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What refers to one neuron and all skeletal muscle cells it stimulates?
Motor unit
When the contraction of a skeletal muscle is studied in the laboratory by applying an electrical charge to the muscle the analysis of the contraction is called a muscle twitch?
A muscle twitch refers to a single, quick contraction and relaxation of a skeletal muscle in response to an electrical stimulus. In a laboratory setting, researchers can analyze the characteristics of the twitch, such as its duration, force, and the time between the stimulus and contraction (latency). This helps in understanding muscle physiology and the mechanisms of muscle contraction.
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 the term power stroke refer to in terms of skeletal muscle?
The term "power stroke" in skeletal muscle refers to the phase of muscle contraction during which the myosin heads pull actin filaments toward the center of the sarcomere. This process occurs after the myosin heads have attached to actin, utilizing ATP to generate force and shorten the muscle fiber. The power stroke is a critical part of the sliding filament theory, which explains how muscle contraction occurs at the molecular level.
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.
What type of muscle is excitable?
Excitable muscle refers primarily to cardiac and skeletal muscle. These types of muscle can respond to stimuli and generate action potentials, allowing for contraction. Smooth muscle also exhibits excitability, but it is less striated and functions involuntarily. Overall, excitable muscles are essential for movement and various physiological processes in the body.
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.
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.
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.
