Which of the Following Statements Is Correct

question 50

Multiple Choice

Which of the following statements is correct?

• A) iron absorption from the gut occurs at a rate which is independent of the quantity of body iron stores
• B) ferritin is responsible for storage of most of the body iron
• C) transferrin is a large spherical cluster of protein molecules capable of binding thousands of iron hydroxide molecules
• D) iron is transported in blood chiefly as hemosiderin
• E) iron is transported as both Fe+2 and Fe+3

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Definitions:

Stimulus

An event or object that evokes a specific response from an organism or system.

Hebb Rule

a theory in neuroscience that proposes an increase in synaptic efficacy arises from the presynaptic cell's repeated and persistent stimulation of the postsynaptic cell.

Synapse

A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

Long-Term Potentiation

A process, hypothesized to be a mechanism for long-term learning, in which neural circuits in the hippocampus are subjected to repeated and intense electrical stimulation, resulting in hippocampal cells that are more sensitive to stimuli than they were previously.