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True or false smooth muscle fibers are located in small skeletal muscles?
smooth muscle fibers are located in small skeletal muscle
Would conduction speed of a nerve fiber be the fastest in a large or small myelinated fiber?
The conduction speed of a nerve fiber is fastest in large myelinated fibers. This is because myelin acts as an insulator, allowing for faster propagation of the action potential by saltatory conduction in large fibers compared to small unmyelinated fibers.
What type of sensory receptors are made of very small skeletal muscle fibers?
muscle spindles
What type of sensory receptors are made up of very small skeletal muscle fibers?
muscle spindles
What is the name of small contractile elements of skeletal muscle fiber?
sarcomere
What type of sensory receptors are made up of very small skeletal muscle fiber?
muscle spindles
What is the General organization of a muscle belly?
The muscle belly is the main bulk of the muscle, made up of many layers of tissue surrounded by fascia (sheets of connective tissue running throughout your body). The structure of a muscle, from macro (large) to micro (small) is: 1. muscle belly - a bundle of fascicles 2. fascicle - a bundle of fibers 3. fiber - a muscle cell (bundle of myofibrils) 4. myofibril - a bundle of myofilaments 5. filament - actin & myosin proteins The fascia in the muscle, called deep fascia (as opposed to superficial fascia which lies just beneath the skin) has 3 layers: 1. epimysium - an overcoat of dense connective tissue surrounding the entire muscle 2. perimysium - fibrous connective tissue that surrounds each fascicle (bundle of muscle fibers) 3. endomysium - sheath of connective tissue surrounding each muscle fiber
Describe the structure of cardiac muscle?
unlike the heart muscle, which is an involuntary muscle, the skeletal muscles are voluntary(movement by choice). these muscles rely on joint mobility with the skeletal bones for leverage. this joint mobility exists because of the tendons that attach muscle to bones through connective tissue, and the types of connective tissue depends on the joint connecting the bones
What is defibrillation?
Very rapid contractions or twitching of small muscle fibers in the heart often need to be stopped. A mechanism that does this is called a defibrillator. The act itself is call a defibrillation. Many times the top chambers of the heart go into fibrillation and are not as severe as the ones that occur in the bottom chambers called the ventricles. These must be stopped as quickly as possible.
What happens when you pull or sprain a leg muscle?
Sudden pain that occurs in the calf muscle during activity may be the result of a pulled or torn calf muscle. This is called a calf strain or a calf pull. It occurs when part of the muscles of the lower leg (gastrocnemius or soleus) are stretched beyond their ability to withstand the tension. This stretching can result in small microtears to the muscle fibers or, in a severe injury, a complete rupture of the muscle fibers.
What material is in a tea bag?
They can be paper, silk or plastic. They can be a blend of wood and vegetable fibers. The vegetable fiber is bleached pulp abaca hemp, a small tree grown for its fiber.
Why are skeletal muscle cells multinucleated?
The number of cells depends on how large the muscle is; muscles consist of fiber bundles, which are made up of myofibrils. A sarcomere is one of the segments that the myofibril is divided into. In each fiber bundle there are multinucleate cells, which can extend the length of the skeletal muscle. So, the number of cells in a skeletal muscle depends on the size of the muscle. for example, the number of cells in one of our triceps larger than one of the small muscles in a finger.
