Question

Please No Explanation just ANSWER A,b,c,etc! QUESTION 24 Fifty neurons release excitatory neurotransmitters onto the dendrites...

Please No Explanation just ANSWER A,b,c,etc!

QUESTION 24

  1. Fifty neurons release excitatory neurotransmitters onto the dendrites and body of neuron “A.” Neuron A reaches threshold and fires an action potential. This is an example of

    saltatory summation.

    continuous summation.

    spatial summation.

    temporal summation.

  2. Which of the following terms does not belong with the others?

    sodium

    IPSP

    excitatory

    depolarize

  3. 2 points   

    QUESTION 27

  4. Which one of the following terms does not belong with the others?

    graded potential

    depolarizing phase

    action potential

    voltage-gated Na+ channel

  5. 2 points   

    QUESTION 28

  6. Which of the following is NOT a mechanism for removing neurotransmitters from a synapse?

    neurotransmitters enter the postsynaptic cell through the chemical-gated channels

    neurotransmitters are broken down by enzymes

    neurotransmitters are reabsorbed by the presynaptic cell

    neurotransmitters diffuse away from the synapse

  7. 2 points   

    QUESTION 29

  8. Depolarization is the result of ________ membrane permeability to _____ ions.

    increased, potassium (K+)

    decreased, sodium (Na+)

    increased, sodium (Na+)

    decreased, potassium (K+)

  9. 2 points   

    QUESTION 30

  10. When enough excitatory stimuli act on a neuronal cell, _____-gated Na channels on the axon hillock           open.

    voltage

    mechanical

    ligand

    chemically

  11. 2 points   

    QUESTION 31

  12. During the repolarization phase of the action potential, it is correct to say that

    a. the cell's permeability to sodium increases

    b. the cell's permeability to sodium decreases

    c. the cell's permeability to potassium increases

    both a and c are true

    both b and c are true

    a. the cell's permeability to sodium increases

    both b and c are true

    c. the cell's permeability to potassium increases

    b. the cell's permeability to sodium decreases

  13. 2 points   

    QUESTION 32

  14. Resting membrane potential is defined as

    the movement of action potentials along a resting axon

    the movement of sodium ions outside the membrane and the movement of potassium ions insode the membrane.

    the movement of ions along a resting axon

    the difference in electrical charges between the inside and outside of a resting nerve membrane.

  15. 2 points   

    QUESTION 33

  16. At resting potential, the ion distribution inside and outside of a neuron is such that ______ions are most abundant on the outside of the cell, while _____ ions are most abundant on the inside of the cell

    Calcium; phosphate

    Sodium; potassium

    Potassium; sodium

    Sulfate; potassium

Homework Answers

Answer #1

Q24. Spatial summation

Spatial summation is the effect of triggering an action potential a neurone from one or more presynaptic neurones.

Q25. IPSP

Q27. Greaded potential

Q28. Neurotransmitters enters postsynaptic cell through chemical gated channels.

Q29. Increased, sodium

Q30. voltage

Q31. Both b and c are true

Permeability to potassium increases and permeability to sodium decreases

Q32. The difference in electrical charges between the inside and outside of a resting nerve membrane

Q33. Sodium, potassium

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