Chapter 47 - Chapter 47 Effectors How Animals Get Things...

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Chapter 47: Effectors: How Animals Get Things Done I. Types of Muscle a. Skeletal i. Striated ii. Voluntary iii. Breathing b. Smooth i. Involuntary ii. Lines hollow organs iii. ANS c. Cardiac i. Involuntary ii. Heart II. Skeletal a. Cells = muscle fibers i. Many nuclei b. Proteins i. Actin 1. Thin filaments 2. 2 actin monomers in double helix like strand of pearls 3. tropomyosin coiled around it 4. troponin attached to tropomyosin ii. Myosin 1. Thick filaments 2. Wrapped around titin (protein) a. Titin runs full length of sarcomere 3. 2 coiled polypeptide chains w/ large head at end a. heads – ATPase activity i. when bound to actin they can bind/hydrolyze ATP c. Structure i. 1 myosin surrounded by 6 actin ii. 1 actin surrounded by 3 myosin d. Sarcomere i. Overlapping filaments of actin and myosin III. Structure of Muscle a. Myofibrils b. Muscle fibers = bundles of myofibrils c. Bundle of muscle fibers d. Bundle of bundles of muscle fibers IV.Sliding Filament a. Z line – on both sides; anchors actin b. A band – center; myosin c. H zone – place of myosin where actin/myosin don’t overlap
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This note was uploaded on 01/27/2011 for the course BIOSC 0150 taught by Professor Lydiadaniels during the Fall '08 term at Pittsburgh.

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Chapter 47 - Chapter 47 Effectors How Animals Get Things...

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