Dr Turner Forms the Hypothesis That Ingesting Caffeine Prior to an Exam

question 117

Multiple Choice

Dr. Turner forms the hypothesis that ingesting caffeine prior to an exam will improve exam performance. In a study, she gives half of the participants coffee and the other half water. She then gives the participants an exam. In this experiment, what is the experimental group?

• A) The group that drinks water
• B) The performance on the exam
• C) The group that has coffee
• D) There is no experimental group as this is a case study

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Definitions:

Excitatory Postsynaptic Potential

A temporary increase in postsynaptic membrane potential due to the flow of positively charged ions into the postsynaptic cell, making it more likely for the neuron to fire an action potential.

Postsynaptic Neuron

A neuron that receives a signal (via neurotransmitter molecules) from another neuron at a synapse.

Inhibitory Postsynaptic Potential

A decrease in the potential of the postsynaptic neuronal membrane, making it less likely to generate an action potential.

Resting Potential

Resting potential refers to the electric potential difference across the neuronal membrane when the neuron is not actively sending a signal.