ABA is reported to promote accumulation of H2O2 in leaf tissues and enhance gene expression and enzyme activity for SOD, APX, and CAT

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#Unit 7. System Physiology – Animal

Neurotransmitter release from the rods of retina- Glutamate

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#Unit 7. System Physiology – Animal

When light strikes the outer segment of Rod cells: 

Na + channels closed 

Hyperpolarizing receptor potential

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#Unit 7. System Physiology – Animal

The hyperpolarization of rod cells:

Reduces the release of glutamate

Generates a signal in the bipolar cells

Leads to AP in ganglion cells 

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#Unit 7. System Physiology – Animal

Retinal ganglion cells contain melanopsin.

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#Unit 7. System Physiology – Animal

Types of retinal ganglion cells:

large ganglion cells (magno, or M cells)

small ganglion cells (parvo, or P cells)

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#Unit 7. System Physiology – Animal

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