Quiz 1 Unit 3 Psych

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Which of the following is the correct sequence of the neural chain of events set in motion by an environmental stimulus?

A) Receptors, afferent neurons, interneurons, efferent neurons, effectors

Which of the following is true of a neuron in the resting state?

A) The inside of the cell membrane is negative compared to the outside.

Which of the following occurs when a neuron is stimulated to its threshold?

A) The movements of sodium and potassium ions across the membrane creates an action potential.

Information is relayed to the spinal cord or the brain by

A) afferent neurons

Curare blocks action at acetylcholine synapses and causes paralysis. This drug is an example of an

A) antagonist

The primary effect of the myelin sheath is to

A) increase the velocity of conduction of the action potential along the axon

The function of dendrites is to

A) receive information from other neurons

Which of the following are NOT part of a neuron?

A) synapses

The drugs that block the reabsorption of neurotransmitters in the synapse during neural transmission are

A) SSRIs

C) Axon terminals

The area labeled X in the drawing above denotes which of the following structures?

The depletion of which of the following neurotransmitters is most closely associated with the symptoms of Alzheimer's disease?

B) Acetylcholine

Which of the following neurotransmitters has been linked to Parkinson's disease and schizophrenia?

B) Dopamine

Juana accidentally touched a hot iron. She immediately drew back her hand. Which of the following is true about the withdrawal of her hand?

B) It was initiated in the spinal cord.

Which part of the nervous system is most immediately activated by sudden fear?

B) Sympathetic

The part of the neuron that is responsible for receiving signals from other neurons is called

B) a dendrite

Reuptake of a neurotransmitter refers to

B) absorption of the neurotransmitter into the terminal buttons of the sending neuron

A drug that has the effect of intensifying or mimicking a particular neurotransmitter can be characterized as

B) an agonist, because it intensifies the effects of a particular neurotransmitter

Painkilling substances produced by the brain are known as

B) endorphins

The time shortly after a neuron fires is referred to as

B) the refractory period

During neuronal firing, the part of the neuron that acts as an insulator and conductor to speed the electrical impulse as it travels down the axon is

B) the myelin sheath

Joel's pupils become dilated, his digestion is reduced, and his skin becomes cold. Which system is controlling his bodily changes?

C) Sympathetic

A person accidentally touches a hand to a hot stove and quickly pulls the hand away, even before sensory information about the hot stove reaches the brain. The person's reaction is most directly enabled by

C) a spinal reflex

Neurotransmitters are typically stored in which of the following parts of a neuron?

C) the terminal button

Activation of the sympathetic branch of the autonomic nervous system results in

C) an increase in respiratory rate

Which of the following is classified as an antagonist?

D) A tricyclic antidepressant, because they block serotonin and norepinephrine transporters.

The autonomic nervous system is most directly involved in

D) digesting food

The process by which neurotransmitters are reabsorbed into the neuron after it fires is called

D) reuptake

Immediately after firing, a neuron is incapable of responding to stimulation. This condition is referred to as

D) the absolute refractory phase

The sequence of shifts in the electrical charge of a neuron is called

D) the action potential

Activation of the parasympathetic nervous system results in which of the following?

E) A decrease in heart rate

The role of the parasympathetic division of the autonomic nervous system is to

E) establish homeostasis after a fight-or-flight response

Dopamine, norepinephrine, and acetylcholine are all

E) neurotransmitters that excite or inhibit a neural signal across a synapse

D

Which letter indicates the synaptic cleft?


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