Chapter 11 Nervous System (2)

If a nerve impulse is traveling from the central nervous system to the organ of the body, the impulse would be traveling on a:

C: Motor neuron

Which of the following occurs during the absolute refractory period?

C: The neuron cannot generate an action potential.

Insufficient production of acetylcholine in the synapses of the brain, abnormal tangled neurons, and large deposits of beta amyloid are problems associated with:

D: Alzheimer's Disease

Oligodendrocytes are similar to Schwann cells in that they:

D: Are a type of neuroglial cell.

Which of the following events associated with the transmission of an impulse across the synapse occurs last?

D: Chemically gated channels for sodium open in the postsynaptic membrane.

Which of the following is not true regarding the sodium-potassium pump?

D: Due to actions of the sodium-potassium pump, the charge of the cytoplasm of a neuron is slightly more positive than the charge of the interstitial fluid surrounding it.

Amyotrophic lateral sclerosis (ALS is a disease that results from the nerve damage) in the:

D: Spinal cord

During which of the following phases of an action potential do the sodium channels close and potassium channels open, relaxing potassium from the neuron?

E: Repolarization

Which of the following is a true statement regarding the synapse?

E: The synaptic cleft is a fluid-filled gap between the presynaptic neuron and the postsynaptic neuron.

The nucleus and most of the organelles of a neuron are located in the dendrites.

FALSE

A student noticed that every time he smelled a certain perfume in the hallway, it reminded him of his mother. This is due largely to the activity of the limbic system.

TRUE

The absolute refractory period characteristic of neurons is important in ensuring that action potentials travel in only one direction (KNOW FOR FINAL EXAM)

TRUE

The two subdivisions of the nervous system are the central nervous system and the peripheral nervous system.

TRUE

Which of the following processes is depicted in the above diagram?

C: Synaptic transmission