Exam 7: Neurons: the Matter of the Mind

Prescription drugs like Prozac help maintain higher levels of serotonin in the brain.What effect will this have on an individual?

Which of the following is a chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?

Some drugs modulate the activity of ion channels.For example,Novocain somewhat inhibits the opening of sodium channels.What happens to the threshold of a sensory neuron if this drug is used?

During an action potential,the ________ ions rush into the axon.

Motor neurons that carry information away from the brain or spinal cord are known as ________ neurons.

Muscle cells that are not exercised will atrophy or shrink in size.Lou Gehrig's disease affects nervous tissue but also causes muscle atrophy.What type of nerve cell must be affected to cause this muscle-wasting condition?

Your sister Henriette has little muscle strength.Her doctor says she has an autoimmune disease but you didn't quite catch the name the physician gave for the illness.Looking at this chapter,what do you think the diagnosis is?

Infants require many nutrients early in life,including lipids such as fats.A low-fat diet for infants is not recommended because,among other things,it can impact the development of the nervous system.What could be affected?

Match each definition in the first column to the correct term in the second column. -The junction between a neuron and another cell.

The ________ can be defined as the specific value a membrane depolarization reaches to begin an action potential.

A nerve impulse does not vary in intensity with regard to the strength of the stimulus.This is known as what principle?

Match each definition in the first column to the correct term in the second column. -Synapse in which neurotransmitters allow sodium to enter the postsynaptic cell.

Match each definition in the first column to the correct term in the second column. -Membrane proteins that allow specific charged molecules to pass through from one side of the membrane to the other.

In saltatory conduction,nerve impulses jump from one exposed region of the axon to another.This exposed region is called the ________.

Inhaling or "huffing" is a way to achieve a high usually by breathing in a fat-soluble substance.Which of the following structures would be most likely attacked first?

A(n)________ synaptic neuron releases neurotransmitters that act on the ________ synaptic neuron to start an action potential.

Where are neurotransmitters stored in a neuron?

________ form the myelin sheath,which wraps around the axon,to insulate against short-circuiting between neurons.

Ahmad might have been accidentally exposed to an insecticide while he worked in a citrus grove.What symptoms of poisoning would you watch for?

An action potential would most commonly arrive from which of the following structures before arriving at the axon?