Large quantities of positive potassium ions diffuse out of the SA node.

TLS Online TPP Program

#Id: 1186

#Unit 7. System Physiology – Animal

Retinal ganglion cells contain melanopsin.

TLS Online TPP Program

#Id: 1187

#Unit 7. System Physiology – Animal

Types of retinal ganglion cells:

  large ganglion cells (magno, or M cells)

  small ganglion cells (parvo, or P cells)

TLS Online TPP Program

#Id: 1188

#Unit 7. System Physiology – Animal

A lesion that interrupts one optic nerve causes blindness in that eye.

TLS Online TPP Program

#Id: 1189

#Unit 7. System Physiology – Animal

Homonymous (same side of both visual fields) Hemianopia (half blindness)

TLS Online TPP Program

#Id: 1190

#Unit 7. System Physiology – Animal

A lesion in one optic tract causes blindness in half of the visual field

TLS Online TPP Program

#Id: 1191

#Unit 7. System Physiology – Animal

Heteronymous (opposite sides of the visual fields) Hemianopia  A lesions in the optic chiasm