Module 03: Nervous System Organization and Signaling: Neurotransmitters - Synapses - Integration

What is the name of receptors that epinephrine and norepinephrine can bind to?

Adrenergic

Which of the following statements is false?

IPSPs usually depolarize the membrane.

Which acetycholine receptor type functions as a fast-gated ion channel?

Nicotinic cholinergic receptors

___________ occurs when two or more presynaptic neurons stimulate a postsynaptic neuron simultaneously to produce multiple graded potentials within a close period of time.

Spatial summation

______________ occurs when a presynaptic neuron frequently stimulates a postsynaptic neuron to produce multiple graded potentials within a close period of time.

Temporal summation

The activation of which channels initiates the release of presynaptic neurotransmitter?

Voltage-gated calcium channels

A synapse at a cell body is referred to as an __________ synapse.

axosomatic

In the nervous system, what is it called when one presynaptic neuron has several collaterals, which communicates to several other neurons?

divergence

The neurocrine that acts as the main inhibitory neurotransmitter in the brain is ________.

gamma-aminobutyric acid

The chemical messengers released into synapses are called _____________.

neurotransmitters

The term used to describe the space between a pre- and post-synaptic neuron is _____________.

synaptic cleft

The total amount of neurotransmitter released at the axon terminal is directly related to the _______________.

total number of action potentials

Which of the following does not influence the rate of nerve action potential conduction by a particular neuron?

whether an axon is sensory or motor