Watch this video (http://openstaxcollege.org/l/newreflex) to learn more about newborn reflexes.Newborns have a set of reflexes that are expected to havebeen crucial to survival before the modern age. Thesereflexes disappear as the baby grows, as some of themmay be unnecessary as they age. The video demonstrates areflex called the Babinski reflex, in which the foot flexesdorsally and the toes splay out when the sole of the footis lightly scratched. This is normal for newborns, but it isa sign of reduced myelination of the spinal tract in adults.Why would this reflex be a problem for an adult?

Q: B- A-

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Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.