Question

On an ionic level, what happens when the excitation meets at the cell body at the same time?

a) Summation
b) Inhibition
c) Repolarization
d) Depolarization

Answer 1

When excitation meets at the cell body at the same time, the process that occurs is summation, which is the addition or combining of graded potentials to determine if an action potential will be generated.

Step-by-step explanation:

When excitation meets at the cell body at the same time, the process that occurs is summation. Summation is the addition or combining of graded potentials to determine if an action potential will be generated.

In this case, if the excitation is strong enough and reaches the cell body at the same time, it will cause a large depolarization and can result in the membrane potential reaching threshold and triggering an action potential.

Answer 2

On an ionic level, what happens when the excitation meets at the cell body at the same time is a) Summation

When excitation reaches the cell body at the same time, the combined effect is known as summation. Summation refers to the process by which the postsynaptic potential of a neuron is determined by the combined effects of multiple excitatory and inhibitory signals that arrive at the cell body or dendrites simultaneously or in close succession.

So, the correct answer is: a) Summation. On an ionic level, what happens when the excitation meets at the cell body at the same time is a) Summation.