Exam 11: Introduction to the Nervous System Nervous Tissue

During depolarization, the membrane potential becomes more positive.

Explain how a polarized neuron differs from a hyperpolarized neuron.

Which of the following is most likely to produce an action potential?

Determine the direction in which an electrical signal is carried in a typical multipolar neuron.

Myelinated axons in the CNS are known as:

Bundles of axons known as tracts are part of the:

The autonomic nervous system carries signals to cardiac muscle, smooth muscle, and glands.

The nerve agent, sarin, was developed during World War II to block the effects of acetylcholinesterase. Explain the effects of this nerve agent on the synapse.

Summarize the differences between the somatic motor division and the autonomic nervous system.

Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed in the brain and spinal cord. With what process does this interfere and what would be the consequences?

Explain the purpose of a neuronal pool.

A series of measurements with a voltmeter show a neuron's membrane potential becoming more negative, from ^-70 mV to ^-85 mV. This neuron is experiencing a:

Which of the following is correct about threshold?

Determine the fiber type in which propagation of an action potential will occur most quickly.

Neuronal pools are collections of:

The two anatomical divisions of the nervous system are the:

Because of their ability to rapidly divide during brain injury, which type of neuroglial cell would be more likely to form a brain tumor?

What type of synapse must have receptors to transmit signals?

Which of the following best describes a bipolar neuron?

Acetylcholine (ACh) may excite postsynaptic neurons in the CNS; however, it may inhibit some postsynaptic neurons in the PNS. Explain how acetylcholine can be both excitatory and inhibitory.