What is a ligand?
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A ligand is an ion/molecule that binds to a receptor.
3. Which of the following is incorrect regarding the properties of neurons:
a.
resting membrane potential (RMP) of -70 mV
c.
threshold potential (TP) of +30 mV
b.
can be turned on (depolarized)
d.
can be turned off (hyperpolarized)
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c.
threshold potential (TP) of +30 mV
What are the two divisions of the PNS?
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The cranial nerves and the spinal nerves.
What is the purpose of this material surrounding axons in humans?
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To insulate the neurons and increase action potential velocity.
How is information transferred from the presynaptic cell to the postsynaptic cell?
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Information is transferred in the form of neurotransmitters.
What does it mean that action potentials are fixed in magnitude?
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, The amplitude of an AP is fixed so the amplitude will stay the same
regardless of the stimulus strength (all-or-nothing response).
What is a depolarization and how can it be achieved?
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A depolarization is a decrease in membrane potential; the membrane
potential is becoming less negative or more positive. This can occur by a
cation entering the cell or an anion leaving the cell.
Can you provide an example of an excitatory cholinergic synapse and explain how it
works?
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An example of an excitatory cholinergic synapse is the neuromuscular
junction of skeletal muscle. Acetylcholine binds to nicotinic receptors on
muscle cells and opens these receptors, allowing Na+ to depolarize the
cell.
What type of channels, neurotransmitters, and ions are involved in EPSPs?
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, The channel involved in an EPSP is ligand-gated. A typical neurotransmitter
involved in an EPSP is glutamate, as it is the most abundant excitatory
neurotransmitter in the CNS. The ions involved in an EPSP are typically
cations, such a Na+.
1. Which of the following is incorrect regarding astrocytes:
a.
they have pedicels
c.
they are the largest and most abundant cells in the entire CNS
b.
they are involved in the production cerebrospinal fluid (CSF)
d.
they regulate the levels of ions/neurotransmitters in the ECF of the brain
Give this one a try later!
b.
they are involved in the production cerebrospinal fluid (CSF)
Where does an action potential (AP) first occur in a neuron?
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The initial segment of the axon.
What portion(s) of a neuron do other neurons form synapses with?
Give this one a try later!
A ligand is an ion/molecule that binds to a receptor.
3. Which of the following is incorrect regarding the properties of neurons:
a.
resting membrane potential (RMP) of -70 mV
c.
threshold potential (TP) of +30 mV
b.
can be turned on (depolarized)
d.
can be turned off (hyperpolarized)
,Give this one a try later!
c.
threshold potential (TP) of +30 mV
What are the two divisions of the PNS?
Give this one a try later!
The cranial nerves and the spinal nerves.
What is the purpose of this material surrounding axons in humans?
Give this one a try later!
To insulate the neurons and increase action potential velocity.
How is information transferred from the presynaptic cell to the postsynaptic cell?
Give this one a try later!
Information is transferred in the form of neurotransmitters.
What does it mean that action potentials are fixed in magnitude?
Give this one a try later!
, The amplitude of an AP is fixed so the amplitude will stay the same
regardless of the stimulus strength (all-or-nothing response).
What is a depolarization and how can it be achieved?
Give this one a try later!
A depolarization is a decrease in membrane potential; the membrane
potential is becoming less negative or more positive. This can occur by a
cation entering the cell or an anion leaving the cell.
Can you provide an example of an excitatory cholinergic synapse and explain how it
works?
Give this one a try later!
An example of an excitatory cholinergic synapse is the neuromuscular
junction of skeletal muscle. Acetylcholine binds to nicotinic receptors on
muscle cells and opens these receptors, allowing Na+ to depolarize the
cell.
What type of channels, neurotransmitters, and ions are involved in EPSPs?
Give this one a try later!
, The channel involved in an EPSP is ligand-gated. A typical neurotransmitter
involved in an EPSP is glutamate, as it is the most abundant excitatory
neurotransmitter in the CNS. The ions involved in an EPSP are typically
cations, such a Na+.
1. Which of the following is incorrect regarding astrocytes:
a.
they have pedicels
c.
they are the largest and most abundant cells in the entire CNS
b.
they are involved in the production cerebrospinal fluid (CSF)
d.
they regulate the levels of ions/neurotransmitters in the ECF of the brain
Give this one a try later!
b.
they are involved in the production cerebrospinal fluid (CSF)
Where does an action potential (AP) first occur in a neuron?
Give this one a try later!
The initial segment of the axon.
What portion(s) of a neuron do other neurons form synapses with?
