Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Biochemical reasoning behind muscle fatigue

20/11/2021 Client: muhammad11 Deadline: 2 Day

Experiment 2: The Neuromuscular Junction

image5.jpgEach skeletal muscle is connected to the nervous system be motor end units. When the neurotransmitter acetylcholine is release at this site, the muscle fiber depolarizes. Calcium ions are released from stores in the sarcoplasmic reticulum. The presence of Ca2+ triggers the ratcheting of actin and myosin filaments and the contraction of the myofiber as all of the myofibrils contract simultaneously.

Materials

Neuromuscular Junction Digital Slide Images Neuromuscular Junction (Longitudinal Section) Digital Slide Images

Procedure

1. Examine the digital slide images of the neuromuscular junction.

image1.png

Neuromuscular junction 100X.

image2.png

Neuromuscular Junction (Longitudinal Section) 1000X.

Post-Lab Questions

1. Identify the axon, terminal branches, and muscle fibers in the slide image below. If possible, trace the fiber to its terminus. image3.jpg

2. Are there few or many nuclei at the end plate?

3. What is a motor unit?

4. How is a greater force generated (in terms or motor unit recruitment)?

5. What types of sensors are present within the muscle to identify how much force is generated?

Experiment 3: Muscle Fatigue

Muscle contractions are essential for muscles to function properly. The inability of a muscle to maintain tension is muscle fatigue. Failure to contract may occur because of the accumulation of lactic acid, a lack of ATP, or decreased blood flow. In this exercise, you will investigate the correlation between repeated movements and muscle fatigue.

image6.jpg

Materials

Rubber Band

Stopwatch

Note: If you suffer from a medical condition that does not permit you to perform this activity, please ask a partner to volunteer for you.

Procedure

1. Hypothesize how many times you can stretch a rubber band between your thumb and pinky finger in 20 seconds. Record your predictions in the table below.

2. Using your dominant hand, count the number of times you can completely stretch a rubber band between the thumb and pinky finger in 20 seconds. Be sure to stretch the rubber band as far as possible each time and do not take a break in between trials.

3. Record your count for each trial in Table 1.

Table 1: Experimental Counts

Trial 1

Trial 2

Trial 3

Trial 4

Trial 5

Predicted Value

Actual Value

Post-Lab Questions

1. How did the predicted results compare to the actual results?

2. Did you notice any changes in the number of repetitions you could perform, or how your hand felt after each of the trials?

3. Explain the actions that were occurring at the cellular level to produce this movement. Include sources of energy and any possible effect of muscle fatigue.

4. Hypothesize what would happen if blood flow was restricted to the hand when this experiment is performed.

Experiment 4: Gross Anatomy of the Muscular System

image7.jpgMuscle actions are often described as a departure of the from the anatomical position of the body. In performing the next exercise, you will understand how muscles act to affect motion.

Materials

*Participant (can be yourself) *Heavy Object (approximately 5 pounds)

*You must provide

Procedure

1. Begin by examining muscles found in the upper limbs. First, extend your forearm so you have a clear view of your hand. What muscle is required to perform this extension? Extend your fingers out so they are straight and splayed apart. Then, retract your fingers into a tight fist. Repeat this motion several times, observing the wrist and hand muscles as the flex and relax. What muscles are used to complete this action? Record your observations in Table 2.

Note: It is helpful to palpate the area being flexed to better identify which muscles are being used.

2. Moving up the limb, extend your forearm out until it is parallel to the ground. Have a partner press down on your forearm. Flex your forearm to provide resistance as your partner pushes down. Observe the forearm and identify which muscles are being used. Record your observations in Table 2.

3. The partner should stop pushing down on your forearm, but keep it extended. Curl the forearm upward, creating a bend at the elbow. Observe which muscles are being used to complete this action, and record your observations in Table 2.

4. Find a heavy object, and pick it up. Keeping your arm straight, raise the object out to the side until it is parallel to the ground. What muscles does this require? Continue holding the object, and extend your arm back behind you. What muscles does this activate? Record your observations in Table 2.

Note: Be sure the heavy object is not too heavy before you lift it. This item should be approximately 5 - 10 pounds. This object should never be raised above your head!

5. Move down to the lower limbs, and determine what motions are needed to view the lower limb muscles in action. For example, you may want to walk, jump, sit, point your toes, etc. Engage at leave seven different muscles and indicate what motion was used to engage each muscle in Table 2.

Table 2: Gross Anatomy Data

Movement

Muscle(s) Activated

Action(s) of Muscle(s)

1. Forearm Extended (Step 1)

2. Fingers Extended and Splayed (Step 1)

3. Fingers Retracted (Step 1)

4. Forearm Pressed Down Upon (Step 2)

5. Elbow Bent (Step 3)

6. Arm Raised to Side with Heavy Object (Step 4)

7. Arm Extended Back with Heavy Object (Step 4)

8. (lower limbs; student selects action…)

9. (lower limbs; student selects action…)

10. (lower limbs; student selects action…)

11. (lower limbs; student selects action…)

12. (lower limbs; student selects action…)

13. (lower limbs; student selects action…)

14. (lower limbs; student selects action…)

Post-Lab Questions

1. Label the human muscle diagram.

image4.jpg

2. Which muscle(s) were used to extend your arm backwards?

3. Which muscle(s) were used to extend and splay your fingers outward?

Experiment 5: ATP and Muscle Fatigue

Muscles require energy to contract. Energy is released when biomolecules such as sugars and fats are broken down, and is stored in the form of ATP. ATP enables muscle contraction, but can only be stored in relatively small amounts. For this reason, the body must continually metabolize new ATP molecules.

image8.jpgMuscle fatigue occurs if the local ATP reservoir for a muscle becomes depleted. This is a common result of strenuous exercise in which ATP is consumed at a faster rate than it is produced. At this point, muscles may fail to contract and the intensity of an exercise must decrease. In this experiment, you will test how long it takes your muscles to fatigue.

Materials Stopwatch *Participant *Sturdy Wall to Stand Against

*You must provide

Procedure

1. To begin, find a wall that is strong enough for you to push against. A temporary wall (such as a partition panel) is not suitable.

2. Find the stopwatch and adjust the settings so it is ready to operate.

3. Stand with your back pressed up against the wall, and lower yourself into a "wall-sit". To do this:

a. Align the backs of your heels, hips, and shoulders with the wall.

b. Keeping your back pressed against the wall, take a few small steps forward (your upper half will lower as you walk your feet out).

c. Lower yourself into a sitting position, keeping your back flat against the wall, until your knees form a 90 degree angle.

d. Steady this position by focusing the majority of your weight in your heels. Do not allow your lower back to pull away from the wall.

4. Start the stopwatch and time how long you are able to hold the wall-sit position. The amount of time will vary, but will likely fall within approximately 30 - 120 seconds. When you are tired, check the time on the stopwatch, and move out of the position by slowly lowering your body down to the floor or standing up.

5. Record how long you were able to hold the wall-sit in Table 3.

6. Allow your muscles to rest for approximately two minutes, reset the stopwatch, and repeat Steps 3 - 5.

7. Again, allow your muscles to rest for approximately two minutes, reset the stopwatch, and repeat Steps 3 - 5. You should have three trials of data.

Table 3: Muscle Fatigue Data

Trial

Time (seconds)

Trial 1

Trial 2

Trial 3

Post-Lab Questions

1. What happened to the time intervals between Trial 1 and Trial 3? What caused this change?

2. Identify three muscles which were engaged during the wall-sit.

3. Explain the biochemical reasoning behind muscle fatigue.

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Fatimah Syeda
Professional Accountant
Instant Homework Helper
Math Specialist
Top Quality Assignments
Engineering Solutions
Writer Writer Name Offer Chat
Fatimah Syeda

ONLINE

Fatimah Syeda

I find your project quite stimulating and related to my profession. I can surely contribute you with your project.

$44 Chat With Writer
Professional Accountant

ONLINE

Professional Accountant

I have assisted scholars, business persons, startups, entrepreneurs, marketers, managers etc in their, pitches, presentations, market research, business plans etc.

$27 Chat With Writer
Instant Homework Helper

ONLINE

Instant Homework Helper

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$23 Chat With Writer
Math Specialist

ONLINE

Math Specialist

Being a Ph.D. in the Business field, I have been doing academic writing for the past 7 years and have a good command over writing research papers, essay, dissertations and all kinds of academic writing and proofreading.

$35 Chat With Writer
Top Quality Assignments

ONLINE

Top Quality Assignments

I am an academic and research writer with having an MBA degree in business and finance. I have written many business reports on several topics and am well aware of all academic referencing styles.

$29 Chat With Writer
Engineering Solutions

ONLINE

Engineering Solutions

I am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message.

$32 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Temperature coefficient of resistance - Recruit select and induct staff assessment answers - Ict university tuition fees - Usanovich concept of acid and base - HS440 Claudia Drath - Society and culture pip guide - Api 20e quick index booklet - Cambridge international as and a level business studies revision guide - Myeclassonline com login - Ruby tuesday code of conduct - The choice edith wharton summary - Week Four Study Guide - Velocity time graph worksheet - Alyeski tours operates day tours of coastal glaciers in alaska - INT Wk 11 DQ 1 - Closing medical practice checklist - Power system analysis and control rmit - The cyclotron mastering physics - Cause and effect essay about eating too much junk food - Specimen handling in the operating room - My flamboyant grandson theme - Emerging trends in organizational development - 4 pole double throw relay - Hard rock cafe operations management in services case study - Karen marley janet bowen - Aqa sociology research methods - Elementary Statistics Quiz - The new colossus emma lazarus analysis - Central highlands library daylesford - Colin palmer african diaspora - Breadth first search gif - Apn professional development plan sample - Features of discursive writing - Ccna 4 chapter 6 - IN ONE 500-WORD POST, RESPOND TO AT LEAST ONE OF THE FOLLOWING QUESTIONS - Action on the IOM Report/ WEEK 5 DISCUSSION - Work life balance for idiots dr ludwig rinehart - Test091720 - Acidified potassium dichromate solution - Nurse esther listens to ms. lieberman's abdomen - How do i make a genogram - Richard hillis heart attack - Borneol h nmr - Ecdis base display information - Animal cell drawing with labels - Shadow health neurological assessment documentation - Molarity model 1 lemonade mixtures - What is a governing board in healthcare - Patrick henry speech analysis - Symbolism in if by rudyard kipling - Delivering healthcare in america a systems approach pdf - Quality Analysis - 6 components of health - Solitary as an oyster analysis - Which of the following is one of the assumptions underlying nonrational models of decision making? - Examples of formative assessment in science - Ways to play beer pong - Visual communication in the media rasmussen - Primary school general knowledge quiz - On january boston enterprises issues bonds - The dog ate my homework and other tales of woe - Voice on dodge ram commercial 2013 - Question & Answer - Blue card traffic control - Brian phillipson sacramento ca verdict - Safe harbor provisions under hipaa - Business Intelligence - Uhf police channels vic - +91-8890675453 love marriage problem solution IN Durg - Paper - CRIM J 3 - Nursing care plan for vomiting - Repaso completa el siguiente resumen gramatical - 01928 area code uk - Stop your divorce homer mcdonald amazon - Tastyworks day trade counter - Environmental impact paper - Enterprice Risk Management - Rei employee login snaplink - Examples of developmentally appropriate practice for toddlers - What were the most compelling topics learned in this course - George bernard shaw realism - Alternative questions grammar exercises - Baker mfg inc wishes to compare - How to make ochre paint - Assignment: Family Suicide Risk Intervention Plan-WK4/6411 - Homework help - Assignment: Kingdon: Agendas, Alternatives, and Public Policies-6361-wk5Ass - How to date a browngirl by junot diaz summary - Electric field at centre of ring - Oceanview marine company 20 4 - Blunt end topo cloning - Old catton junior school - Science write up template - Psychology final project - Kin boutique by cong tri - 1 2 7z 4 1 5 5z 15 - Discussion Question - Castor oil packs for breast cancer - Safe current limits for electromedical apparatus