L11 - Physiology PDF Notes - Three muscle types are found(i...

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

View Full Document Right Arrow Icon
Three muscle types are found: ( i ) skeletal muscle, ( ii ) cardiac muscle, and ( iii ) smooth muscle. Skeletal muscles make up approximately 40% of total body weight. Cardiac muscle is found only in the heart, where it helps the heart function as a pulsatile pump, which ensures the movement of blood through the vasculature. Smooth muscle is predominantly found in the internal organs and tubular structures such as in walls of the gastrointestinal tract, urinary bladder, uterus, and blood vessels (but not in the walls of capillaries). The muscles in the body have two important functions: ( i ) to generate force; and ( ii ) to generate motion. A third function of muscle cells (particularly skeletal muscle) is to generate heat through multiple contractions (referred to as shivering thermogenesis ). Muscles perform these functions by converting the chemical enrgy stored in the high-energy phosphate bonds of ATP to either mechanical energy (force generation or movement) or heat (shivering thermogenesis).
Image of page 1

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

View Full Document Right Arrow Icon
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