1 ) Neurons send signals throughout the body. When an impulse is within a neuron, it is electrical. When the signal moves, it is
A : electrical
B : chemical
c: ionic
d: signals don't move between neurons
2) what allows neurons to generate an action potential and keep it moving through the neuron?
a- presence of a synapse
b- production of neurotransmitter
c- location of the terminal
d- distribution of ions
3) What kind of neuron passes messages to muscles?
a- sensory neurons
b- motor neurons
c-synaptic neurons
d- interneurons
4) what causes an action potential to travel down an axon?
a- potassium ions rush into the axon, making it positive
b-sodium ions rush into axon, making it negative
c- sodium ions leave the axon , making it negative
d- sodium ions rush into the axon, making it positive
5) where in the nervous system would you find neurotransmitters?
a- in the synapses
b- in the neuron cell bodies
c- in the axon
d- in the dendrites
Please be an angel (: and help me on my homework ive been stuck on this for two days . :((((("
A : electrical
B : chemical
c: ionic
d: signals don't move between neurons
2) what allows neurons to generate an action potential and keep it moving through the neuron?
a- presence of a synapse
b- production of neurotransmitter
c- location of the terminal
d- distribution of ions
3) What kind of neuron passes messages to muscles?
a- sensory neurons
b- motor neurons
c-synaptic neurons
d- interneurons
4) what causes an action potential to travel down an axon?
a- potassium ions rush into the axon, making it positive
b-sodium ions rush into axon, making it negative
c- sodium ions leave the axon , making it negative
d- sodium ions rush into the axon, making it positive
5) where in the nervous system would you find neurotransmitters?
a- in the synapses
b- in the neuron cell bodies
c- in the axon
d- in the dendrites
Please be an angel (: and help me on my homework ive been stuck on this for two days . :((((("
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I can understand your confusion. These questions are rather strangely worded.
1. If what is meant by "When the signal moves, " is how is the signal transmitted from one cell to another at the synapse, then the answer is B.
2. I think the answer they are looking for is D, because production of neurotransmitter without its release and interaction with post-synaptic receptors wouldn't produce an action potential.
3. You can get this one yourself. It is easy. If you don't have a textbook, look up the definitions in Wikipedia.
4. D. Both K+ and Na+ are positively charged, so if either rush into the cell, they will make it more positive with respect to the extracellular environment. The extracellular matrix has lots of Na+. The cells balance the positive extracellular charge with K+. But when they are excited, the membrane channels open up and the sodium then flows in, making the cell more positive. Then the cell is too positive, so both start flowing out and then the cell balances its environment again exchanging the two via a Na+/K+ ATP pump.
5. They probably want you to say A. That is the best answer if one accepts the Synaptic Hypothesis of Neural Transmission. I do accept this hypothesis. However, both your instructor and you might be amazed at how many PhD and MD neurobiologists while espousing this on the one hand, actually completely ignore it when analyzing much of their own data and/or papers in the scientific literature.
1. If what is meant by "When the signal moves, " is how is the signal transmitted from one cell to another at the synapse, then the answer is B.
2. I think the answer they are looking for is D, because production of neurotransmitter without its release and interaction with post-synaptic receptors wouldn't produce an action potential.
3. You can get this one yourself. It is easy. If you don't have a textbook, look up the definitions in Wikipedia.
4. D. Both K+ and Na+ are positively charged, so if either rush into the cell, they will make it more positive with respect to the extracellular environment. The extracellular matrix has lots of Na+. The cells balance the positive extracellular charge with K+. But when they are excited, the membrane channels open up and the sodium then flows in, making the cell more positive. Then the cell is too positive, so both start flowing out and then the cell balances its environment again exchanging the two via a Na+/K+ ATP pump.
5. They probably want you to say A. That is the best answer if one accepts the Synaptic Hypothesis of Neural Transmission. I do accept this hypothesis. However, both your instructor and you might be amazed at how many PhD and MD neurobiologists while espousing this on the one hand, actually completely ignore it when analyzing much of their own data and/or papers in the scientific literature.
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1) this varies, but i think the answer they want is chemical
2) i would pick b
3) this one is obviously b
4) is d
5) all of these are true, but if i had to choose i would pick a
if you were willing to do research you'd have had the answers in the first hour
you must have been watching tv for two days, maybe stuck on one channel
2) i would pick b
3) this one is obviously b
4) is d
5) all of these are true, but if i had to choose i would pick a
if you were willing to do research you'd have had the answers in the first hour
you must have been watching tv for two days, maybe stuck on one channel