Ch. 12 Review

What is the general pathway of the Nervous System?

• Sensory Receptors -> Sensory Neurons -> Central Nervous System -> Motor Neurons -> Effectors.

• Sensory Neurons -> Central Nervous System -> Effectors -> Motor Receptors
• Effectors -> Sensory Receptors -> Sensory neurons -> Central Nervous System -> Motor Neurons

• Central Nervous System -> Effectors -> Sensory Receptors -> Motor Neurons

What is the correct statement concerning graded and action potentials?

• Graded potentials are always stronger than action potentials.
• Graded potentials can summate, short distance, and lead to action potentials.

• Action potentials can summate to form graded potentials and are considered long distance.

• Graded potentials do not affect the generation of action potentials.

What are the 5 main phases of a potential?

• Refractory Period, Depolarization, Repolarization, and Hyperpolerization

• Research, Design, Testing, Launch, Feedback
• Depolarization, Repolarization, Hyperpolerization, and Refectory Period

• Resting Membrane, Depolarization, Repolarization, Hyperpolerization, and Refractory Period

What channel helps to maintain the resting membrane potential?

• Sodium channels
• Sodium-Potassium pump

• Calcium channels
• Chloride pump

What is false concerning what happens in each phase of an action potential?

• An excess amount of potassium ions leave the neuron during hyperpolarization.

• Sodium ions exit the neuron during depolarization.
• Sodium ions enter of the neuron during depolarization.

• Potassium ions exit the neuron during repolarization.

What occurs at the synapse?

• Neurotransmitters enter the postsynaptic neuron.

• Hormones are released at the synapse.
• Calcium leaves the neuron.

• Neurotransmitter release and receptor binding occur at the postsynaptic neuron.

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