Question

question 19 1 pts if the threshold potential is surpassed, the full peak of the action potential is always reached. false true question 20 1 pts neurons are the only living cells that maintain a difference in the concentration of ions across their membranes. true false question 21 1 pts the membrane potential maintained by a nonconducting neurons plasma membrane is called the ______ membrane potential. action resting conduction polarized

Explanation:

• Question 19: The all - or - none law states that once the threshold potential is reached, an action potential with a consistent amplitude will occur. So, if the threshold potential is surpassed, the full peak of the action potential is always reached.
• Question 20: Many living cells maintain a difference in ion concentration across their membranes, not just neurons. For example, muscle cells also have ion gradients.
• Question 21: The membrane potential of a non - conducting neuron's plasma membrane is called the resting membrane potential.

Answer:

• Question 19: True
• Question 20: False
• Question 21: B. resting