Select the correct statement about serial processing.

Select the correct statement about serial processing. 

A) Spinal reflexes are an example of serial processing.
B) Input travels along several different pathways.
C) Smells are processed by serial pathways.
D) Memories are triggered by serial processing.



Answer: A) Spinal reflexes are an example of serial processing.

Neurons may be classified according to several characteristics. Which of the following is correct?

Neurons may be classified according to several characteristics. Which of the following is correct? 

A) Group A fibers are mostly somatic sensory and motor and are the smallest in diameter.
B) Group B fibers are highly myelinated and have the highest conduction velocities.
C) Group C fibers are not capable of saltatory conduction.
D) A small cross-sectional area allows shorter conduction times.



Answer: C) Group C fibers are not capable of saltatory conduction.

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________.

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________. 

A) the impulse would move to the axon terminal only
B) muscle contraction would occur
C) the impulse would spread bidirectionally
D) the impulse would move to the axon terminal only, and the muscle contraction would occur


Answer: C) the impulse would spread bidirectionally

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is ________.

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is ________. 

A) positively charged and contains less sodium
B) negatively charged and contains less sodium
C) negatively charged and contains more sodium
D) positively charged and contains more sodium


Answer: B) negatively charged and contains less sodium

A second nerve impulse cannot be generated until ________.

A second nerve impulse cannot be generated until ________. 

A) the membrane potential has been reestablished
B) the Na ions have been pumped back into the cell
C) proteins have been resynthesized
D) all sodium gates are closed


Answer: A) the membrane potential has been reestablished

________ is an indolamine.

________ is an indolamine. 

A) Dopamine
B) Epinephrine
C) Serotonin
D) Tyrosine



Answer: C) Serotonin