Exam 7: The Nervous System: Neurons and Synapses

What is NOT true of the relative refractory period?

What type of proteins are present in gap junctions that form water-filled channels between neurons?

What type of autonomic fibers release ACh at effectors?

Excitotoxicity is caused by

As the intensity of a stimulus increases,more axons will become activated.This process is called

Serotonin is derived from the amino acid tryptophan and is an important neurotransmitter.

Atropine is an antagonist to nicotine.

Sensory neurons for muscle position are the fastest conducting neurons.

In a myelinated axon,Na⁺ channels are

Synaptic plasticity involves structural changes in neurons such as

____________ is an acetylcholinesterase antagonist used to treat myasthenia gravis.

The minimum depolarization needed to open Na⁺ gates is called the

Endogenous opioids transmit impulses of pain.

All axons in the PNS are surrounded by Schwann cells.

An axon will depolarize only if the membrane potential reaches between -70mV and -55mV.This follows the

Conduction of an action potential in a myelinated axon is called

Which cells are needed for the formation of synapses in the CNS?

Mutation of the N-methyl-D-aspartate ((NMDA)receptor would affect the ability of ____________ to regulate neural function.

Which ion's movements is responsible for repolarization?

Action potentials frequency encodes stimulus intensity.