Created by Jose Tejera
over 5 years ago
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Question | Answer |
A mechanism in skeletal and smooth muscle fibers involves | thin and thick |
Rigor mortis (stiffness in a dead body) occurs because_____________. | No ATP |
Normal bone formation and growth are dependent on the adequate intake of______ | Calcium, Phosphate and Vitamin D |
In a relaxed smooth muscle fiber, the actin active sites are______ and they myosin heads are _________ | Free; non-phosphorylated |
Creatin phosphate functions in the skeletal muscles cells by________ | storing energy |
the mechanism of concentration in smooth muscle is different from skeletal muscle among other things, is that _________ | binds differ |
if a striated muscle were stretched before contraction to the point thick and thin filaments no longer overlapped,________ | no muscle tension could be generated |
Cross bridge cycle in the skeletal muscle fiber is triggered by the increase in the cytosol of ________, flowing from the ___________. | Ca Cations : Terminal cisternae |
Yellow bone marrow contains a large percentage of __________ | adipose tissue (FAT) |
The canal that runs through the osteon is site of | nerves and blood vessels |
in addition to protection, the skin serves other functions, which are... | convert modifide epidermal to a vitamin D |
which of the following is true about smooth muscle contraction? | activates an enzyme that phosphorilates the head of the myosin |
the relation of skeletal muscles fibers depends on the activity of the _____, which decreases the concentration of _______ in the cytosol. | Ca pumps: Ca (cations) |
Hypodermis acts as a shock absorber because | the major part is made of adipose tissue |
Hormone that increases osteoclast activity | Parathyroid hormone |
the tension generated in the skeletal muscle fiber is directly proportional to the number of | cross bridges that may interact with thin myofilaments |
The correct sequence of events muscle contraction? | muscle cell action potential, the release of calcium ions from SR, binding of calcium with troponin ATP- driven power stroke, sliding of myofilaments |
functional role of the T-tubules in skeletal muscle fibers | conduct muscle action |
cells that build boney extracellular matrix | osteoblast |
the lining of the bone marrow cavity | endosteum |
layers of the bone matrix in compact bone | lamellae |
small channels that radiate | canaliculi |
cells that dissolve the bony extracellular matrix | osteoclast |
a motor unit consists of | one neuron and all the skeletal muscles it controls |
melanocytes and keratinocytes work together | accumulate the melanin |
surrounds the individual skeletal muscle fiber and insulates it electrically | Endomysium |
myosin head binding sites for | actin and ATP |
most distinguished characteristic of all types of muscle tissues | transform chemical energy (from ATP) into mechanical energy |
the composition of the secretion of a sweat gland is | 99%water |
the concentration cycle in all muscle types is triggered by the increase of ___________ in the cytosol | Ca(cation) |
structure in skeletal muscle fibers functions in calcium storage | sarcoplasmic reticulum |
which muscle cells have the greatest ability to regenerate? | smooth |
isotonic contraction the muscle | changes in length and moves the "load" |
role of tropomyosin in skeletal muscles | blocking the myosin binding site on the actin molecule |
nutrients reach the surface of the skin through the prosses of | diffusing through the tissue fluid from the blood vessels |
the dermis | Has blood vessels |
not a function of the skeletal system | communication |
which of the following statements is most accurate? | muscle tension is produced by both isotonic contraction and isometric contraction |
select the correct statement regarding factors that affect the tissue repair process | the age of the person is a factor in which the repair process |
what tissues has lacunae, calcium phosphate salts and nerve fibers | bone tissue |
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