Human Physiology

The Nervous SystemNeurons and Synapses

Chapter 4

Neurons and Supporting Cells

Match the type of neuroglia to its main function.

Answer Cell type Function

1. __ 1. Ependymal cells

A. Produce cerebrospinal

fluid.

2. __ 2. Microglia B. Remove debris.

3. __ 3. Oligodendrocytes

C. Blood brain barrier.

4. __ 4. Astrocytes D. Provide myelin coat

around the axons in the

CNS

Match the neuroglia to their functions:

ANSWER

Neurons and Supporting Cells

Match the type of neuroglia to its main function.

Answer Cell type Function

1. A 1. Ependymal cells

A. Produce cerebrospinal

fluid.

2. B 2. Microglia B. Remove debris.

3. D 3. Oligodendrocytes

C. Blood brain barrier.

4. C 4. Astrocytes D. Provide myelin coat

around the axons in the

CNS

Match the neuroglia to their functions:

Neurons and Supporting Cells

Which of the following is the most likely consequence of demyelinating diseases like multiple sclerosis?

A. stronger action potentials.B. faster conduction velocity.C. slower conduction velocity.D. weaker action potentials.

ANSWER

Neurons and Supporting Cells

Which of the following is the most likely consequence of demyelinating diseases like multiple sclerosis?

A. stronger action potentials.B. faster conduction velocity.C. slower conduction velocity.D. weaker action potentials.

Action Potential

An action potentialA. begins with Na+ moving into the cell.B. begins with Na+ leaving the cell.C. makes cell membrane potential briefly positive.D. makes cell membrane more negative.E. B & DF. A & C

ANSWER

Action Potential

An action potentialA. begins with Na+ moving into the cell.B. begins with Na+ leaving the cell.C. makes cell membrane potential briefly positive.D. makes cell membrane more negative.E. B & DF. A & C

Action Potential

During the downward part of the action potential (D), the membrane becomes most permeable to ________ ion.A. potassium.B. calcium.C. chloride.D. sodium.

ANSWER

Action Potential

During the downward part of the action potential (D), the membrane becomes most permeable to ________ ion.A. potassium.B. calcium.C. chloride.D. sodium.

Rearrange the following:A. Closing of voltage-gated Na+ channels B. RepolarizationC. Opening of voltage-gated Na+ channelsD. Depolarization to thresholdE. StimulusF. Rapid depolarizationG. Opening of voltage-gated K+ channelsCorrect order __→ __→ __→ __→ __→ __→ __.

ANSWER

Action Potential

Rearrange the following:A. Closing of voltage-gated Na+ channels B. RepolarizationC. Opening of voltage-gated Na+ channelsD. Depolarization to thresholdE. StimulusF. Rapid depolarizationG. Opening of voltage-gated K+ channelsCorrect order E→D→ C→ F→ A→ G→B.

Action Potential

The Synapse

Which one of these follows all-or-none principle? A. Inhibitory postsynaptic potential.B. Graded potential.C. Action potential.D. Excitatory postsynaptic potential.

ANSWER

The Synapse

Which one of these follows all-or-none principle? A. Inhibitory postsynaptic potential.B. Graded potential.C. Action potential.D. Excitatory postsynaptic potential.

The Synapse

Rearrange the following steps at a synapse in the correct order:A. Neurotransmitter diffuses across the cleft.B. Release of neurotransmitter.C. Ion channel opens on postsynaptic cell.D. Neurotransmitter binds to the postsynaptic receptor.Correct order is ?→ ?→ ?→ ?.

The Synapse

Rearrange the following steps at a synapse in the correct order:A. Neurotransmitter diffuses across the cleft.B. Release of neurotransmitter.C. Ion channel opens on postsynaptic cell.D. Neurotransmitter binds to the postsynaptic receptor.Correct order is B→ A→ D→ C.

The Synapse

BACK TO GAME

Electrical and chemical synapses differ in thatA. electrical synapses have a refractory period.B. chemical synapses can have graded and summation response.  C. chemical synapses rely on neurotransmitters for signaling.D. electrical synapses have an all or none response.E. All the above are correct

The Synapse

Electrical and chemical synapses differ in thatA. electrical synapses have a refractory period.B. chemical synapses can have graded and summation response.  C. chemical synapses rely on neurotransmitters for signaling.D. electrical synapses have an all or none response.E. All the above are correct

Neurotransmitters

An example of a gas as a neurotransmitter is ___________.

ANSWER

Neurotransmitters

An example of a gas as a neurotransmitter is nitric oxide.

Neurotransmitters

Which of the following is likely to open post-synaptic chloride channels?A. Gamma amino butyric acid.B. Glutamate.  C. Acetylcholine. D. Aspartate. ANSWER

Neurotransmitters

Which of the following is likely to open post-synaptic chloride channels?A. Gamma amino butyric acid.B. Glutamate.  C. Acetylcholine. D. Aspartate.

Neurotransmitters

This enzyme is primarily responsible for intracellular degradation of dopamine and epinephrine.A. Monoamine oxidase.  B. Catechol O-methyl transferase.C. Acetylcholinesterase. D. Tyrosine Beta Hydroxylase.

ANSWER

Neurotransmitters

This enzyme is primarily responsible for intracellular degradation of dopamine and epinephrine.A. Monoamine oxidase.  B. Catechol O-methyl transferase.C. Acetylcholinesterase. D. Tyrosine Beta Hydroxylase.

Neurotransmitters

Which of the following is most likely to be removed from the synapse by enzymatic degradation?A. Norepinephrine.B. Serotonin.C. Acetylcholine. D. Dopamine. ANSWER

Neurotransmitters

Which of the following is most likely to be removed from the synapse by enzymatic degradation?A. Norepinephrine.B. Serotonin.C. Acetylcholine. D. Dopamine.

Neurotransmitters

Which of the following statements regarding neurotransmitters is true?A. Acetylcholine binds to adrenergic receptors. B. Opiate drugs, such as morphine, are antagonists of endorphins. C. Catecholamines are the most abundant neurotransmitters in the central nervous system.D. Gamma-amino butyric acid (GABA) is a major excitatory transmitter in the central nervous system.E. Acetylcholine is broken down by enzymes present on postsynaptic cell membranes.

ANSWER

Neurotransmitters

Which of the following statements regarding neurotransmitters is true?A. Acetylcholine binds to adrenergic receptors. B. Opiate drugs, such as morphine, are antagonists of endorphins. C. Catecholamines are the most abundant neurotransmitters in the central nervous system.D. Gamma-amino butyric acid (GABA) is a major excitatory transmitter in the central nervous system.E. Acetylcholine is broken down by enzymes present on postsynaptic cell membranes.