Unit 2 MCQ

Which hormone is released when a person is under stress?

Cortisol is released by the adrenal gland when people are stressed.

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

Freud

Which of the following best describes a major role of the thalamus?

It relays most sensory signals to the cortex. All sensory signals, except for olfactory signals, reach the cortex by first passing through the thalamus.

Madeline has previously been diagnosed with major depressive disorder. She has an identical twin sister, Josephine, and a nonidentical sister, Abigail. Neither of Madeline's sisters have previously been diagnosed with major depressive disorder. Which of the following statements is true of Madeline's sisters?

Josephine is more likely to be diagnosed with major depressive disorder than Abigail in response to a stressful or traumatic event. Josephine likely has a higher predisposition for major depressive disorder because she shares all her genes with Madeline, who has previously been diagnosed.

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

after cycling through the NREM sleep stages REM sleep occurs after other NREM sleep stages have been cycled through

A neuron sends a signal along its

axon Each signal is received by a neuron's dendrites and sent along its axon.

Antagonists function by

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

The hormone most associated with the fight or flight response is

epinephrine (another name for adrenaline)

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

fatigue

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

definition of an agonist.

mimicking neurotransmitters that bind to neural receptors to cause neural firing

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

myelin sheath The myelin sheath surrounds the axon and helps to speed the neural transmission along the axon.

Michael Gazzaniga is best known for

split brain patients

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 parietal lobe is most involved in

processing sensory information The parietal lobe processes and integrates sensory information, including taste, hearing, sight, touch, and smell.

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. Agonists increase the effectiveness of a neurotransmitter at the receiving neuron.

The medulla oblongata is a part of the

brainstem The medulla oblongata is part of the brain stem, which regulates basic body functions such as respiration and blood circulation.

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

A person whose body is producing too much testosterone is most likely to exhibit

overly aggressive behavior