FY Bpharm

The resting membrane potential of a neuron is primarily maintained by:

• Na⁺/K⁺ ATPase pump actively transporting Na⁺ out and K⁺ in

• Passive diffusion of Na⁺ and K⁺ across the membrane

• Ca²⁺ channels regulating ion distribution

• Influx of Cl⁻ ions stabilizing the membrane potential

Which of the following statements regarding UV-Visible Spectrophotometry is correct?

• Beer’s Law states that absorbance is directly proportional to concentration

• The transmittance of a solution increases as the absorbance increases

• Molar absorptivity (ε) is dependent on the path length but not on the concentration

• A compound absorbing at 254 nm is likely to contain a ketone functional group

The solubility of a sparingly soluble salt (MX) in water is best described using which of the following equilibrium expressions?

• Ksp = [M⁺][X⁻]

• Ksp = [M⁺]²[X⁻]

• Ksp = [M⁺][X⁻]²

• Ksp = [M⁺]²[X⁻]²

In micromeritics, which of the following statements about angle of repose is correct?

• A lower angle of repose indicates better flow properties

• Angle of repose is independent of particle size

• An increase in surface roughness decreases flowability

• Cohesive powders have a lower angle of repose than free-flowing powders

In professional communication, paralanguage refers to:

• Tone, pitch, and speed of speech

• Hand gestures and facial expressions

• Written structure and grammar of a message

• Use of technical jargon and complex vocabulary

In differential equations, the function dy/dx = ky represents:

• An exponential growth or decay function

• A linear function

• A logarithmic function

• A trigonometric function

The Frank-Starling mechanism in cardiac physiology states that:

• Increased end-diastolic volume leads to increased stroke volume

• Increased heart rate directly increases contractility

• The heart rate is solely controlled by the sympathetic nervous system

• Higher afterload always results in a stronger contraction

The primary standard in acid-base titration must have which of the following properties?

• High purity, stability, and known composition

• Ability to change color at a specific pH

• High solubility in both aqueous and non-aqueous solvents

• Strong reactivity to minimize errors in measurement

The hardness of water is primarily due to the presence of:

• Ca²⁺ and Mg²⁺ ions

• Na⁺ and K⁺ ions

• Cl⁻ and SO₄²⁻ ions

• Fe²⁺ and Fe³⁺ ions

Hygroscopic substances are those that:

• Absorb moisture from the atmosphere without dissolving

• Form colloidal dispersions in water

• Decrease in weight when exposed to air

• Exhibit efflorescence when stored in humid conditions