An Infant Who Obtains Nourishment from Milk and Who Has

question 80

Multiple Choice

An infant who obtains nourishment from milk and who has galactosemia is unable to convert

• A) galactose-1-P to glucose-6-P.
• B) glucose-6-P to galactose-1-P.
• C) galactose-1-P to glucose-1-P.
• D) glucose-1-P to galactose-1-P.

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Definitions:

GABA

Gamma-Aminobutyric Acid, an inhibitory neurotransmitter in the central nervous system that plays a key role in reducing neuronal excitability throughout the nervous system.

Receptor Downregulation

A decrease in the number of receptors on the surface of target cells, often in response to high levels of a hormone or neurotransmitter.

Cyclic AMP

A second messenger important in many biological processes, involved in the activation of protein kinases and regulation of the effects of adrenaline and glucagon.

G Proteins

A family of proteins that act as molecular switches inside cells, involved in transmitting signals from stimuli outside the cell.