A&P CHAPTER 12 – Flashcards

The term "nerve fiber" refers to a(n) __________.

Most metabolic and regulatory functions in a neuron happen where?

Which glial cell is found wrapped around nerve fibers in the PNS?

In which part of a neuron is the postsynaptic membrane usually found?

Which cells form myelin in the spinal cord?

A myelin sheath is composed primarily of __________.

In a neuron, the opening of sodium gates typically leads to __________.

An inhibitory local potential causes which of the following?

While a neuron membrane is depolarizing its __________

A neuron receives a stimulus. Which of the following events happens next?

In an action potential, which event directly follows repolarization?

What occurs during hyperpolarization of a neuron membrane?

During the absolute refractory period which of the following is true?

What is the most common inhibitory neurotransmitter in the brain?

Which of these happens first in an cholinergic synaptic transmission? Acetylcholine diffuses across the synaptic cleft A postsynaptic potential is produced Sodium enters the postsynaptic cell The synaptic vesicles release acetylcholine Acetylcholine binds to ligand-regulated gates

Which of these happens first in an adrenergic synaptic transmission? ATP is converted to cyclic AMP Adenylate cyclase is activated G protein dissociates from the NE receptor G protein binds to adenylate cyclase Cyclic AMP induces several effects in the cell

Which neurotransmitter excites skeletal muscle and inhibits cardiac muscle?

Inhibitory postsynaptic potentials (IPSPs) are associated with which of the following?

The opening of __________ gates produces an __________.

What property of neurons allows them to respond to changes in the environment?

The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing. This is an example of what type of neural circuit?