The Muscular System: Skeletal Muscle Tissue Fill in the characteristics of the t

Question

The Muscular System: Skeletal Muscle Tissue Fill in the characteristics of the three muscle types: Muscle Type Shape of cell W of nuclei Striations Control vesen ricent 2. What ataches muscles to bone? 3- 4. endoplasmic reticulum in muscle cell intracellular fluid around organelles plasma membrane of muscle cell Myofibrils consist of contractile filaments. Name the two types and what proteins they are composed of: The whole muscle is composed of muscle cells (fibers) grouped in bundles called Match the following three terms with their definitions: Sarcolemma Sarcoplasmic reticulum Cytosol 5. composed of composed of 6. What happens to these areas during contraction? Z line (disc) H zone 7. Organization of muscle. Put the following components in order, from smallest to largest: fascicle myofibril myofilament muscle muscle fiber (cell) The Muscular System: Neuromuscular Junction I. Synaptic vesicles in the axon terminal of a motor neuron contain what

Explanation / Answer

2. tendon

3. fasciculi

4. sarcolemma - plasma membrane of muscle cell

sarcoplasmic reticulum- endoplasmic reticulum in muscle cell

cytosol- intracellular fluid around organelles

5. Actin filaments composed of three proteins as Actin, tropomyosin and troponin.

Myosin filaments consisting of myosin molecule protein.

6.Z lines- It approaches the ends of the myosin filaments or comes closer.

H zone- It is shortened and reduced.

sarcomere- overall contraction due to gliding of actin filaments down between the myosin filaments towards the mid of H zone.

7. muscle fibre (cell) -fascicle -myofilament- myofibril- muscle.

1. neurotransmitter- acetacetylcholine.

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