Biological Approach

Chemical messengers

Section A Model Answer

Question

Describe the role of Chemical Messengers (Hormones/Pheromones) with reference to one behavior. [4]

Model Answer

Hormones are chemical messengers secreted by glands in the endocrine system directly into the bloodstream. Unlike neurotransmitters, which signal across synapses, hormones act over longer distances and produce slower, more long-lasting effects. One such hormone is oxytocin, produced in the hypothalamus and released by the pituitary gland. It acts as a biological trigger or mediator for complex social behaviors, including trust, empathy, and bonding. A specific example of this is the role of oxytocin in parental bonding. Research has found that when parents interact with their infants, measuring salivary oxytocin levels reveals a significant increase that correlates with affectionate touch and biobehavioral synchrony. High levels of this hormone are associated with increased caregiving behaviors and emotional attachment. This demonstrates how oxytocin influences parental bonding behavior, supporting the biological approach's claim that hormones regulate complex social interactions.

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Section B Model Answer

Scenario

The Master Scenario: "The Workspace Study" A university department designs a new "collaborative innovation hub" to improve student performance. The room features open seating, bright lighting, and digital whiteboards. Researchers observe that when students work in this specific environment, their problem-solving speed increases by 20%. However, they also notice that students from different cultural backgrounds use the space differently, and those who feel "out of place" in the high-tech setting often perform worse than they did in traditional libraries.

Question

Explain how chemical messengers could influence student behavior in the new workspace scenario. [6]

Model Answer

Chemical messengers are substances—including hormones, neurotransmitters, and pheromones—that transmit signals between cells to regulate physiological and behavioral responses. In this scenario, the high-tech environment acts as a stressor for some students, triggering the adrenal glands to release cortisol into the bloodstream. Elevated cortisol binds to glucocorticoid receptors in the prefrontal cortex, which is associated with the suppression of synaptic activity and impaired working memory. This explicitly demonstrates how chemical messengers influence behavior, as the physiological release of cortisol provides a biological mechanism for why students who feel "out of place" experience a performance decrease.

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Overview

Section A vs Section B: Key Differences

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Section A

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Section B

How to Write the Perfect Section B Response (6 marks)

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