ch 9 a&p.docx - Question 1 1 out of 1 points Correct...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Question 1 1 out of 1 points Correct Muscle contraction is caused by Selected Answer: actin filaments sliding past myosin filaments Question 2 1 out of 1 points Correct Given these structures: 1. whole muscle 2. muscle fiber (cell) 3. myofilament 4. myofibril 5. muscle fascicle Choose the arrangement that lists the structures in the correct order from the largest to the smallest. Selected Answer: 1,5,2,4,3 Question 3 0 out of 1 points Incorrect The _____________ is the connective tissue covering around a single muscle fiber. Selected Answer: perimysium Question 4 1 out of 1 points Correct The smallest unit of contraction within the muscle fiber is called the Selected Answer: sarcomere Question 5 2 out of 5 points Partial Credit Describe the role of calcium in the contraction of the sarcomere. Selected Answer: When calcium is released in response to an action potential it causes the cycle of cross-bridge formation, movement and release to begin which causes a contraction. A cross-bridge is where myosis binds to an actin. The role of calcium in a cross-bridge formation is calcium binds to troponin, altering its shape.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern