensory neurons and motor neurons are connected by?
Interneurons
What is an unstimulated neuron?
It is a neuron that is at its resting potential, not stimulated by input from other neurons.
What accounts for the resting membrane potential seen in unstimulated nerve and muscle cells?
Sodium-potassium pump
What effect does the leaking of potassium across the membrane have on the membrane potential of Kevin's neurons?
It makes the inside of the neurons more negative.
Neurons which are wrapped in a fatty membrane are?
myelinated
What cell has slender extentions of the plasma membrane?
Neurons
Is unstimulated a word?
Yes.
What chemicals are used to transmit impulses through the neurons?
the transmission of a nerve impulse along a neuron from one end to the other occurs as a result of chemical changes across the membrane of the neuron. The membrane of an unstimulated neuron is polarized that is there is a difference in electrical.
The resting membrane potential in neurons ranges from?
-60mV to -70mV
Is the membrane of neurons very permeable to Na when at rest?
the same as that to potassium
During depolarization does the neurons membrane become negative?
Yes. Positive ions (sodium) move across the membrane.
What type of membrane transport causes the depolarization phase of the action potential in neurons?
Diffusion
What transmission of the depolarization wave along the neurons membrane?
Action potential
