11 Questions
Which division of the nervous system communicates to smooth muscle, cardiac muscle, glands, and adipose tissue?
Sympathetic nervous system
What are the two main branches of the efferent division of the nervous system?
Sympathetic and parasympathetic nervous systems
Which type of glial cells function in forming myelin around axons in the central nervous system?
Oligodendrocytes
What is the main factor responsible for maintaining the resting membrane potential in cells?
Sodium-potassium pump
Depolarization of a neuron to threshold stimulates
Opening of sodium channels.
Which of the following glial cells are present in the peripheral nervous system?
Schwann cells
If a cation is equally distributed across the cell membrane, which of the following statements is false?
At 270 mV, the electrical force on the ion acts to move it into the cell.
The depolarization phase of an action potential is caused by
Opening of sodium channels.
What is the function of the Na+>K+ pump in a neuron?
All of the above
What is the purpose of the Na+>K+ pump in preventing changes in concentration gradients?
To transport more sodium and potassium ions to compensate for the greater movement of these ions through opened voltage-gated channels
What is the effect of fiber diameter and myelination on the conduction velocity of action potentials?
Both fiber diameter and myelination increase the conduction velocity of action potentials
Quiz: Mastering the Na+>K+ Pump in Neurons Test your knowledge on the Na+>K+ pump in neuron membranes! This quiz will challenge your understanding of how the pump develops and sustains concentration gradients, and its role in maintaining cell function.
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