Answer:
4.9 ^10_5
Explanation:
the negative sign after the exponent is as a result of the decimal point after the number
Answer:
The answer is B- no muscle tension could be generated
Explanation:
During contraction cross bridges are formed by the myosin thick filaments grabbing on to the actin thin filaments. . The overlap of the thick and thin filaments allows myosin to bind to actin. As more bridges are formed, more myosin will pull on actin and more tension will be produced. Muscle tension is a condition in which the body remains semi-contracted for a longer time, it is caused when muscles contracts and do not release.
However, if the muscles are stretched to a point where the thick and thin filaments no longer overlap there will be no muscle tension generated.
Answer:
Orbicularis oris
Explanation:
Orbicularis oris muscle is present in the lips. These muscles may lie horizontally or vertically with other muscles.
Orbicularis oris is the circular muscle that encircles the mouth. This muscle is also known as kissing muscle. Orbicularis oris muscle originates from the maxillae and mandible and innervated by the facial nerve. This muscle inserts in the lips margin.
Thus, the correct answer is option (B).