February_16thBreathing - o Pivot joint • Muscles: o...

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February 16 th Breathing Breathing o Air inhaled: diaphragm contracts (moves down) o Rib cage expands as rib muscles contract Air Exhaled o Diaphragm relaxes (moves up) o Rib cage gets smaller as rib muscles relax Breathing Regulation o Nerve signals trigger contraction of muscles o Breathing control centers respond to pH of blood o Nerve signals indication CO2 and O2 levels Bones to know: o Radius, ulna, carpals, talsa, sternum, ribs, skull, clavicle, femur, tibia, fibula, patella Birds have hollow bones Living bones: contain lots of proteins (collogen) o Three types of cells: Tissue (maintains bones) Eats up old hard tissue Build new boney structure in bones Bone marror: fills up spongey parts of bones Joints o Hinge joints o Ball and socket (found in shoulder)
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Unformatted text preview: o Pivot joint • Muscles: o Strated (voluntary)-can move intentionally o Smoothe (involuntary) around small intestine o Heart (cardiac) never stops working • Muscles often come in pairs • Biceps and triceps are antagonistic (bicelps contract, trisepts relax, and vice versa) • A muscle cell is a muscle fiber-made up of bundles of fiber inside one muscle are myofibles • Contains several nuclei • Muscles require a lot of ATP (loaded with mitochondria) • Powering element: ATP is used for contraction o Use ATP to attach myosin to actin and move relative to actin • Triggering o Nerve signals gives rise to more calcium in cytoplasm-calcium binds to actin...
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This note was uploaded on 12/21/2011 for the course BIO 202 taught by Professor Brooks during the Fall '11 term at UCSB.

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February_16thBreathing - o Pivot joint • Muscles: o...

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