Exam 27: Nervous, Sensory, and Locomotor Systems

In the figure, in which step is threshold reached if the stimulus is strong enough and a sufficient number of channels open?

Which structure(s)carry incoming messages toward the cell body of a neuron?

The voltage level that triggers an action potential is called the ________.

Standing out in center field, a baseball player watches a hitter's bat strike the ball and then, slightly later, hears the sound of the impact. What types of sensory receptors did the player just use?

What happens during integration in the nervous system?

In all types of chemoreceptors, receptor cells develop receptor potentials in response to ________.

You start an exam and realize that you did not study enough for it. You find it difficult to concentrate because your heart is racing, your stomach seems tied in a knot, you are breathing too quickly, and your mouth is dry. Most likely, you are experiencing the effects of the ________.

________ is a(n)example of sensory adaptation.

Which one of the following statements is TRUE?

The cells that carry electric signals from one part of the body to another in the nervous system are ________.

Which structure would probably have the largest motor units?

Scenario Amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, is a fatal disorder characterized by muscle weakness. Stumbling when walking or difficulty with using a hand is a typical early symptom. Individuals with ALS lose the ability to consciously control movement, though cognitive and sensory functions generally remain unimpaired. There is currently no cure for ALS. -In ALS, sensory input and integration are unaffected, and muscle cells still respond to neurotransmitters when they are present. Which structure would you recommend scientists to study to find a cure for ALS?

Which parts of the body comprise the central nervous system (CNS)?

How do neurotoxins benefit humans?

Alzheimer's disease is characterized by ________.

I The joint that allows you to rotate your forearm so that your hand changes from a palm up position to a palm down position must be a ________ joint.

What best helps a broken bone heal?

Which human traits are based in the cerebral cortex?

A person who cannot focus well on distant objects has ________.

Scenario Amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, is a fatal disorder characterized by muscle weakness. Stumbling when walking or difficulty with using a hand is a typical early symptom. Individuals with ALS lose the ability to consciously control movement, though cognitive and sensory functions generally remain unimpaired. There is currently no cure for ALS. -Given the symptoms of ALS, what part of the nervous system is functioning abnormally?