Based on the Biosynthetic Pathway of Catecholamines Presented in Figure

question 10

Multiple Choice

Based on the biosynthetic pathway of catecholamines presented in figure 13.12, In the text which of the following would result in an increase in norepineprine?

• A) inhibition of tyrosine hydroxylase
• B) increase in available dopamine
• C) a genetic mutation in the gene for dopamine beta-hydroxylase
• D) depletion of the amino acid L-tyrosine
• E) all of the above

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Definitions:

Grasshoppers

Insects belonging to the suborder Caelifera, known for their powerful hind legs that allow them to leap and their role in various ecosystems as herbivores.

Hemoglobin

A protein in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.

Sinuses

Air-filled spaces located within the bones of the face and skull, connected to the nasal cavities, which help humidify and filter air.

Erythrocyte

A vertebrate red blood cell; contains hemoglobin, which transports oxygen. Compare with leukocyte.