Multiple Choice
In a typical reflex arc, what is the name of the nerve cell that connects sensory neurons to motor neurons within the central nervous system?
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9. Transport Across Membranes
Ion Channels and Neurons
Multiple Choice
In the context of ion channels and neuronal signaling, what is the primary function of a nerve cell (neuron)?
A
To receive, integrate, and transmit information by generating and propagating electrical signals (action potentials) and chemical signals at synapses
B
To carry oxygen throughout the body by binding it to hemoglobin and transporting it in circulation
C
To provide the main mechanical support for tissues by producing and organizing extracellular collagen fibers
D
To synthesize and secrete steroid hormones directly into the bloodstream to regulate distant target tissues
Verified step by step guidance1
Step 1: Understand the role of neurons in the nervous system. Neurons are specialized cells designed to process and transmit information through electrical and chemical signals.
Step 2: Recognize that neurons generate electrical impulses called action potentials, which allow them to transmit signals rapidly along their axons.
Step 3: Know that neurons receive signals from other cells at synapses, integrate these inputs, and then propagate signals to other neurons or effector cells.
Step 4: Differentiate neurons from other cell types by their unique function: unlike red blood cells (which carry oxygen), fibroblasts (which produce collagen), or endocrine cells (which secrete hormones), neurons specialize in communication.
Step 5: Conclude that the primary function of a nerve cell is to receive, integrate, and transmit information by generating and propagating electrical signals (action potentials) and chemical signals at synapses.
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