TLS Online TPP Program

#Id: 1179

#Unit 7. System Physiology – Animal

Blind spot 

There are no visual receptors over the optic disk.

 

TLS Online TPP Program

#Id: 1180

#Unit 7. System Physiology – Animal

The photosensitive pigment in the rods is called rhodopsin (visual purple).

TLS Online TPP Program

#Id: 1181

#Unit 7. System Physiology – Animal

Rhodopsin is comprised of: 

  Retinal (an aldehyde of vitamin A)

  Opsin protein (GPCR)

TLS Online TPP Program

#Id: 1182

#Unit 7. System Physiology – Animal

Retinal is parallel to the surface of the membrane and is attached to a lysine residue at position 296 in the seventh transmembrane domain.

TLS Online TPP Program

#Id: 1183

#Unit 7. System Physiology – Animal

Neurotransmitter release from the rods of retina- Glutamate

TLS Online TPP Program

#Id: 1184

#Unit 7. System Physiology – Animal

When light strikes the outer segment of Rod cells: 

Na + channels closed 

Hyperpolarizing receptor potential