1. The adrenal medulla is excited by the parasympathetic preganglionic neuron during times of immediate stress....
1. The adrenal medulla is excited by the parasympathetic preganglionic neuron during times of immediate stress. (true or false)
2. The activation gate of the voltage-gated sodium channel closes after a certain amount of time regardless of the membrane potential. (true or false)
3. Acetylcholine binds to voltage-gated sodium ion channels to initiate a graded potential. (true or false)
4. Action potentials can occur in the axon terminal. (true or false)
5. Opening a chloride ion channel in the cell body of a neuron will depolarize the neuron. (true or false)
Homework Answers
1. False- During the flight/ ffight response, adrenal medulla is excited by the sympathetic post ganglionic neurons.
2. False, activation gate of the voltage-gated sodium channel closes depending upon the voltage.
3. True. Acetylcholine binds to voltage-gated sodium ion channels to initiate a graded potential.
4.False Action potentials are intiated at the start of the axon.
5. False. Opening a chloride ion channel in the cell body of a neuron will hyperpolarize the neuron.
Add Answer to:
1. The adrenal medulla is excited by the parasympathetic
preganglionic neuron during times of immediate stress....
1. What channels or carriers are NOT found at the axon to the axon terminal? Select...
1. What channels or carriers are NOT found at the axon to the axon terminal? Select one: a. Na+ leaky channels b. Cl- gated channels c. Na+ gated channels d. Na+-K+ ATPase e. None of the above 2. What is TRUE about action potential in the neuron? There may be more than one answer. Select one or more: a. At resting membrane potential (-70mV), the inactivation gate of the Na+ channel is closed while the activation gate is opened. b....
in no less than 3-5 full ser and falling) of a neuron Include the charges of...
in no less than 3-5 full ser and falling) of a neuron Include the charges of the area inside and outside the membrane how the tec desbe the action potential Clhoth rsinag sodium and potassium ion channels contribue action to the charges 15 pts moves downthe tporting event to describe how the action 16. Describe how the signal saltatory conductioins s ranmitted down the length of an axon through signal is transmitted down the length of an axon through tra...
During the propagation of an action potential, what would be the effect of a mutation in...
During the propagation of an action potential, what would be the effect of a mutation in the voltage-gated Na+-channels that does not allow “inactivation” phase to occur, such that these channels go directly from open to closed conformations? a) The neuron with the mutant Na+ channels will start letting in calcium ions and generate a calcium-based action potential that is stronger than the sodium-based action potential. b) The neuron with the mutant Na+ channel will exhibit a reverse electrochemical gradient...
for each, what is the right answer? 30. When a neuron encodes the strength of a...
for
each, what is the right answer?
30. When a neuron encodes the strength of a stimulus, it does so by changing A) the frequency of action potentials. B) the duration of each action potential C) the polarity of every alternate action potential. D) the size of each action potential E) the direction of the action potentials along the axon. 31. The relative refractory period of an axon begins with A) activation of chemically-gated K+ channels. B) increasing Na+ flux...
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase...
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase of the action potential (AHP) because Ligand-galed Nat channels are inactivated and cannot be opened Voltage-gated K channels become inactivated The K equilibrium potential is below the resting membrane potential All ofthe above. None of the above QUESTION 9 When an action potential reaches the axon terminal, release of neurotransmitter is triggered by... a. movement of sodium ions into the axon terminal b. movement...
D SCAN MATCHING 1. Depolarization 2. Action potential 3. Threshold 4. Repolarization 5. Relative refractory period...
D SCAN MATCHING 1. Depolarization 2. Action potential 3. Threshold 4. Repolarization 5. Relative refractory period 6. Absolute refractory period 7. Resting membrane potential 8. Continuous conduction 9. Saltatory conduction Choices A. a cell whose internal environment has an electrical charge equal to its external environment B. the process of a cell becoming positively charged C. the process of a cell becoming negatively charged D. an electrochemical change in the potential across a membrane that causes an electrical signal to...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing the status (active or nonactive) of the voltage-gated sodium channel, voltage-gated potassium channel, sodium/potassium pump, and overall voltage and/ or voltage range (in millivolts, or mV) for each of the following. A) Resting membrane (prior to the initiation of an action potential) B) just before threshold to just after threshold (Depolarization) C) Rising phase of the action potential D) Falling phase of the action...
KEY TERMS March the numbered form with the definition that is it be definition the responding...
KEY TERMS March the numbered form with the definition that is it be definition the responding sumber in front of the appropriate 40. excitatory postsynaptic potential 21. resting potential 22 on leakage channels 23. equilibrium potential -24 graded potential 25. gated ion channels 26. depolarization 27. hyperpolarization Sensory neurons 2. central nervous system 3. motor neurons 4. intercurons 5. peripheral nervous system 6. somatic motor neurons *7. autonomic motor neurons 8. sympathetic 9. parasympathetic 10. cell body all dendrites 12....
Efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central F...
efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
change pas channels in the volta t ive protein to change shape. This A of the...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
in no less than 3-5 full ser and falling) of a neuron Include the charges of the area inside and outside the membrane how the tec desbe the action potential Clhoth rsinag sodium and potassium ion channels contribue action to the charges 15 pts moves downthe tporting event to describe how the action 16. Describe how the signal saltatory conductioins s ranmitted down the length of an axon through signal is transmitted down the length of an axon through tra...
for
each, what is the right answer?
30. When a neuron encodes the strength of a stimulus, it does so by changing A) the frequency of action potentials. B) the duration of each action potential C) the polarity of every alternate action potential. D) the size of each action potential E) the direction of the action potentials along the axon. 31. The relative refractory period of an axon begins with A) activation of chemically-gated K+ channels. B) increasing Na+ flux...
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase of the action potential (AHP) because Ligand-galed Nat channels are inactivated and cannot be opened Voltage-gated K channels become inactivated The K equilibrium potential is below the resting membrane potential All ofthe above. None of the above QUESTION 9 When an action potential reaches the axon terminal, release of neurotransmitter is triggered by... a. movement of sodium ions into the axon terminal b. movement...
D SCAN MATCHING 1. Depolarization 2. Action potential 3. Threshold 4. Repolarization 5. Relative refractory period 6. Absolute refractory period 7. Resting membrane potential 8. Continuous conduction 9. Saltatory conduction Choices A. a cell whose internal environment has an electrical charge equal to its external environment B. the process of a cell becoming positively charged C. the process of a cell becoming negatively charged D. an electrochemical change in the potential across a membrane that causes an electrical signal to...
KEY TERMS March the numbered form with the definition that is it be definition the responding sumber in front of the appropriate 40. excitatory postsynaptic potential 21. resting potential 22 on leakage channels 23. equilibrium potential -24 graded potential 25. gated ion channels 26. depolarization 27. hyperpolarization Sensory neurons 2. central nervous system 3. motor neurons 4. intercurons 5. peripheral nervous system 6. somatic motor neurons *7. autonomic motor neurons 8. sympathetic 9. parasympathetic 10. cell body all dendrites 12....
efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
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