醫學二：100題 ( 包括生理學,生化學,藥理學,病理學等科目及其臨床相關知識 )題庫下載題庫

The only retinal neurons that always transmit visual signals by means of action potentials are the ganglion cells, and they send their signals all the way to the brain through the optic nerve. Otherwise, all the retinal neurons conduct their visual signals by electrotonic conduction, which can be explained as follows.

The importance of electrotonic conduction is that it allows graded conduction of signal strength. Thus, for the rods and cones, the strength of the hyperpolarizing output signal is directly related to the intensity of illumination; the signal is not all or none, as would be the ca...

The only retinal neurons that always transmit visual signals by means of action potentials are the ganglion cells, and they send their signals all the way to the brain through the optic nerve. Otherwise, all the retinal neurons conduct their visual signals by electrotonic conduction, which can be explained as follows.

The importance of electrotonic conduction is that it allows graded conduction of signal strength. Thus, for the rods and cones, the strength of the hyperpolarizing output signal is directly related to the intensity of illumination; the signal is not all or none, as would be the case for each action potential.