Problem 1
Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgi bodies
Problem 1
The part of the brain that is responsible for coordination during movement is the _____. a. limbic system b. thalamus c. cerebellum d. parietal lobe
Problem 1
Figure 17.8 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 \(\mathrm{K}+\) through voltage- gated \(\mathrm{K}+\) channels. Which part of the action potential would you expect potassium channels to affect?
Problem 2
A(n) ________ neuron has one axon and multiple dendrites. a. unipolar b. bipolar c. multipolar d. pseudounipolar
Problem 2
Which part of the nervous system directly controls the digestive system? a. parasympathetic nervous system b. central nervous system c. spinal cord d. sensory-somatic nervous system
Problem 2
For a neuron to fire an action potential, its membrane must reach________. a. hyperpolarization b. the threshold of excitation c. the refractory period d. inhibitory postsynaptic potential
Problem 3
How are neurons similar to other cells? How are they unique?
Problem 3
After an action potential, the opening of additional voltage-gated _____ channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential. a. sodium b. potassium c. calcium d. chloride
Problem 3
What are the main functions of the spinal cord?
Problem 4
What are the main differences between the sympathetic and parasympathetic branches of the autonomic nervous system?
