BIOL 100 Lecture Notes - Lecture 3: Hemoglobin, Active Transport, Bone Marrow

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28 Jul 2015
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Interneurons exchange information between neurons and perform complex computations that produce thought, complex motor movements, and behavior: all interneurons are stationed within the cns, motor neurons carry specific instructions to effector cells like skeletal muscles. Mostly potassium which has a different concentration across the membrane resulting in a negative voltage. Sodium ion is responsible for the ap in that the membrane permeability to sodium changes and as a result the negative signal of the neuronal membrane becomes positive. The second neuron, a motor neuron, sends a signal back down to the leg causing a contraction of the quads making the leg jerk. This is the simplest neuronal circuit because it only comprises of two neurons: at the same time, another circuit is signaling to affect the hamstring muscles during the response. The sensory neuron signals an interneuron which in this case inhibits motor neurons attached to the hamstring muscle and prevents its contraction.

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