Question

2. Rate of heart beat is reduced by
4 points
0 (a) Adrenaline
(b) Thyroxine
Ο Ο Ο Ο
0 (c) Acetylcholine
O (d) Calcitonin

Answer 1

Answer:

B. Thyroxine

Explanation:

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Answer 2

here is ur answer

Exercise: The easiest and most effective way to achieve a lasting lower heart rate is to do regular exercise. 2. Stay hydrated: When the body is dehydrated, the heart has to work harder to stabilize blood flow. Throughout the day, drink plenty of sugar- and caffeine-free beverages, such as water and herbal tea.