Nueroscience

The _____ stimulates the release of neurotransmitters, allowing neurons to communicate with each other.

action potential

The action potential travels down the length of the axon. When it reaches the _____, the neurotransmitters are released into the synapse.

axon terminal

The correct order of the structures of the motor neuron is:

dendrites, cell body, axon, and terminal branches of the axon

Donna has been suffering from depression. Her psychiatrist prescribes Prozac, which works by blocking the reuptake of serotonin, thus increasing the amount of serotonin in her brain. Prozac works as a(n):

agonist

A hunter in a South American jungle uses the poisonous drug curare on the tip of his arrow. When the arrow strikes an animal, the animal becomes almost instantly limp and quickly suffocates because its respiratory system has become paralyzed. The drug has _____ the neurotransmitter acetylcholine.

blocked the receptors for

Information is transmitted inside the neuron as a(n) _____ signal, and information transmission between neurons is almost always a(n) _____ signal.

electrical ; chemical

Tyler has been diagnosed with a disease that involves deterioration of the myelin sheath. As the disease progresses, he begins to have trouble with his coordination. This is caused by:

his neurons communicating slowly and inefficiently

Bobby is studying for a psychology exam. Using his brain's 90 billion nerve cells, or _____, and roughly 100 trillion points of communication, he looks out the window and is able to see birds flying around outside.

neurons

Every time a segment of an axon fires, the _____ flood in from the outside of the cell, while the prior segment returns to its resting potential.

positive sodium ions

If a neuron was compared with a prison, the sodium ions could be compared with the _____ when the neuron is repolarizing.

prisoners

Jorge cannot feel his left leg after being struck by a car, but he can still move it and walk on it. It is MOST likely that he damaged his _____, but his motor neurons are still intact.

sensory neurons

The minimum level of stimulation required to activate a particular neuron is called the _____ threshold.

stimulus

Devan is studying for his midterm and is quizzing himself on the topic of neurons. He is trying to figure out the name for that "tiny space" where neurons connect, which is the:

synaptic gap

Dendrites transmit messages _____ the cell body, and axons transmit messages _____ the cell body.

toward ; away from