08-MusclesS11b - Muscular system Chapter47/lecture 8 Muscle...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Muscular system Chapter47/lecture 8
Background image of page 1

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

View Full DocumentRight Arrow Icon
Muscle structure Figure 47.10
Background image of page 2
Muscle structure Muscle: fascicles bundled together Fascicle: muscle fibers bundled together Muscle fiber: muscle cell Elongated cell, multiple nuclei Contains numerous bundled myofibrils Myofibrils comprised of thick and thin myofilaments
Background image of page 3

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

View Full DocumentRight Arrow Icon
Structure of myofibrils Myofibril proteins organized in to structures called: sarcomeres ( ) Sarcomeres comprised of: Thin filaments: actin Thick filaments: myosin Actin/myosin interactions produce contraction Troponin ˆ ? ” ¶ Interactions control contraction
Background image of page 4
Sarcomeres ( ) , Sarcomere: area between two Z lines Is the basic subunit of muscle contraction Alternating light and dark bands Light bands (I band) mostly actin Dark bands (A band) mostly myosin
Background image of page 5

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

View Full DocumentRight Arrow Icon
Sliding filament model A muscle contracts and shortens because myofibrils contract and shorten Myofilaments themselves do not shorten Actin slides relative to myosin
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/29/2011 for the course BIO 110 taught by Professor Bos during the Spring '10 term at Purdue University-West Lafayette.

Page1 / 16

08-MusclesS11b - Muscular system Chapter47/lecture 8 Muscle...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online