please answer all the questions 2.Place the following events in the order they o
ID: 3520465 • Letter: P
Question
please answer all the questions
2.Place the following events in the order they occur in the phototransduction cascade.
Light interacts with a molecule of retinal causing isomerization
Transducin is activated
An opsin molecule is activated
Phosphodiesterases are activated
cGMP is degraded
the photoreceptor hyperpolarizes
cyclic nucleotide-gated channels close
the amount of neurotransmitter released decreases
2. You are a scientist studying mechanosensation, and are performing electrical recordings on a single mechanosensory axon that innervates a finger. You find that when slight pressure is applied to the finger, the axon responds with multiple action potentials that do not decrease in frequency over time. You have likely found an axon associated with which cell type/structure?
a) Merkel cells
b) Pacinian corpuscles
c) Meissner’s corpuscles
d) None of the above
3. What does it mean to say that the Cerebrum is "lateralized"?
4. A patient is badly burned, and much of the epidermis is destroyed, along with the most superficial layers of the dermis. Which mechanosensory function is most likely to be retained in this patient?
a) The ability to detect slight mechanical indentation of the skin
b) The ability to detect low frequency vibration
c) The ability to detect high frequency vibration
d) None of the above
5. An inhibitor that broadly targets G protein-coupled receptors (GPCR) would not affect...
a) olfaction
b) vision
c) umami tase
d) salt taste
6. Which of the following sensory systems does NOT relay information through the thalamus?
a) visual
b) auditory
c) gustatory
d) olfactory
7. Senses work together to provide accurate/meaningful information about the environment around us. For example, gustation and olfaction work together closely to provide a broad range of flavors in food & drink (imagine when you had a cold and could only taste the basic flavors).
8. What's another example of two sensory systems working together very closely? What happens when that cooperation is interrupted?
9. The somatosensory homunculus shows that the __________receives the greatest representation in the primary somatosensory cortex.
a) eyes
b) fingers
c) tongue
d) genitals
e) lips
10The somatosensory homunculus shows that the __________receives the greatest representation in the primary somatosensory cortex.
a) eyes
b) fingers
c) tongue
d) genitals
e) lips
11. How does an animal interpret the location of a sound? What part of the brain is responsible for integrating this information?
12. What is lateral inhibition, and in what sensory systems is this used?
a) Merkel cells
b) Pacinian corpuscles
Explanation / Answer
2 .A.light interacts with a molecule of retinal causing isomerization.
b.An opsin G protein is activated.
c.transduction is activated.
d.phosphodiesterases are activated.
e.cyclic nucleotide gated channels close .
f.the photoreceptor hyperpolarizes.
g.the amount of neurotransmitter released by A rod or cone decreases.
Qno2.pacunian corpuscles. they are responsible for sensitivity to vibration and pressure .
Qno3 .lateralization of the brain means some neural functions or cognitive processes to be specialized to the cerebrum sides .it means the sides are not same .they have functional specialization.
Qno5. vision .
Qno6.c.gustatory thalamus .
Qno9.e
lips
10.e.lips.
11.Auditory system .the sound waves enter the ear and pass through ear canal and strike the tympanic membrane of ear or ear drum and cause vibration to the 3 bones connected to membrane .bones are vibrated and then the waves pass through cochlea to the brain
primary auditory cortex of brain is responsible for it.
12.lateral inhibition is the capacity of an excited neuron to reduce the activity of it's neighbours. it disables action potentials .It occurs when the activity of one cell suppress the activity of neighbour cells.
it's used in visual sensory system or eyes by optic nerves.
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