Questions and Answers
Which of the following is probably going to propagate an action potential fastest?
Which of the following is the gateway to the cerebrum?
Which of the following neurotransmitters is associated with inhibition exclusively?
Which of the following is the motor command center?
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Which of the following is the visceral command center?
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It performs the 'executive' functions.
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Which of the following substances is least able to cross the blood-brain barrier?
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Which of the following is the survival center?
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Is the name of the frontal eye field area.
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Which of the following relationships is true?
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The medulla oblongata descends as the spinal cord.
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Which of the following is the executive suite?
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Which of the following cavities contains a component of the central nervous system?
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Which of the following voltages would most likely be measured during the relative refractory period?
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Study Notes
Action Potential
- The fastest propagation occurs in a thick, myelinated axon due to reduced resistance and faster signal transmission.
Cerebral Gateway
- The thalamus serves as the primary gateway to the cerebrum, relaying sensory and motor signals to the cerebral cortex.
Neurotransmitter Inhibition
- GABA (gamma-aminobutyric acid) is the primary neurotransmitter associated exclusively with inhibitory functions in the nervous system.
Motor Command Center
- The cerebellum is responsible for coordinating voluntary movements and fine-tuning motor commands.
Visceral Command Center
- The hypothalamus regulates visceral functions such as temperature, hunger, and the sleep-wake cycle.
Medulla Oblongata Functions
- The medulla oblongata does not perform executive functions; it primarily manages vital reflexes and autonomic functions.
Blood-Brain Barrier
- White blood cells are least able to cross the blood-brain barrier, which protects the central nervous system from pathogens.
Survival Center
- The brain stem is crucial for survival functions, controlling essential processes such as heart rate and respiration.
Broca's Area
- Broca's area is not associated with the frontal eye field; it is involved in language production and verbal communication.
Lobe Functions
- The occipital lobe is directly responsible for processing visual information.
Medulla Oblongata and Spinal Cord
- The medulla oblongata is continuous with the spinal cord, ensuring the passage of signals between the brain and body.
Executive Function Center
- The cerebrum acts as the executive suite of the brain, overseeing higher cognitive functions, decision making, and reasoning.
CNS Cavities
- The cranial cavity houses components of the central nervous system, including the brain and protective meninges.
Relative Refractory Period Voltage
- A voltage of approximately -80 mV is typically recorded during the relative refractory period, indicating a state where the neuron is less excitable but can still respond to strong stimuli.
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Description
Test your knowledge on key concepts in neuroscience, including action potentials, neurotransmitter functions, and brain structures. This quiz covers fundamental topics such as the role of the thalamus, cerebellum, and hypothalamus in the nervous system. See how well you understand the intricacies of brain function and communication.
