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Why are electrical synapses faster than chemical synapses? Andwould certain substances affect transmission at an electricalsynapse?

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Lelia Lubowitz
Lelia LubowitzLv2
28 Sep 2019

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i choose aba for those 3 neuroscience question. but could any one help me if i got right?

5. Patch clamp studies have demonstrated that the following is true…

a. individual channels carry currents that do not predict the macroscopic current carried by the entire population in an axon

b. ion selectivity varies greatly among individual channels of a particular type (e.g. voltage-gated sodium channels)

c. channel behavior includes random fluctuations

d. individual voltage-gated sodium and potassium channels always open when the membrane is depolarized

7. The following is true regarding membrane property known as threshold…

a. it is primarily determined by the phospholipid composition of the membrane

b. it is strongly dependent upon the voltage-dependence of the voltage-gated sodium channels

c. it usually occurs when the membrane is hyperpolarized beyond the resting potential

d. it occurs when there is less depolarizing current than the leakage currents e. mutations in the sodium channel S4 domain would not be expected to influence threshold

8. Which of the following is a potential advantage of electrical synapses over chemical synapses?

a. their strength can be modulated at many different steps of synapse function

b. neurotransmitters can bind to distinct receptor types present at the same synapse

c. they can allow second messengers to pass between neurons

d. signals can pass more slowly preventing over-stimulation in the brain e. they help ensure that neurons are not synchronously active

I am having trouble withthese questions as I was unable to attend lab.


Question 1. Compare the shape ofthe lens in the dogfish and the cow. Why is this differencepresent?


Question 2. What is thesignificance of the calcium in the otoliths?


Question 3. Compare the cerebrumand cerebellum of the dogfish and mink. How would you describe thedifferences in relative size of these structures?


Question 4. Which sensory systemsthat are present in the dogfish are not present in themink?


I am having trouble with these questions as I was unable to attendlab.

PLEASE don't just copy and paste articles unless you're sure theyhave the answer in them.


Question 1. Compare the shape of the lens in the dogfish and thecow. Why is this difference present?


Question 2. What is the significance of the calcium in theotoliths?


Question 3. Compare the cerebrum and cerebellum of the dogfish andmink. How would you describe the differences in relative size ofthese structures?


Question 4. Which sensory systems that are present in the dogfishare not present in the mink?

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