Muscle Skeletal Muscle

NAME LAB TIME/DATE _ Microscopic Anatomy and Organization of Skeletal Muscle Skeletal Muscle Cells and Their Packaging into Muscles

1. Use the items in the key to correctly identify the structures described below. g; perimysium c; fascicle Key: a. b. c. endomysium epimysium fascicle fiber myofibril myofilament perimysium sarcolemma sarcomere sarcoplasm tendon 1. 2. 3. 4. 5. 6. 7. connective tissue ensheathing a bundle of muscle cells bundle of muscle cells contractile unit of muscle ; sarcomere d; fiber a; endomysium h; sarcolemma e; myofibril d. a muscle cell thin reticular connective tissue surrounding each muscle cell plasma membrane of the muscle fiber a long filamentous organelle with a banded appearance found within muscle cells actin- or myosin-containing structure e. f. g. h. 1. f; myofilament 8. 9. j. k. k; tendon cord of collagen fibers that attaches a muscle to a bone

2. List three reasons why the connective tissue wrappings of skeletal muscle are important.

The connective tissue wrappings (a) bundle the muscle fibers together, increasing coordination of their activity; (b) add strength to the muscle; and (c) provide a route for entry and exit of blood vessels and nerves to the muscle fibers.

3. Why are there more indirect-that is, tendinous-muscle attachments to bone than there are direct attachments? They conserve space (less bulky than fleshy muscle attachments) and are more durable than muscle tissue where bony prominences must be pned.

4. How does an aponeurosis differ from a tendon structurally? tendon is a band or cord of the same tissue. An aponeurosis is a sheet of white fibrous connective tissue; The diagram illustrates a small portion of several myofibrils. Using letters from the key, correctly identify each structure indicated by a leader line or a bracket. Key: a. b. c. A band actin filament I band d. e. f. myosin filament T tubule terminal cisterna g. h. i. triad sarcomere Z disc . On the following figure, label a blood vessel, endomysium, epimysium, a fascicle, a muscle cell, perimysium, and the tendon. Perimysium Tendon Epimysium Fascicle 90 Review Sheet 14 r>. The Neuromuscular Junction

7. Complete the following statements: The junction between a motor neuron’s axon and the muscle cell membrane is called a neurornuseular junction or a _1_ junction. A motor neuron and all of the skeletal muscle cells it stimulates is called a _2_. The actual gap between the axon terminal and the muscle cell is called a _3_.

Within the axon terminal are many small vesicles containing a neurotransmitter substance called_4_. When the _5_ reaches the ends of the axon, the neurotransmitter is released and diffuses to the muscle cell membrane to combine with receptors there. The combining of the neurotransmitter with the muscle membrane receptors causes the membrane to become permeable to both sodium and potassium. The greater influx of sodium ions results in _6_ of the membrane. Then contraction of the muscle cell occurs. 1. 2. 3. 4. 5. 6. yoneural motor unit synaptic cleft acetylcholine nerve impulse (action potential) depolarization 8. The events that occur at a neuromuscular junction are depicted below. Identify by labeling every structure provided with a leader line. Key: a. b. a e c. d. e. Nucleus axon terminal mitochondrion muscle fiber myelinated axon sarcolemma synaptic cleft synaptic vesicle T tubule f. c g. h. (a) g————-, b——–… f———, Junctional—R:: folds of the sarcolemma h -+—–. :r-! -I Part of a myofibril (b) Review Sheet 14 91

Calculate the price
Make an order in advance and get the best price
Pages (550 words)
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Upload your instructions
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with MyHomeworkGeeks
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Thank you!
Customer 452545, February 6th, 2021
Business and administrative studies
excellent work
Customer 452773, March 9th, 2023
English 101
great summery in terms of the time given. it lacks a bit of clarity but otherwise perfect.
Customer 452747, June 9th, 2021
Love this writer!!! Great work
Customer 452597, April 5th, 2021
thank you so much
Customer 452749, June 10th, 2021
Customer 452591, March 18th, 2021
Business and administrative studies
great job as always
Customer 452773, February 26th, 2023
Business and administrative studies
Excellent job
Customer 452773, March 17th, 2023
Looks great and appreciate the help.
Customer 452675, April 26th, 2021
Social Work and Human Services
Great work I would love to continue working with this writer thought out the 11 week course.
Customer 452667, May 30th, 2021
Impressive writing
Customer 452547, February 6th, 2021
Business and administrative studies
Thank you for your hard work and help
Customer 452773, February 21st, 2023
Customer reviews in total
Current satisfaction rate
3 pages
Average paper length
Customers referred by a friend
15% OFF your first order
Use a coupon FIRST15 and enjoy expert help with any task at the most affordable price.
Claim my 15% OFF Order in Chat

Sometimes it is hard to do all the work on your own

Let us help you get a good grade on your paper. Get professional help and free up your time for more important courses. Let us handle your;

  • Dissertations and Thesis
  • Essays
  • All Assignments

  • Research papers
  • Terms Papers
  • Online Classes