PSB 3002 EXAM #2 QUESTIONS & ANSWERS
What are the five stages of the life cycle of a neurotransmitter? - Answers -1. Synthesis
- involves precursors and enzymes
2. Storage - in vesicles; involves vesicular transporter
3. Release - in response to action potential arriving at axon terminal
4. Binding to a receptor - excitatory (EPSP) vs. inhibitory (IPSP) effects
5. Inactivation (enzymatic; reuptake via transporter)
Functions of ACh in CNS - Answers -REM sleep, helps with learning, and regulates
hippocampus (learning and memory)
What is electromagnetic radiation and how are colors perceived? - Answers -A kind of
radiation including visible light, radio waves, gamma rays, and X-rays, in which electric
and magnetic fields vary simultaneously.
Different colors are perceived based on how many nanometers the wavelength is.
What electromagnetic radiation wavelengths are visible to the human eye? - Answers -
Wavelengths between 380 - 760 nm
How is wavelength measured? - Answers -In nanometers, from crest to crest
Hue: What determines the hue, what waves are violet, and what waves are red? -
Answers -based on wavelength
(if waves very close together, violet; if very far apart, red)
Saturation - Answers -purity of light (i.e., how many different wavelengths present)
When is color pure/saturated? - Answers -If all the radiation is the same wavelength.
How does a color become less saturated? - Answers -An increase in other wavelengths
When do we perceive the color white? - Answers -When all visible wavelengths are
present.
What is brightness and how does the wave determine the brightness? - Answers -
Brightness = intensity
Height of the light wave
Retina: What part of the eye is it and what is it responsible for? - Answers
, -a. Inner lining of the eye
b. Image must be focused here for vision to occur
c. Part of the brain
Layers of the retina, starting with the deepest. - Answers
-i. Photoreceptive layer; deepest (contains rods & cones)
ii. Bipolar cell layer
iii. Ganglion cell layer
How are the layers of the retina connected? - Answers -Synaptic connections with
photoreceptors
What are the five stages of the life cycle of a neurotransmitter? - Answers -1. Synthesis
- involves precursors and enzymes
2. Storage - in vesicles; involves vesicular transporter
3. Release - in response to action potential arriving at axon terminal
4. Binding to a receptor - excitatory (EPSP) vs. inhibitory (IPSP) effects
5. Inactivation (enzymatic; reuptake via transporter)
Functions of ACh in CNS - Answers -REM sleep, helps with learning, and regulates
hippocampus (learning and memory)
What is electromagnetic radiation and how are colors perceived? - Answers -A kind of
radiation including visible light, radio waves, gamma rays, and X-rays, in which electric
and magnetic fields vary simultaneously.
Different colors are perceived based on how many nanometers the wavelength is.
What electromagnetic radiation wavelengths are visible to the human eye? - Answers -
Wavelengths between 380 - 760 nm
How is wavelength measured? - Answers -In nanometers, from crest to crest
Hue: What determines the hue, what waves are violet, and what waves are red? -
Answers -based on wavelength
(if waves very close together, violet; if very far apart, red)
Saturation - Answers -purity of light (i.e., how many different wavelengths present)
When is color pure/saturated? - Answers -If all the radiation is the same wavelength.
How does a color become less saturated? - Answers -An increase in other wavelengths
When do we perceive the color white? - Answers -When all visible wavelengths are
present.
What is brightness and how does the wave determine the brightness? - Answers -
Brightness = intensity
Height of the light wave
Retina: What part of the eye is it and what is it responsible for? - Answers
, -a. Inner lining of the eye
b. Image must be focused here for vision to occur
c. Part of the brain
Layers of the retina, starting with the deepest. - Answers
-i. Photoreceptive layer; deepest (contains rods & cones)
ii. Bipolar cell layer
iii. Ganglion cell layer
How are the layers of the retina connected? - Answers -Synaptic connections with
photoreceptors
