How Is Expression of OR Proteins Controlled

question 19

Multiple Choice

How is expression of OR proteins controlled?

• A) Expression is controlled by stimuli from the environment.
• B) Expression is activated by feedback mechanisms from the olfactory sensory system.
• C) Each olfactory neuron produces only one OR receptor protein.
• D) All neurons produce the OR proteins, as there is no reason to increase or decrease expression.
• E) Each neuron produces a subset of related OR proteins, under control of a common stimulus.

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Definitions:

Whole Blood

Blood with all its components (red blood cells, white blood cells, plasma, and platelets) intact.

Hemolytic Transfusion Reaction

An adverse response following a blood transfusion, where the recipient's immune system destroys the transfused red blood cells, leading to potentially severe complications.

Nonhemolytic Febrile Reaction

A type of transfusion reaction characterized by fever without the destruction of red blood cells, typically caused by antibodies against donor white blood cells.

Intravenous Cannula

A thin tube inserted into a vein, usually in the hand or arm, to administer medications, fluids, or to collect blood samples.