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Does a nerve provided impulses for many muscle fibers or just few?
A nerve can stimulate impulses to several muscle fibers. When muscle fibers are grouped they form a single muscle group like the biceps.
What composes the basement membrane and packages organs and includes a gel like matrix with all categories of fibers and many cell types?
Muscle
Twitch muscle fibers are used for prolonged activity and have?
____ twitch muscle fibers are used for prolonged activity and have ___ mitochodria. Slow; many
How are muscle fibers arranged to form a muscle?
Muscle fibers can be arranged into two basic structural patterns, fusiform and pinnate. Most human muscles are fusiform, with the fibers largely arranged parallel along the muscle's longitudinal axis. In many of the larger muscles the fibers are inserted obliquely into the tendon, and this arrangement resembles a feather. The fibers in a pinnate (feather) muscle are shorter than those of a fusiform muscle. The arrangement of pinnate muscle fibers can be single or double, as in muscles of the forearm, or multipinnate, as in the gluteus maximus or deltoid.
What is a motor unit is made up of?
Motor neurons and the muscle fibers they transmit signals toA motor unit is a collection of muscle fibers that contract as a single functional unit when stimulated by an impulse from a motor neuron. The actual size can vary greatly, from many large muscle fibers in the quadriceps muscle group per motor unit to just a few muscle fibers in the muscles of the fingers per motor unit.
How many muscle cells are in a human body?
The human body contains approximately 600 to 700 skeletal muscles, which are made up of millions of muscle cells, or muscle fibers. Estimates suggest there are roughly 250 billion muscle fibers in the body when considering all types of muscle tissue, including skeletal, cardiac, and smooth muscle. The exact number can vary depending on individual factors such as size and fitness level.
How many myosin heavy chain isoforms?
There are several myosin heavy chain isoforms, with over 40 distinct types identified in various species, including humans. These isoforms are classified into different types based on their function and expression in specific muscle fibers, such as slow-twitch and fast-twitch muscles. Myosin heavy chain isoforms play a crucial role in muscle contraction and adaptation to different physiological demands. The exact number can vary between species and muscle types.
When a single neuron sends a strong enough impulse to a muscle that how many muscle fibers does it cause to contract?
When a single neuron sends a strong enough impulse to a muscle, it can cause multiple muscle fibers within that muscle to contract. The specific number of muscle fibers that contract will depend on factors like the size of the motor unit and the intensity of the signal from the neuron.
What are muscle fibers that contains many bundles of cylindrical structure called?
Muscle fibers that contain many bundles of cylindrical structures are called myofibrils. Myofibrils are the contractile units within muscle fibers that are composed of repeating units called sarcomeres. Sarcomeres are responsible for muscle contractions by sliding past each other during the contraction process.
What is the smallest myfibril myofilament muscle fiber or fascicles?
The smallest unit among myofibrils, myofilaments, muscle fibers, and fascicles is the myofilament. Myofilaments are the microscopic protein filaments (actin and myosin) within myofibrils that are responsible for muscle contraction. Myofibrils are bundles of myofilaments, muscle fibers are composed of many myofibrils, and fascicles are groups of muscle fibers.
How many muscle fibers stimulate one somatic motor neuron?
150
What type of muscle is rich in ATP?
Skeletal muscle is rich in ATP as it is the primary energy source for muscle contraction and movement. Skeletal muscle has high energy demands and relies on ATP for fuel during exercise and physical activity.
