Sally Wants to Know What Percentage of Canadian University Students

question 50

Multiple Choice

Sally wants to know what percentage of Canadian university students are receiving financial aid their first year in university. Sally attends a small university with a large percentage of students who commute to campus every day. Sally stands outside of the residence dining hall one weekday evening and hands out surveys to every third person entering the hall for dinner. Sally's data will be invalid because ________.

• A)she did not use a representative sample
• B)she did not define her population
• C)she did not use random sampling
• D)she did not do a pilot test of her survey

Describe the roles of sodium (Na+), potassium (K+), and other ions in generating action potentials and maintaining the resting membrane potential.

Discuss the importance and function of the sodium-potassium pump in maintaining ion concentration gradients across the neuron's membrane.

Identify the phases of an action potential and factors affecting action potential propagation speed, including myelination.

Explain the mechanisms and significance of the absolute and relative refractory periods in action potential generation.

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Definitions:

P-Toluic Acid

A type of benzoic acid derivative where the methyl group is positioned para to the carboxylic acid group.

Toluene

An aromatic hydrocarbon used as an industrial solvent, known for its benzene ring attached to a methyl group.

Alkenes

Unsaturated hydrocarbons containing at least one carbon-carbon double bond, characterized by the general formula CnH2n.

Propanoic Acid

An organic compound, also known as propionic acid, characterized by a three-carbon straight-chain structure with a carboxylic acid functional group.