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Bio 161 Exam 3 Psu Questions And Answers With Verified Solutions Already Passed!!!
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Bio 161 Exam 3 Psu Questions And Answers With Verified Solutions Already Passed!!!
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Bio 161 Exam 3 Psu Questions AndAnswers With Verified Solutions Already
Passed!!!
synapse - ANSWER✔✔ space between neurons where the conversation from an
electoral signal to a chemical signal occurs
Pre synaptic neuron - ANSWER✔✔ sends the message and gives off the signal
post synaptic - ANSWER✔✔ receives the message
neurotransmitter - ANSWER✔✔ chemical messenger released at the end of a
nerve cell
summation - ANSWER✔✔ sum of all local potential chances at the synapses of a
post synaptic cell
temporal summation - ANSWER✔✔ one presynaptic neurone releases
neurotransmitter
spatial summation - ANSWER✔✔ The sum of multiple synapses firing at different
locations at one time to create a net effect.
Excitatory post synaptic potential - ANSWER✔✔ (ESPS) causes depolarization of
a post synaptic neuron
inhibitory post synaptic potential - ANSWER✔✔ (ISPS) causes hyper polarization
of post synaptic neuron
how do neurotransmitters result in the movement of ions that excite or inhibit post
synaptic neurons - ANSWER✔✔ it diffuses across the synaptic cleft onto the
postsynaptic membrane causing chemical gated ion channels to open ???
what are the roles of ESPS and ISPS in neural circuits - ANSWER✔✔ ESPS -
depolarize the post synaptic neuron
ISPS - hyperpolarize the post synaptic neuron
, What are the steps of secretion - ANSWER✔✔ 1. action potential travels down
axon to terminal
2. depolarization of neuron open voltage gated calcium channels
3. calcium binds to protein machinery and causes vesicles to release
neurotransmitters into synapse
4. neurotransmitters bid to chemically gated ion channels to post synaptic neuron
cell membrane
5. binding of a neurotransmitters results in the movement of ions into or out of the
post synaptic cell
Somatic sensory - ANSWER✔✔ receives sensory information from skin, muscles
and joints
proprioceptors - ANSWER✔✔ monitor the position and movement of body;
neurons send signals to the brain about the stretch of muscles tendons and joints
visceral (autonomic) sensory - ANSWER✔✔ consists of afferent neurons that
deliver information to the brain from all of the organs that are associated in
involuntary motor action
somatic motor - ANSWER✔✔ "voluntary" nervous system: innervates skeletal
muscle
ventral horn ->"voluntary"
visceral motor - ANSWER✔✔ smooth muscle, cardiac muscle, glands
lateral horn
Receptors - ANSWER✔✔ In neurons, specialized protein molecules on the
postsynaptic membrane; neurotransmitters bind to these molecules after passing
across the synaptic cleft.
receptor cells - ANSWER✔✔ Specialized cells in every sensory system of the
body that can turn other kinds of energy into action potentials (neural impulses)
that the brain can process.
Acetylocholine (ACh) - ANSWER✔✔ A neurotransmitter that enables learning
and memory and also triggers muscle contraction
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