Exam 4: Extension: A - the Structure and Electrical Activity of Neurons

The process by which molecules move from areas of high concentration to areas of low concentration is called:

Depolarization is usually due to the movement of _____.

Neurotransmitters are chemicals responsible for:

Multiple sclerosis is a neurodegenerative disorder in which:

Multiple sclerosis results from the deterioration of _____.

Electrical excitability in neurons is maintained by a molecular pump which exchanges _____ across the plasma membrane.

The closer a synapse is to the _____, the more influential it is going to be in determining the production of action potentials in that neuron.

A brief but large reversal in the membrane potential is characteristic of:

The information - processing units of the nervous system are:

The main ion responsible for initiating the action potential at the axon hillock is _____.

The main ion responsible for the restoration of the resting potential is _____.

A long, myelinated axon lacking nodes of Ranvier would probably:

The chemical energy used to power a neuron's activities is synthesized by the:

A change in the membrane potential from -65 mV to -70 mV is an example of:

The basic structure of the cell membrane of a neuron consists of a double layer of phospholipid molecules in which are embedded _____.

Tetrodotoxin most specifically interferes with which component of neural transmission?

The movement of the action potential from axon hillock to axon terminal is known as:

Under resting conditions, the opening of Na⁺ channels results in a(n) _____ of Na⁺ ions.

It is currently held that humans have about _____ active genes.

The Na⁺ channel - blocking poison found in puffer fish is: