Exam 11: Introduction to the Nervous System Nervous Tissue

Neurons are responsible for sending and receiving signals referred to as action potentials while neuroglial cells serve a variety of supportive functions.

A local hyperpolarization that changes a postsynaptic neuron's membrane from resting potential to ^-85 mV is:

Resting membrane potential is maintained by the Na⁺/K⁺ pump which brings:

A neuron that receives neurotransmitters from another neuron is called:

A postsynaptic neuron is bombarded by synaptic inputs from several hundred presynaptic neurons. However, this neuron does not appear to transmit an impulse. Propose an explanation of why this could occur.

What is more likely to promote an action potential?

Explain how leak channels and gated channels differ.

When is the generation of an action potential impossible, no matter the strength of the stimulus?

Upon entering your house, you noticed the smell of cake baking in the oven. What division of the peripheral nervous system is responsible?

During repolarization of a neuron:

The autonomic nervous system does NOT carry signals to:

Branches that may occur along an axon are called:

What type of ion channels is always open?

The conduction of an action potential is faster in unmyelinated axons than in myelinated axons.

What best describes a converging circuit?

Kelly takes an antihistamine for allergies. Explain why sleepiness is a side effect of this medicine.

Regeneration of neural tissue in the PNS is possible only if the neuron's cell body remains intact.

Does a local potential guarantee the creation of an action potential? Explain.

Calcium ion entry into the axon terminal is necessary for the release of neurotransmitter into the synaptic cleft.

Relate the speed of conduction of an action potential to myelination.