Answer:A. The release of calcium ions causes myosin and actin to attach to each other.
The contraction of skeletal muscles takes place by induction of a nerve impulse, which produces a movement and the interaction of the filaments containing proteins named as actin and myosin. This interaction of filaments is regulated by proteins called tropomyosin and troponin present on the actin filaments. The motor nerve causes the depolarization of the muscle membrane sarcolemma. This triggers the sarcoplasmic reticulum to release calcium ions. This calcium binds to troponin and thus allows the tropomyosine strand on the actin filament to displace so that the part of the actin where myosine head needs to be attached remain uncovered. Binding of the actin myosine filament results in contraction.
Hence, the release of calcium ions causes myosin and actin to attach to each other causes muscle contraction.
The answer is d- <span>psychoneuroimmunology</span>
When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes in biomes at different latitudes.
B, hormones that serve as chemical messengers im not 100% sure though
Answer:the item that has steps involved in glucose oxidation in an aerobic environment is ATP.
CH12O6 + 6O2 + 36Pi^-1 + 36ADP^3- + 35H^+ = 6CO2 + 36ATP^4- + 42H2O
Explanation:
Aerobic oxidation of glucose is coupled to the synthesis of as many as 36 molecules of ATP: Glycolysis, the initial stage of glucose metabolism, takes place in the cytosol and does not involve molecular O2. It produces a small amount of ATP and the three-carbon compound pyruvate.
