When 200 ML of Water Are Added to 100

question 30

Multiple Choice

When 200. mL of water are added to 100. mL of 12% KCl solution the final concentration of KCl is (Assume the volumes add.)

• A)12%.
• B)4.0%.
• C)36%.
• D)6.0%.
• E)8.0%.

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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.