psych

A neuron sends a signal along its

axon

A drug that is used to treat seizures functions by preventing inhibitory neurotransmitters from returning to the presynaptic neuron. This slows the rate of neurons firing by increasing the amount of the inhibitory neurotransmitter in the synapse. The drug is most likely to be classified as a

GABA

The fatty casing that helps speed up the neural transmissions of a neuron is called the

Myelin Sheath

Which of the following describes what happens when a neuron sends a signal?

The neuron goes from being negatively charged to briefly being positively charged, and finally returns to being negatively charged again. The magnitude of the negative charge is fixed regardless of the strength of the input signal it receives.

If a body does not have enough potassium, how might that affect neuronal firing?

The neurons will struggle to fire because there will not be enough positively charged ions to trigger the firing of the neuron.

At a synapse, neurotransmitters released by the sending neuron do which of the following?

They bind to receptors at the receiving neuron, which opens ion channels.

What effect do agonists have?

They increase the likelihood that a postsynaptic neuron will fire.

The phenomenon of declining physiological effects of taking a drug after sustained use is referred to as

Tolerance

Antagonists function by

blocking receptors to prevent other neurotransmitters from binding to the neural receptors

The psychodynamic theory of dreaming would postulate that

dreams fulfill unconscious wishes

Johnny often hits his brother even though his brother does not do anything to antagonize him. Johnny's aggression is most likely due to a combination of

his genetic makeup, the environment he grew up in, and the fact that aggression can be evolutionarily adaptive

Carl Wernicke discovered the region of the brain that is responsible for

language comprehension

Ruth and Debbie are identical twins who were raised by the same family. Vince and Frankie are identical twins who were separated at birth and raised by different families. According to research on the heritability of personality traits, Ruth's and Debbie's personalities are statistically

likely to be as similar and dissimilar to one another as are Vince's and Frankie's personalities