Physiology · Muscular System · Hard
Tropomyosin
Meaning: A protein that lies along actin filaments and blocks myosin binding sites when muscle is relaxed.
In practice: When calcium binds troponin, tropomyosin shifts and allows cross-bridges to form.
Quick check
Two questions on related physiology words.
Which word means: The control of heart rate, increased or decreased by nerves, hormones or drugs.
Answer: Chronotropy
Which word means: The process of giving birth; labour and delivery.
Answer: Parturition
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