OpenStax Biology 2e Instructor Answer Guide
Biology 2e
Unit 7: Animal Structure and Function
Chapter 35: The Nervous System
Visual Connection Questions
1. Which of the following statements is false?
b. Myelin sheath provides an insulating layer to the dendrites.
2. Potassium channel blockers, such as amiodarone and procainamide, which are used to treat
abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of
K+ through voltage-gated K+ channels. Which part of the action potential would you expect
potassium channels to affect?
Potassium channel blockers slow the repolarization phase, but have no effect on depolarization.
, OpenStax Biology 2e Instructor Answer Guide
3. Which of the following statements is false?
d. Parasympathetic neurons are responsible for releasing norepinephrine on the target organ,
while sympathetic neurons are responsible for releasing acetylcholine.
Review Questions
4. Neurons contain ________, which can receive signals from other neurons.
c. dendrites
5. A(n) ________ neuron has one axon and one dendrite extending directly from the cell body.
b. bipolar
6. Glia that provide myelin for neurons in the brain are called ________.
b. oligodendrocytes
7. Meningitis is a viral or bacterial infection of the brain. Which cell type is the first to have its
function disrupted during meningitis
a. Astrocytes
8. For a neuron to fire an action potential, its membrane must reach ________.
b. the threshold of excitation
Biology 2e
Unit 7: Animal Structure and Function
Chapter 35: The Nervous System
Visual Connection Questions
1. Which of the following statements is false?
b. Myelin sheath provides an insulating layer to the dendrites.
2. Potassium channel blockers, such as amiodarone and procainamide, which are used to treat
abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of
K+ through voltage-gated K+ channels. Which part of the action potential would you expect
potassium channels to affect?
Potassium channel blockers slow the repolarization phase, but have no effect on depolarization.
, OpenStax Biology 2e Instructor Answer Guide
3. Which of the following statements is false?
d. Parasympathetic neurons are responsible for releasing norepinephrine on the target organ,
while sympathetic neurons are responsible for releasing acetylcholine.
Review Questions
4. Neurons contain ________, which can receive signals from other neurons.
c. dendrites
5. A(n) ________ neuron has one axon and one dendrite extending directly from the cell body.
b. bipolar
6. Glia that provide myelin for neurons in the brain are called ________.
b. oligodendrocytes
7. Meningitis is a viral or bacterial infection of the brain. Which cell type is the first to have its
function disrupted during meningitis
a. Astrocytes
8. For a neuron to fire an action potential, its membrane must reach ________.
b. the threshold of excitation
