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What refers to one neuron and all skeletal muscle cells it stimulates?
Motor unit
What are the tissues in skeletal muscle?
Skeletal muscle is made up of individual components known as muscle fibers. These fibers are formed from the fusion of developmental myoblasts (a type of embryonic progenitor cell that gives rise to a muscle cell). The myofibers (muscle fiber) are long, cylindrical, multinucleated cells composed of actin and myosinmyofibrils repeated as a sarcomere, the basic functional unit of the cell and responsible for skeletal muscle's striated appearance and forming the basic machinery necessary for muscle contraction. The term muscle refers to multiple bundles of muscle fibers held together by connective tissue. Wikipedia dude ...
Position of muscles?
There are approximately 642 skeletal muscles within the typical human, and almost refers to the action of each muscle from the standard anatomical position.
What does contractile impulse mean?
Contractile impulse refers to the electrical signal that initiates contraction in muscle cells. In cardiac muscle, this impulse originates from the sinoatrial (SA) node, propagating through the heart to coordinate rhythmic contractions. In skeletal muscle, it results from signals transmitted by motor neurons. Overall, contractile impulses are crucial for the effective functioning of both cardiac and skeletal muscles.
Is cardiac muscle mitotic?
It consists of a maximum of 2 nuclei per fiber so no it can't be considered multinucleated. Only skeletal is multinuke.
You control the movement of these muscles what are they?
Voluntary muscles vs involuntary muscles. Generally this refers to striated or skeletal muscles as opposed to the smooth muscle of the intestine or around blood vessels.
What is the difference between myogenic and neurogenic muscle?
Myogenic muscle contractions are initiated by the muscle cells themselves without external neural stimulation, such as in the heart muscle. Neurogenic muscle contractions require neural input to initiate and control muscle activity, such as in skeletal muscles controlled by the somatic nervous system.
Is smooth tissue a muscle tissue?
Smooth tissue refers to a type of tissue that lacks striation and is typically found in organs like blood vessels and the digestive tract. Muscle tissue encompasses three types: skeletal muscle, cardiac muscle, and smooth muscle. Smooth tissue is a specific type of muscle tissue known as smooth muscle tissue.
Insertion of a skeletal muscle?
There are two ends of attachment of skeletal muscle. The "origin", and the "insertion". The "insertion" end refers to the end which is attached to a moveable bone which this muscle will move when it is contracted. The "origin" end is usually the most distal attachment (in appendicular skeleton) this is the bone that the muscle attaches to, and DOES NOT MOVE. Example. Biceps brachii. Origin- connection to the humeral head Insertion- radius/ulna summary- contract your biceps muscle, and your radius and ulna will move. not your shoulder. The end.
Atrophy of skeletal tissue?
Atrophy of skeletal tissue refers to the loss of muscle mass and strength due to lack of use or decreased physical activity. It can also occur as a result of aging, injury, or certain medical conditions. Atrophy can be reversed through physical exercise and rehabilitation programs designed to increase muscle mass and improve functional capacity.
What is the significance of the skeletal muscle fiber triad relationship?
The skeletal muscle fiber triad relationship refers to the structural arrangement of a T-tubule sandwiched between two terminal cisternae of the sarcoplasmic reticulum. This triad structure plays a crucial role in excitation-contraction coupling, as it allows for the transmission of action potentials deep into the muscle fiber to trigger calcium release from the sarcoplasmic reticulum for muscle contraction.
What muscle tissue referred to as the muscular system?
Technically the muscular system refers to all three types of muscle tissues; skeletal, cardiac, and smooth. However, the cardiac and smooth muscles can be considered functional units of other systems as well. In the case of the cardiac muscle it would be the cardiovascular system and in the case of smooth muscle it would most likely be the digestive system. I say most likely because the largest amount of smooth muscle is associated with the digestive system and the gastrointestinal tract, but it is also a part of other systems and organs. Here a a few examples: muscular lining of arterioles in the cardiovascular system and the muscular lining of the urinary bladder in the excretory system.
