Cellular Physiology Quiz

What is the primary component of intracellular fluid (ICF)?

• Calcium (Ca2+)

• Chloride (Cl-)

• Potassium (K+)

• Sodium (Na+)

Which transport mechanism requires ATP as a direct energy source?

• Simple diffusion

• Secondary active transport

• Primary active transport

• Facilitated diffusion

What percentage of total body water is typically intracellular fluid (ICF)?

• One third

• Two thirds

• Half

• Three quarters

Which ion is the major cation in extracellular fluid (ECF)?

• Sodium (Na+)

• Magnesium (Mg2+)

• Calcium (Ca2+)

• Potassium (K+)

What is the primary role of the Na+-K+ ATPase?

• Facilitate diffusion of water

• Maintain concentration gradients of Na+ and K+

• Transport glucose into cells

• Generate action potentials

What is the typical pH of extracellular fluid (ECF)?

• 7.4

• 7.0

• 6.8

• 8.0

Which of the following is a characteristic of cell membranes?

• Uniform composition across all compartments

• Low permeability to lipid-soluble substances

• High permeability to water-soluble substances

• Composed primarily of lipids and proteins

What is the Gibbs-Donnan effect primarily related to?

• Membrane fluidity

• Osmolarity differences

• Protein exclusion in plasma

• Ion channel activity

Which type of transport does not require a protein carrier?

• Facilitated diffusion

• Active transport

• Secondary active transport

• Simple diffusion

What is the main function of neurotransmitters?

• Transport ions across membranes

• Transmit information between cells

• Maintain resting membrane potential

• Facilitate glucose absorption