- #1
sameeralord
- 662
- 3
Hello everyone,
These are true,false questions. I'm on holiday so can't get help yet and this is not homework.
1.Increased permeability of the cell membraneto K+ than Na+ is important for maintaining resting membrane potential of cell?
Ok I know this is true but I don't understand this. In a normal cell I know this is how it is, but if there was a cell that was more permeable for Na+ why won't it be able to maintain a resting membrane potential of a different value.
2. Orthodontic conduction of a nerve impulse dies out at first synapse?
I know orthodonic conduction is going from stroma to axon, but I don't understand the question.
Myelinated nerves only carry out othrodromic conduction?
I don't understand why?
3. Latent period obeserved in a simple muscle twitch obtained from a nerve muscle preparation.
*Is mostly due to delay at the neuromuscular junction
I know latent period is the time taken for stimulation to migrate to the recording electrode. So false I think.
*Becomes shorter when the strength of stimulus is increased
Due to all or none principle, which has no emphasis on strength of stimulus. I think this has no effect. So false I think.
*Is shorter if adrenalin is added to the solution
I don't know this. Does neurotransmitter decrease latent period
*Can be varied by altering the point of stimulation along the length of the nerve.
This is true I think. This decreases the distance between stimulating and recording electrodes.
*Increased with repeated and prolonged stimulation of nerve.
This is false due to habituation I think.
4. Nerve condcution velocity
* Is reduced when nerve is compressed
* Is reduced in fibres supplying fatigued muscles.
I don't know the answers for these. First one obviously looks true, but what is the reasoning. Second one I think is false.
Thanks a lot in advance
These are true,false questions. I'm on holiday so can't get help yet and this is not homework.
1.Increased permeability of the cell membraneto K+ than Na+ is important for maintaining resting membrane potential of cell?
Ok I know this is true but I don't understand this. In a normal cell I know this is how it is, but if there was a cell that was more permeable for Na+ why won't it be able to maintain a resting membrane potential of a different value.
2. Orthodontic conduction of a nerve impulse dies out at first synapse?
I know orthodonic conduction is going from stroma to axon, but I don't understand the question.
Myelinated nerves only carry out othrodromic conduction?
I don't understand why?
3. Latent period obeserved in a simple muscle twitch obtained from a nerve muscle preparation.
*Is mostly due to delay at the neuromuscular junction
I know latent period is the time taken for stimulation to migrate to the recording electrode. So false I think.
*Becomes shorter when the strength of stimulus is increased
Due to all or none principle, which has no emphasis on strength of stimulus. I think this has no effect. So false I think.
*Is shorter if adrenalin is added to the solution
I don't know this. Does neurotransmitter decrease latent period
*Can be varied by altering the point of stimulation along the length of the nerve.
This is true I think. This decreases the distance between stimulating and recording electrodes.
*Increased with repeated and prolonged stimulation of nerve.
This is false due to habituation I think.
4. Nerve condcution velocity
* Is reduced when nerve is compressed
* Is reduced in fibres supplying fatigued muscles.
I don't know the answers for these. First one obviously looks true, but what is the reasoning. Second one I think is false.
Thanks a lot in advance
Last edited: