Which of the following is correct about a muscle contraction? A.Sarcomeres produce actin and myosin. B.(Correct Response) Myosin heads attach to sites on actin filaments. C.Myofibrils attach to Z lines. D. ATP causes fascicles to contract muscle fibers.
Which structure is composed of the filaments actin and myosin? A.fascicle B.(Correct Response) myofibril C.muscle fiber D.sarcomere
Which statement is correct about how muscles move bones? A. The origin is where only flexors attach to move a nearby bone. B. Extensors cause a bone to move initially. C. Tendons connect extensors and flexors to each other. D. (Correct Answer) The insertion is where a muscle attaches to the bone it wants to move.
Since the male and the female have recessive alleles of this gene, all of their offspring will be like that too. rr x rr cross will result in 100% of the offspring with the genotype: rr
R- dominant (but none of the parents has this allele) r- recessive
