Physio psych CH 3 Question and answer
verified to pass 2025
False - correct answer An atom that loses an electron becomes a negatively
charged ion
The resting potential of a neuron - correct answer Has a negative charge on
the inside compared to the outside of the neuron
True - correct answer A higher concentration of K+ inside the neuron
False - correct answer A higher concentration of CI- inside the neuron
True - correct answer The higher concentration of NA+ outside the neuron
Negatively charged proteins (A-) - correct answer The inside of the neuron
gets most of it's negative charge from
There are pressures for Na+ Ions to enter a neuron. Which of the following
contribute to this pressures? Select all that apply - correct answer Na+ ions
are repelled from other Na+ ions on the outside of the neuron
Na+ is attracted to the negative charge on the inside of the neuron
There is a higher concentration of Na+ on the outside, and atoms move from
high to low concentration
, Voltage gated, threshold - correct answer Ion channels that are _______
Open when the membrane around them reaches a specific _________
potential
Axon Initial Segment (AIS) - correct answer An action potential begins the
True - correct answer The opening of Na+ channels causes the neuron
membrane to depolarize
Put the following events in the order that they occur in an action potential -
correct answer 1. Voltage gated Na+ meet their threshold and open rapidly,
causing depolarization
2. K+ ions open slowly, causing K+ ions to exit the neuron
3. Na+ close, becoming less permeable to Na+ entering the neuron
4. K+ ions Remain open, causing a re-polarization of the membrane
5. The membrane hyperpolarizes
Na+, K+ - correct answer In an action potential, ____ causes depolarization
while _____ causes repolarization of the neuron membrane
True - correct answer During the relative refractory period, another action
potential can be created if there is a strong enough stimulation and
depolarization
verified to pass 2025
False - correct answer An atom that loses an electron becomes a negatively
charged ion
The resting potential of a neuron - correct answer Has a negative charge on
the inside compared to the outside of the neuron
True - correct answer A higher concentration of K+ inside the neuron
False - correct answer A higher concentration of CI- inside the neuron
True - correct answer The higher concentration of NA+ outside the neuron
Negatively charged proteins (A-) - correct answer The inside of the neuron
gets most of it's negative charge from
There are pressures for Na+ Ions to enter a neuron. Which of the following
contribute to this pressures? Select all that apply - correct answer Na+ ions
are repelled from other Na+ ions on the outside of the neuron
Na+ is attracted to the negative charge on the inside of the neuron
There is a higher concentration of Na+ on the outside, and atoms move from
high to low concentration
, Voltage gated, threshold - correct answer Ion channels that are _______
Open when the membrane around them reaches a specific _________
potential
Axon Initial Segment (AIS) - correct answer An action potential begins the
True - correct answer The opening of Na+ channels causes the neuron
membrane to depolarize
Put the following events in the order that they occur in an action potential -
correct answer 1. Voltage gated Na+ meet their threshold and open rapidly,
causing depolarization
2. K+ ions open slowly, causing K+ ions to exit the neuron
3. Na+ close, becoming less permeable to Na+ entering the neuron
4. K+ ions Remain open, causing a re-polarization of the membrane
5. The membrane hyperpolarizes
Na+, K+ - correct answer In an action potential, ____ causes depolarization
while _____ causes repolarization of the neuron membrane
True - correct answer During the relative refractory period, another action
potential can be created if there is a strong enough stimulation and
depolarization
