Exam 30: Nervous and Sensory Systems

An action potential weakens with distance traveled.

Neurotransmitters are released into a synaptic cleft by the process of ________.

We perceive pressure waves in air as ________.

In research with mice,scientists found that proper amounts of sleep may help the brain

The branched receiving ends of a nerve cell are called

The axons of many individual neurons may be bundled together to form communication pathways known as ________.

The cell indicated by the arrow in the figure below directly interacts with environmental stimuli.

The largest,most visible part of the human brain is the

The figure below depicts a human eye. When focusing on an object that is far away,the structure indicated by the arrow in the figure above

A resting neuron is negatively charged inside relative to the outside.

In regard to the peripheral nervous system (PNS),signals that occur involuntarily are under autonomic control.

If a stimulus is strong enough to reach a threshold level,

Which of the following is NOT one of the three major regions of the human brain?

The area of the brain that filters and sorts signals from the spinal cord also determines which signals require an action without awareness and which signals need to be sent to the conscious perception centers.This area of the brain is known as the

A reflex arc

Brain activity is the same in all vertebrates during sleep.

How does the central nervous system recognize how important a particular stimulus is?

To best help it sniff out a fox,a hunting dog probably has a high concentration of

Action potentials move faster in myelinated nerve fibers because

Initially,when a neuron receives a stimulus,