Exam 30: Nervous and Sensory Systems

Botulism is a type of paralysis (inability to move muscles)caused by a specific type of bacteria.The bacteria release a toxin that prevents the release of acetylcholine (a neurotransmitter)from the neurons that form synapses with muscle cells.Why might botulism toxin cause paralysis?

Action potentials and resting potentials are the same thing.

A drug that decreases your ability to taste and smell might inhibit the function of

In vertebrates,special cells produce an insulating sheath of ________ that wraps around the axon of a neuron.

Everyone who abuses drugs from an early age will become an addict.

A drug that inhibits the function of mechanoreceptors would affect your sense of

Although many people worry about their sodium intake from salty foods,it would be unwise to eliminate sodium from one's diet completely.Which of the following problems would occur if there were no sodium in the body?

Brain activity rises during ________ sleep.

Nodes of Ranvier are found only in ________ neurons.

Which of the following is the pathway an action potential would travel in a neuron?

At resting potential,the charge outside the neuron's plasma membrane is

To respond to an incoming signal,such as your fingertip being burned by a candle's flame,the signal must be transmitted to the brain before your muscles can be told to respond and pull away.

Which of the following would NOT be found in the eyes of a horse?

Action potentials can transmit information rapidly but weaken as they move along a neuron.

The flow of ions across an axon's plasma membrane generates an electrical impulse known as the ________.

When a signal causes sodium ions to flow into a neuron it becomes ________.