psych unit 2 test 2

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.

an adult with a healthy sleep cycle is most likely to enter REM cycle

after cycling through the NREM sleep stages

a neuron sends a signal along its

axon

antagonists function is

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

the medulla oblongata is a part of the

brain stem

which hormone is released when a person is under stress

cortisol

which of the following best describes a major role of the thalamus

it relays most sensory signals to the cortex

carl wernicke discovered the region of the brain that id responsible for

language comprehension

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

myelin sheath

the parietal lobe is most involved in

processing sensory information

The idea that there is a part of the mind that is not directly accessible to awareness but still drives a person's thinking and behavior is most directly attributable to

sigmund freud

Waking up frequently, loud snoring, silent pauses in breathing, and sleepiness during the day are symptoms of

sleep apnea

michael gassaniga is best known for

studying split brain patients

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 channel

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

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 reuptake inhibitor (GRI)

the psychodynamic theory of dreaming would postulate that

dreams fulfill unconscious wishes

the hormone most associated with the fight or flight response is

epinephrine

a person whose body is not producing enough testosterone is most likely to exhibit

fatigue