anatomy 1

Pregunta	Respuesta
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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