Science (086) — AI-generated practice question

Two physiological changes when adrenaline is released:

1. Heart beats faster — This supplies more oxygen to the muscles, preparing the body for immediate physical activity like fighting or running.

1. Breathing rate increases — Contractions of the diaphragm and rib muscles increase breathing rate, ensuring more oxygen intake for greater energy release.

Source: Chapter 6, Section 6.3 — Hormones in Animals

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The examiner expects two distinct changes with a brief reason for each. Both points are directly from the passage about adrenaline's effect. Common mistakes: writing only one change, or listing changes without explaining why each helps. Note that blood diversion to skeletal muscles (reduced supply to digestive system/skin) is also valid as a third point if asked. Stick to the textbook's exact language — "heart beats faster," "breathing rate increases" — to score full marks.