1175 cards
____ is the chief structural unit of compact (cortical) bone.
Osteon is the chief structural unit of ____ bone.
Osteon consist of concentric bone layers called ____.
Osteon consist of c____alled lamellae.
____ consist of concentric bone layers called lamellae.
The ____ surround blood vessels and nerve cells throughout bones and communicate with bone cells through connections called canaliculi .
The haversian canals surround ____ throughout bones and communicate with bone cells through connections called canaliculi .
The haversian canals surround blood vessels and nerve cells throughout bones and communicate with bone cells through connections called ___…
The ____ are small channels that link together the lacunae in bones.
The canaliculi are small channels that link together the ____ in bones.
The canaliculi are ____ that link together the lacunae in bones.
Osteoblasts b____ bone.
____ is a connective tissue that is firm but flexible and connects bones together.
Cartilage is a ____ tissue that is firm but flexible and connects bones together.
Cartilage is a connective tissue that is firm but flexible and connects ____ together.
Cartilage is a____.
____ joints are fused together to form sutures.
Immovable joints are fused together to form ____.
____ joints are strengthened by ligaments and contain a synovial capsule .
Movable joints are strengthened by ____ .
____ fluid lubricates the joints and permits smooth movement.
Synovial fluid ____.
____ is the process of laying down new bone material by cells called osteoblasts .
Ossification is the process of ____ .
____ are the functional units of muscle and are composed of long, fibrous proteins as filaments that slide past each other when a muscle co…
Sarcomeres are the functional units of ____ proteins as filaments that slide past each other when a muscle contracts or relaxes.
Two of the important proteins in a sarcomere are ____, which forms the thin filament.
Two of the important proteins in a sarcomere are myosin, which forms the ____ filament.
Two of the important proteins in a ____ are myosin, which forms the thick filament, and actin, which forms the thin filament.
____in and the two regulate actin-myosin interactions.
Troponin is attached to the protein tropomyosin and the two regulate ____ interactions.
____ define the boundary of each sarcomere.
Z-lines define the ____ of each sarcomere.
The ____ is the middle of a sarcomere.
The M-line is the ____ of a sarcomere.
The ____ is a light band on each side of the Z line comprising a region of the sarcomere where thin (actin) filaments are not overlapped by…
The I-band is a ____e comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments.
The I-band is a light band on each side of the Z line comprising a region of the sarcomere where ____.
The H-zone contains only ____ filaments.
The ____ contains only myosin filaments.
The A-band contains both actin and myosin. It is the only part that ____.
The ____ contains both actin and myosin. It is the only part that maintains a constant size during contraction.
Sarcomeres attached end-to-end to become ____.
____ attached end-to-end to become myofibrils.
Each ____ contains many myofibril s.
Each myocyte contains many ____ s.
The ____ forms a cufflike structure surrounding a myofibril and its main function is to store Ca 2+
The sarcoplasmic reticulum forms a cufflike structure surrounding a ____
The ____ is a cell membrane that encloses each muscle cell.
The sarcolemma is a ____
The sarcolemma maintains a/an m____uch like a neuron does.
The ____ maintains a/an membrane potential much like a neuron does.
____ are extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells.
Transverse tubules (T-tubules) are extensions of the ____ that penetrate into the center of skeletal and cardiac muscle cells.
Transverse tubules (T-tubules) are extensions of the cell membrane that penetrate into the center of ____ muscle cells.
Muscle contraction begins at the neuromuscular junction , where the efferent neuron releases ____ which binds to receptors on the sarcolemm…
Muscle contraction begins at the neuromuscular junction , where the efferent neuron releases acetylcholine which binds to receptors on the…
In muscle contraction, depolarization spreads down the sarcolemma to the T-tubules, triggering the release of ____.
In muscle contraction, depolarization spreads down the ____, triggering the release of Ca 2+ .
During muscle contraction, ____, causing a shift in tropomyosin, causing exposure of the myosin-binding sites on the actin filament.