Exam 39: The Nervous System

Alice's PET (positron emission tomography) scan shows a large red area in the occipital lobe when taken while Alice is looking at color images. Which of the following is TRUE about Alice's PET scan?

The brain is able to take sensory inputs from many neurons, integrate them, and determine an appropriate response.

The peripheral nervous system consists of the brain and spinal cord.

Which of the following is part of the peripheral nervous system?

A person who is unable to speak after a stroke has had damage to what part of the brain?

The integration of excitatory postsynaptic potentials (EPSPs) and inhibitory postsynaptic potentials (IPSPs) received by a postsynaptic neuron determines its activity.

-A person you know has been in an automobile accident. The accident caused a dramatic personality change. Before the accident, he was industrious and well liked; after the accident, he is profane, impetuous, and incapable of working toward a goal. Which portion of the brain was most likely damaged?

The intensity of a stimulus is indicated by the of action potentials.

The is a cluster of neurons that plays a role in wake- sleep cycles, muscle tone, emotions, and some reflexes.

You arrive ten minutes late for your final exam and immediately regret stopping for donuts, which feel like a dead weight in your stomach. Your heart is pounding and your palms are sweaty. What part of your nervous system is in control?

Individuals diagnosed with Huntington's disease exhibit abnormal involuntary movements due to deterioration of the _ .

The interior of an unstimulated neuron maintains a constant negative charge, called the .

Individuals with viral hemorrhagic fever lose the ability to regulate their K+ levels. Why does this condition create neurological problems?

Most brain and spinal cord cells are

The junction across which electrical signals are passed from a neuron to a muscle fiber, a gland, or another neuron is called the

How are the sympathetic and parasympathetic nervous systems similar?

While walking barefoot along the beach, you step on a shard of glass and reflexively lift your injured foot. Which path did the reflex to lift your foot take?

The more frequently an action potential is triggered by a stimulus, the greater the intensity of the sensation.

During the repolarization phase of an action potential, the membrane potential falls from +60 to - 70 mV. This drop is due mostly to the movement of _ ions.

The right cerebral hemisphere