Answer:
The muscle fibers are pulled by the myosin and sarcomere together, resulting in the shortening of the fibres, but the sarcomere and myosin just move.
Explanation:
During muscle contraction, each sarcomere shortens, bringing the Z discs close together. There is no change in the width of the A band but both I bands and the H zone almost completely disappear. These changes are explained by actin and myosin filaments sliding past one another, so that the actin filaments move into A band and H zone. Muscle contraction thus results from an interaction between the actin and the mosin filaments that generates their movement relative to one another. The molecular basis for this interaction is the binding of the myosin to actin filaments that generate their movement relative to one another.
It can honestly be all of the above ..
Relationships Between Organisms:
Species interact every day. That interaction is a vital part of how organisms develop and change over time. When you study species, it is important to watch the way they interact with their surroundings.
Answer:
D. maintenance of blood glucose levels
Explanation:
The primary function of the urinary system is to get rid of metabolic waste. The metabolic waste is excreted out of the body in the form of urine. Glucose is not part of the urine of a normal human with no medical conditions. Glucose is reabsorbed during tubular re-absorption and is sent back to the blood.
Antagonistic effects of insulin and glucagon maintain blood glucose levels. Urinary system does not perform this function.