Assignment: Neuromuscular Junction Question
Assignment: Neuromuscular Junction Question
Description
Please use a text entry and write your answers in the blank area. Please use a different color text when writing in the answers and make sure the questions are also there. Please see the previous page for the procedures.
Chapter 9
Muscular System: Neuromuscular Junction
1.Where Calcium stores in each muscle cell? _________________________
2.Synaptic vesicles in the axon terminal of a motor neuron contain what neurotransmitter? _________________________
3.An action potential in the axon terminal of a motor neuron opens what type of ion channels? _________________________
4.By what means of membrane transport does the neurotransmitter leave the axon terminal? _________________________
5.Binding of neurotransmitter to the receptors on the motor end plate opens what type of ion channels? _________________________
6.Opening of these channels leads to _________________________ of the motor end plate.
7.How is the neurotransmitter removed from the synaptic cleft?
8.As a result of question 6, an action potential is propagated along the sarcolemma of the muscle cell and down the _________________________ into the cell.
9.The result of this action potential releases what ion from the terminal cisternae of the SR? _________________________
Muscular System: Sliding Filament Theory
1.a. The thick filament is composed of what molecule? _________________________
b. Flexing the head of this molecule provides what is known as the _________________________.
2.The myosin head contains binding sites for what two molecules?
1.
2.
3.Three molecules make up the thin filament.
a. Which molecule has a binding site for myosin heads? _____________________
b. Which molecule covers this binding site? __________________________________________
c. Which molecule has a binding site for calcium ions? ______________________________
4.What molecule must bind to the myosin head in order for it to disconnect with actin? _________________________
5.Breaking down of ATP or ___________of the ATP returns the myosin molecule to the high energy conformation.
6.Binding of the __________heads sequentially prevents backsliding of the thin filament.
7.Name three roles for ATP in the contraction of muscle.
1. _________________________
2. _________________________
3. _________________________
8.What molecule is connected to the Z line? __________________________________
9.Which of the following shorten during contraction? (may be more than one)
a. thin filament
b. sarcomere
c. SR
d. thick filament
Muscular System: Contraction of Motor Units
1.Define a motor neuron: _______________________________________________________________________________________________________________________________________________ _________
2.Define a motor unit: __________________________________________________________________________________________________________________________________________________________
3.The synapse between a motor neuron and the muscle it innervates is called a/an __________________________.
4. The stimulation of additional motor units will increase the strength of the contraction. This process is called _______________________.
5.The muscles of the eye need to make precise small motor movements. Therefore, you would find________ (large or small) motor units in the eye.The muscles of the thigh exhibit gross movements for walking. Therefore, you would find_______ (large or small) motor units in the thigh.
6.a. How is muscle tone maintained in the muscle? ____________________________________________________________________________________________________________________
b. If the nerve to a muscle is cut, what will happen to the muscle? _______________________________________________________________________________________________________ ___________
Muscular System: Contraction of Whole Muscle
1.Which of the following contract in an all-or-none fashion?
a. whole muscle
b. single muscle fiber
2.The development of tension in a muscle, in response to a stimulus above threshold, is called a/an _______________________________.
3.Identify the three phases of a muscle twitch from the following definitions:
1. Sarcomeres shorten _______________________________
2. Sarcomeres return to resting length _______________________________
3. Sarcomeres at resting length _______________________________
4.a. Summation results from: _________________________________________________________________________________________________________________________________________
b. In summation, you must __________ (Increase or decrease)the time interval between stimuli.
5.Below is a list related to summation. Put them in the correct order and describe each
stage.
| Order | Stage | Description |
| Fatigue | ||
| Incomplete tetanus | ||
| Treppe | ||
| Complete tetanus |
6.In the Motor Unit related section, how many motor units (many or few) were required to lift the weights when:
a. the weight is very heavy (~50 lbs)? ______________________
b. the weight was (~20 lbs)? _______________________
Important information for writing discussion questions and participation
Welcome to class
Hello class and welcome to the class and I will be your instructor for this course. This is a -week course and requires a lot of time commitment, organization, and a high level of dedication. Please use the class syllabus to guide you through all the assignments required for the course. I have also attached the classroom policies to this announcement to know your expectations for this course. Please review this document carefully and ask me any questions if you do. You could email me at any time or send me a message via the “message” icon in halo if you need to contact me. I check my email regularly, so you should get a response within 24 hours. If you have not heard from me within 24 hours and need to contact me urgently, please send a follow up text to
I strongly encourage that you do not wait until the very last minute to complete your assignments. Your assignments in weeks 4 and 5 require early planning as you would need to present a teaching plan and interview a community health provider. I advise you look at the requirements for these assignments at the beginning of the course and plan accordingly. I have posted the YouTube link that explains all the class assignments in detail. It is required that you watch this 32-minute video as the assignments from week 3 through 5 require that you follow the instructions to the letter to succeed. Failure to complete these assignments according to instructions might lead to a zero. After watching the video, please schedule a one-on-one with me to discuss your topic for your project by the second week of class. Use this link to schedule a 15-minute session. Please, call me at the time of your appointment on my number. Please note that I will NOT call you.
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If you think you would be needing accommodations due to any reasons, please contact the appropriate department to request accommodations.
Plagiarism is highly prohibited. Please ensure you are citing your sources correctly using APA 7th edition. All assignments including discussion posts should be formatted in APA with the appropriate spacing, font, margin, and indents. Any papers not well formatted would be returned back to you, hence, I advise you review APA formatting style. I have attached a sample paper in APA format and will also post sample discussion responses in subsequent announcements.
Your initial discussion post should be a minimum of 200 words and response posts should be a minimum of 150 words. Be advised that I grade based on quality and not necessarily the number of words you post. A minimum of TWO references should be used for your initial post. For your response post, you do not need references as personal experiences would count as response posts. If you however cite anything from the literature for your response post, it is required that you cite your reference. You should include a minimum of THREE references for papers in this course. Please note that references should be no more than 5 years old except recommended as a resource for the class. Furthermore, for each discussion board question, you need ONE initial substantive response and TWO substantive responses to either your classmates or your instructor for a total of THREE responses. There are TWO discussion questions each week, hence, you need a total minimum of SIX discussion posts for each week. I usually post a discussion question each week. You could also respond to these as it would count towards your required SIX discussion posts for the week.
I understand this is a lot of information to cover in 5 weeks, however, the Bible says in Philippians 4:13 that we can do all things through Christ that strengthens us. Even in times like this, we are encouraged by God’s word that we have that ability in us to succeed with His strength. I pray that each and every one of you receives strength for this course and life generally as we navigate through this pandemic that is shaking our world today. Relax and enjoy the course!
Hi Class,
Please read through the following information on writing a Discussion question response and participation posts.
Contact me if you have any questions.
Important information on Writing a Discussion Question
- Your response needs to be a minimum of 150 words (not including your list of references)
- There needs to be at least TWO references with ONE being a peer reviewed professional journal article.
- Include in-text citations in your response
- Do not include quotes—instead summarize and paraphrase the information
- Follow APA-7th edition
- Points will be deducted if the above is not followed
Participation –replies to your classmates or instructor
- A minimum of 6 responses per week, on at least 3 days of the week.
- Each response needs at least ONE reference with citations—best if it is a peer reviewed journal article
- Each response needs to be at least 75 words in length (does not include your list of references)
- Responses need to be substantive by bringing information to the discussion or further enhance the discussion. Responses of “I agree” or “great post” does not count for the word count.
- Follow APA 7th edition
- Points will be deducted if the above is not followed
- Remember to use and follow APA-7th edition for all weekly assignments, discussion questions, and participation points.
- Here are some helpful links
- The is a great resource


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