Opiates Bind to and Activate Receptor Sites That Are Usually

question 140

Multiple Choice

Opiates bind to and activate receptor sites that are usually activated by ________.

• A)dopamine
• B)endorphins
• C)melatonin
• D)serotonin

---

Definitions:

Power Stroke

The phase in muscle contraction where the head of the myosin molecule pivots, pulling the actin filament inward and shortening the muscle fiber.

Myosin Head

Part of the myosin protein that binds to actin filaments in muscle cells, playing a critical role in muscle contraction.

Actin Myofilament

A thin filament primarily made of the protein actin, playing a crucial role in muscle contraction and cell movement.

Aerobic Exercise

Physical exercise that improves the efficiency of the body's cardiovascular system in absorbing and transporting oxygen.