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.
Answer:The Rainforest mesocosm, at the north end of Biosphere 2, was created to simulate several tropical Rainforest habitats. The biome can be divided into the following habitats: Bamboo belt of dense bamboo species was intended to screen the biome from airborne salt that might be entrained from the ocean biome.
Explanation: yes
Since due to having the coronavirus, the immune system is already tired of fighting off such a tough disease. Since it's so weak, one small bacteria can make your body react to it in ways you wouldn't think it may, because the immune system isn't working much.
Answer:
Kinetic
Explanation:
The average kinetic energy of the particles in a material is measured by temperature. The overall kinetic energy of the particles in a material is measured by thermal energy. The higher the particle mobility, the higher the temperature and thermal energy of a material.
