Podcast
Questions and Answers
What is the role of opsins in photoreception?
What is the role of opsins in photoreception?
- They help in closing sodium channels
- They contain photopigments called retinals (correct)
- They transmit action potentials to the brain
- They influence ganglion cells
What is the function of rhodopsin in the retina?
What is the function of rhodopsin in the retina?
- Sense black and white (correct)
- Produce graded potentials
- Close sodium channels
- Trigger G-Protein signaling cascade
How do rod and cone cells respond to light?
How do rod and cone cells respond to light?
- They do not respond to light
- They stay depolarized with light stimulation
- They depolarize and hyperpolarize equally
- They become hyperpolarized with light stimulation (correct)
What is the main type of response from ganglion cells in the retina?
What is the main type of response from ganglion cells in the retina?
Which cells in the retina produce graded potentials?
Which cells in the retina produce graded potentials?
What triggers a G-Protein signaling cascade in photoreceptor cells?
What triggers a G-Protein signaling cascade in photoreceptor cells?
What type of cells synapse with rod or cone cells and relay responses to ganglion cells?
What type of cells synapse with rod or cone cells and relay responses to ganglion cells?
Which cells help define boundaries between images and increase the sensitivity of the eye to moving images?
Which cells help define boundaries between images and increase the sensitivity of the eye to moving images?
What is the main reason for rods and cones being hyperpolarized in light?
What is the main reason for rods and cones being hyperpolarized in light?
What molecule can activate many phosphodiesterase (PDE) molecules, leading to closure of Na+ channels on rod or cone cell membranes?
What molecule can activate many phosphodiesterase (PDE) molecules, leading to closure of Na+ channels on rod or cone cell membranes?
Why do we see in color, according to the text?
Why do we see in color, according to the text?
What type of cells modify electrical signals as they pass from photoreceptors to ganglion cells?
What type of cells modify electrical signals as they pass from photoreceptors to ganglion cells?
Which type of sensory receptor is directly involved in photoreception?
Which type of sensory receptor is directly involved in photoreception?
What is the role of opsins in photoreception?
What is the role of opsins in photoreception?
Which cells in the retina are responsible for transmitting visual information to the brain?
Which cells in the retina are responsible for transmitting visual information to the brain?
What is the role of the retina in photoreception?
What is the role of the retina in photoreception?
Which type of light wave is most efficiently absorbed by the opsins in the human retina?
Which type of light wave is most efficiently absorbed by the opsins in the human retina?
What is the primary function of the ganglion cells in the retina?
What is the primary function of the ganglion cells in the retina?
