Quiz 1 Unit 3 Psych
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?
