Visual Receptors: Basics: Ms.H

Question 1

What is the BLIND SPOT?

Answer 1

• The POINT OF ENTRY of the OPTIC nerve on the RETINA
• Which is INSENSITIVE to LIGHT

Question 2

What are CONE CELLS?

Answer 2

• Cells in RETINA which TRANSDUCE LIGHT energy into a GENERATOR POTENTIAL
• Based on WAVELENGTH of LIGHT received

Question 3

What are the 3 TYPES of CONE CELLS?

Answer 3

• Red (60%)
• Green (30%)
• Blue (10%)

Question 4

What is the FOVEA?

Answer 4

Where CONE CELLS are LOCATED

Question 5

What is the OPTIC NERVE?

Answer 5

• Nerve which TRANSMITS IMPULSES to the BRAIN
• From the RETINA at the back of the EYE

Question 6

What are PHOTORECEPTORS?

Answer 6

• Receptors that DETECT LIGHT stimuli
• And are LOCATED in the RETINA in ALL MAMMALIAN SPECIES

Question 7

What is the RETINA?

Answer 7

• INNERMOST layer of the EYE
• Contains PHOTORECEPTORS

Question 8

What is RETINAL CONVERGENCE?

Answer 8

MANY ROD cells connected to 1 BI-POLAR CELL

Question 9

What are ROD CELLS?

Answer 9

• Cells in RETINA which TRANSDUCE LIGHT energy into a GENERATOR POTENTIAL
• Based on the INTESNTITY of LIGHT received

Question 10

What is ACUITY?

Answer 10

The DETAIL / RESOLUTION the MAMMALIAN EYE can SEE in

Question 11

What is VISUAL SENSITIVITY?

Answer 11

The ability to DETECT LOW LIGHT INTENSITY