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Gala2k [10]
2 years ago
14

Epilepsy may result in motor seizures due to massive synchronous firing of neurons in a small area of the cerebral cortex (epile

ptic focus). Excitation spreads from the focus, involving an increasingly larger area of the cortex. A drug for the treatment of epilepsy would be most effective if it caused which of the following changes in the epileptic focus? A. an increase in the neuron-firing thresholdB. An increase in extracellular Na+ concentrationC. a decrease in axon-membrane permeability to negative ionsD. a decrease in the length of the depolarization stage
Biology
1 answer:
Papessa [141]2 years ago
4 0

Answer: Option A

Explanation:

Epilepsy can be defined as the medical condition in which the central nervous system disorder in which the brain activity becomes abnormal which results in the abnormal behavior, sensation accompanied by loss of awareness.

In this condition a drug that can best treat epilepsy should reduce the activity of neurons in the epileptic focus which are excitatory neurons based on the effect throughout their cortex.

It does so by increasing the  threshold which is required to generate action potential which will decrease the chances that neurons will fire.

This effect will reduce the overall amount of excitation which spreads from epileptic focus throughout the cortex.

hence, the correct answer is option A

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8 0
2 years ago
Suppose that individuals of a particular genetic strain of Drosophila melanogaster reproduce at an earlier age than do other str
Lina20 [59]

Answer:

there is no such thing as a free lunch

Explanation:

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In this senerio, a particular genetic strain of Drosophila melanogaster reproduce at an earlier age than do other strains of this species at the expense of its lifecycle as this will cause a shortage of its lifecycle which is a negative aftermath compared to other strains that do not reproduce early.

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3 years ago
Because connective tissue is found throughout the body, more than just anne marie's joints and skin could be affected by ehlers-
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how do fossils give evidence of continental drift? List 2 examples using fossils found on different land masses.
Ivanshal [37]

Answer:

Explanation:

There are many examples of fossils found on separate continents and nowhere else, suggesting the continents were once joined. If Continental Drift had not occurred, the alternative explanations would be:

The species evolved independently on separate continents – contradicting Darwin’s theory of evolution.

They swam to the other continent/s in breeding pairs to establish a second population.

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Slight rotation between the femur and tibia is possible due to the action of the ____________ muscle.
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Popliteus muscle

from: https://en.m.wikipedia.org/wiki/Popliteus_muscle
4 0
3 years ago
Read 2 more answers
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