1. Myofibrils/Muscle fibers are,1. Sacromere.2. Protein.3. Cell.4. Contractile unit.5. 1 & 2 are correct.

2. During the muscle contraction which wil be not happen,1. Myosin bind with actin.2. Myosin tilt the actin towards the m-line.3. Muscle shorten.4. Muscle& myofibril shorten.5. Thick & thin filaments shorten.

3. Which of the following is/are true about rigormortis except,1. Cell membranes become leaky after death.2. Ca2+ from sarcoplasmic reticulum accumulate in cytosol.3. Ca2+ bind to troponin & allows cross bridges to form.4. Myosin ATPase activity allows contraction cycle to repeat indefinitely.5. Muscle contracts until protiolytic enzymes from lysosomes digest cross bridges.

4. Regarding sarcoplasm,1. Is the ECF surrounding myofibre.2. Is enriched with glycogen.

5. Regarding muscle tissue,1. Muscle tone is produced by voluntary contraction of muscle.2. Relaxin affect smooth muscle co-attraction.

1) Regarding deep fascia,a) Composed of loose(areolar) connective tissue.b) Found between the muscles & the skin.c) Hold the muscle with similar function together.d) Limits the movement of the muscle.e) Block the penetration of nerves &blood vessels into muscles.

2) Regarding muscular atrophy,a) Muscle mass increase due to myofibril increase.b) Muscle mass decrease due to myofibril decrease.c) Occur due to over use.d) All are reversible.e) Decay is greater than the replacement of the problem.

3) Regarding tendon,a) Extensible.b) Attach muscles to bones.c) Bundles of collagen of fibers.d) .e) Collagen has fibroblast arranged in raws with flattened nuclei.

4) Muscular tissues are,a) Destabilizing body pressure.b) Storage of triglyceride.c) Storage of Ca2+.d) Regulate the flow out from urinary bladder & stomach.