Exam 7: The Nervous System: Neurons and Synapses

The most common neurotransmitter in the brain is

What type of autonomic fibers release ACh at effectors?

What type of neural pathway involves one neuron forming synapses with several postsynaptic neurons?

What is present at the axon hillock that allows the production of action potentials?

The nigrostriatal dopamine system is located in part of the midbrain known as the substantia nigra and is degenerated in the disease myasthenia gravis.

What causes presynaptic inhibition?

If the binding of muscarine to its receptor in the heart causes the beta-gamma complex of the G-protein to bind to a K+ channel,

What is NOT true of the relative refractory period?

A lack of extracellular Ca²⁺ would cause increased release of neurotransmitters.

The capacity of synapses for alteration at the molecular level is termed as

Retrograde axonal transport may be responsible for movement of herpes virus,rabies virus,and tetanus toxin from nerve terminals to the cell body.

Neurotransmitter release would be inhibited by

What do muscarine and nicotine have in common?

The nerve is the basic structural and functional unit of the nervous system.

The mechanism that allows many Na⁺ ions to move into the axon is

What process is needed to return a membrane to its resting membrane potential with all ions in the correct locations?

MAO inhibitors may cause hypertensive crisis by a person eating foods rich in

Endogenous cannabinoids have effects similar to the active ingredient in

What is NOT true of conduction through dendrites and cell bodies of neurons?

Endocannabinoids are retrograde neurotransmitters,meaning they are