Exam 11: The Nervous System: Integration and Control

The region of brain that coordinates antagonistic muscle movements is the

The left and right sides of the cerebrum are interconnected by which one of the following?

Given a particular neuron, an action potential either occurs or does not occur, depending on the strength of the stimulus; therefore, the action potential is described as ________.

During synaptic transmission, the influx of ________ causes vesicles in the axon bulb to fuse with the cell membrane, releasing ________.

Only 20% of cells in the human nervous system are neurons, and the rest are cells that support and protect neurons called ________ cells.

During a brain surgery, a surgeon passes an instrument through the dura mater. Which one of the following does the surgeon pass through next?

The figure above shows a sagittal section through the brain. Match each labeled part (A through F) of the brain with its function. -controls heart rate and blood pressure, as well as sneezing and swallowing reflexes; motor nerves from one side of the forebrain cross to the opposite side of the body

Which one of the following types of neurotransmitter functions as an inhibitory agent, typically suppressing the sensation of pain?

The repolarization phase of an action potential is dependent on the sodium-potassium pump.

Match each of the following disorders associated with the nervous system with its description. -autoimmune disorder that results in damage to the myelin sheaths of CNS neurons; transmission of impulses is subsequently disrupted

Control of smooth muscle and internal organs is the role of the ________ division of the nervous system.

People who are intoxicated cannot coordinate their movements or walk a straight line because alcohol disrupts the normal function of which region of the brain?

Match the following types of neurons with their descriptions. -transmit impulses within the central nervous system

Transient local changes in the resting potential of a cell are called graded potentials because they can vary in size. In a phenomenon known as ________, many incoming signals produce progressively larger graded potentials in a cell - larger than any single impulse would produce alone.

Drugs that cause changes in emotions, consciousness, or behavior are known as ________.

The figure above shows a sagittal section through the brain. Match each labeled part (A through F) of the brain with its function. -regulates body temperature and stimulates hunger drive

All of the following statements about psychoactive drugs are TRUE EXCEPT which one?

Convergence occurs when several presynaptic cells

Bacterial and viral infections of the brain are rare because the ________ prevents most viruses, proteins, and bacteria from entering the cerebrospinal fluid.

Use the figure above to match the events of action potential propagation with when they occur on the graph (labeled A through D). -the membrane is depolarized