Question

Which of the following is true? a)When the neuron is in the resting state there is...

Which of the following is true?

a)When the neuron is in the resting state there is no potential across the membrane.

b)The concentration of Na+ is higher inside the nerve cell than outside the cell in the resting state.

c)Na+ and K+ ions move into and out of the nerve cell by diffusion across the membrane.

d)Negatively charged proteins move from outside the nerve cell to the inside to help establish a negative potential gradient in the resting neuron.

e)Curare results in overstimulation of the sympathetic nervous system.

f)Scopolamine produces tachycardia.

g)Saltatory conduction increases the rate at which nerve impulses are transmitted.

h)Every neurotransmitter released into the synaptic gap must find its way to a receptor site on the neighboring neuron for proper nerve transmission.

i)Malathion must be bioactivated before it is an effective neurotoxin.

j)Dermal exposure to organophosphate pesticides is a significant exposure route.

k)Atropine would be an effective antidote to poisoning by DDT.

Homework Answers

Answer #1

(a) The resting potential of cells in neuron is -70 milivolt. This means the cells of neuron has potential 70 mvolt less than outside cells. Due to the potential difference, there is a potential across the membrane.

The statement is false.

(b) In resting neutrons, there is concentration gradient of Na+ across the membrane. Here the concentratio of Na+ ion is more inside the cell than the outside cell. So Na+ is pumped out from cell.

So, the above statement is true.

(c) In resting neutrons, there is concentration gradient of Na+ across the membrane. Here the concentratio of Na+ ion is more inside the cell than the outside cell. So Na+ is pumped out from cell by diffusion. And to balance, Na-K pump worksd which allows K+ to enter inside cell by diffusion.

The above statement is true.

(d) The above statement is true.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. At resting membrane potential in a neuron, which is true of the forces responsible for...
1. At resting membrane potential in a neuron, which is true of the forces responsible for the movement of potassium (directed into or out of the cell)? Select one: a. The chemical gradient is outward while the electrical gradient is inward b. Chemical gradient is inward while the electrical gradient is outward c. Chemical and electrical gradients are directed outward d. Chemical and electrical gradients are directed inward 2. Multiple sclerosis is a devastating disease because it... Select one: a....
Which of the following is FALSE about the resting membrane potential? A) All cells have a...
Which of the following is FALSE about the resting membrane potential? A) All cells have a RMP. B) K+ concentration is higher inside the cell than outside the cell. C) Fixed cations produce a more positive charge inside. D) The sodium-potassium (Na+/K+) pump helps to create the charge difference.
Please No Explanation just ANSWER A,b,c,etc! QUESTION 24 Fifty neurons release excitatory neurotransmitters onto the dendrites...
Please No Explanation just ANSWER A,b,c,etc! QUESTION 24 Fifty neurons release excitatory neurotransmitters onto the dendrites and body of neuron “A.” Neuron A reaches threshold and fires an action potential. This is an example of saltatory summation. continuous summation. spatial summation. temporal summation. Which of the following terms does not belong with the others? sodium IPSP excitatory depolarize 2 points    QUESTION 27 Which one of the following terms does not belong with the others? graded potential depolarizing phase action...
8. Consider a neuron whose resting potential is -60 mV, and the EK = -100 mV...
8. Consider a neuron whose resting potential is -60 mV, and the EK = -100 mV and the ENa = +40 mV. (a) What is the driving force for Na+, and what is the driving force for K+ at the resting potential? Just give a number, don’t describe what a driving force is in words. (b) What is the relative resistance of the cell membrane for sodium and potassium (i.e. how many times greater or less than the RK must...
8. Consider a neuron whose resting potential is -60 mV, and the EK = -100 mV...
8. Consider a neuron whose resting potential is -60 mV, and the EK = -100 mV and the ENa = +40 mV. a) What is the driving force for Na+, and what is the driving force for K+ at the resting potential? Just give a number, don’t describe what a driving force is in words. b) What is the relative resistance of the cell membrane for sodium and potassium (i.e. how many times greater or less than the RK must...
Which statement below best explains why ion movement through channels generates a membrane potential but ion...
Which statement below best explains why ion movement through channels generates a membrane potential but ion movement generated by the Na+/K+ pump does not? The concentration of K+ is higher inside the cell, while the concentration of Na+ is higher outside. The slow action of the pump creates a small change in the membrane potential. Ions move rapidly through ion channels, specialized pores in the membrane that allow ions to diffuse back and forth, carrying charge. The net movement of...
7. Which of the following ion(s) is in highest concentration outside the neuron cell membrane in...
7. Which of the following ion(s) is in highest concentration outside the neuron cell membrane in a resting state? a. Chloride (Cl) and potassium (K) b. Potassium (K) only c. Magnesium (Mg2) d. Chloride (Cl) and sodium (Na) e. Nitric oxide (NO) 8. A neurotransmitter may be described as “excitatory” (leads to depolarization) or “inhibitory” (no change or hyperpolarization). Which of the following determines the action of the neurotransmitter? a. The type of charges (or¨)on the neurotransmitter b. The type...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT