chapter 8
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| muscle responsible for movement - contracts | agonist
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| muscle that stretches | antagonist
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| upper arm | antagonist
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| biceps | antagonist
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| triceps | antagonist
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| assist the agonist muscle by stabilizing the origin bone | synergistic
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| which bands get smaller in a sarcomere | H and I
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| which band does not change size in a sarcomere | A
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| skeletal muscle is made up of | sarcomere
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| thick filament | myosin
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| thin filaments | actin
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| what 2 proteins are attached to actin | tropomysosin & troponin
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| muslce fiber--> myofilaments ---> myofibril --> sarcomere |
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| Each myofibril is made of specialized ER cells called | sarcoplasmic reticulum
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| skeletal muscles= | mutinucleated
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| uniform contraction of muscles are acheived by | T Tubules
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| acetylcholine releases ion channels into the | sarcollemma (membrane wrapping several myofibrils together)
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| muscle cells DO not undergo | mitosis
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| oxygen is stored in muscle cells by | myoglobin
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| type 1 muscle fibers=slow | contain alot of mitochondira and myoglobin
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| Tybe 2 muscle fibers= fast | less resistant to fatigue, no myoglobin, lots of glucose (white under microscope)
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| loss of ATP= | prevent myosin from releasing from actin
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| permanent sequestring of Ca2+ in the SR, would | prevent myosin from binding to actin
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| Cardiac muscle= | striated/ has sarcomeres/ uninucleated
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| skeletal muscle and cardiac muscle grow by | hypertrophy
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| smooth muscle/ cardiac is innervated by | ANS (involuntary)
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| skeletal muscle is innervated by | Somatic (voluntary0
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| Smooth muscle | Dont have sarcomeres, but have thin and thick filaments; has only one nucleus and is NOT striated
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| Smooth muscles are made up of | multi units, single units
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| multi unit | connect directly to neuron
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| single unit | connects to gap junction
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| can contract independantly of other muscles | multi unit
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| intermediate filaments + dense bodies= | smooth muscle
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| osteoclast develop from | monocyte
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| osteoblast from into | osteocyte
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| osteocyte= | exchange waste materials and nutrients within the blood
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| secrete collagen | ostoblast
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| osteoblast,clast,cyte can NOT do? | mitosis
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| spongy bone has | red bone marrow
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| compact is surrounded by MEDULLARY CAVITY IN LONG BONES which contains | yellow bone marrow
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| haversian cannals are made from | osteoclast
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| ca2+ is stored in bone as | hydroxyapetite
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| osteocytes exchange nutrients in lamellae via | cannaculi
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| haversian cannels have | blood, lymph, volkmann's canal
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| lamella+ haversian canal= | Haversian system (osteon)
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| Bone stores | Ca2+ & HPO4 2-
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