Answer:
Explanation:
Muscle contraction is stimulated by the movement of an action potential moving along a nerve fiber to the muscles. This event follow some series of process before being stimulated.
1. The impulse arrives at the synapse and travels through the transverse tubules.
2. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4. Tropomyosin molecules bind to exposed active sites, linking actin and myosin.
5. Thin filaments are pulled over the thick filaments.
6. The muscle fiber shortens and contracts.
Just changed and transferred
S phase
M phase (mitosis) is usually followed by cytokinesis. S phase is the period during which DNA replication occurs. The cell grows (more...) The duration of these cell cycle phases varies considerably in different kinds of cells.
Answer:
Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc.
Explanation:
Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks and corn etc are the main sources of carbohydrates. In these foods, carbohydrates are present in large amount which is a quick source of energy for us. The breakdown of carbohydrates starts from the mouth when the food mixes with saliva which contains an enzyme that starts breakdown of carbohydrates into micromolecules is called glucose that can be absorbed by our body for the production of ATP molecules.
