From smallest to largest, the order of the muscle tissue structures are Actin < Myosin < Thin filament < Thin filament < Filament < Sarcomere < Myofibril < Fiber < Fascicles < Muscle .
Muscle tissues is composed of cells which have the unique potential to shorten or settlement that allows you to produce movement of the frame parts. The tissue is particularly mobile and is properly provided with blood vessels.
Motion is the principle function of muscular tissue. they have got the potential to contract and that is what brings approximately the motion of body elements. they also help to preserve frame posture and role. Muscle fibers are placed in walls of hole visceral organs.
Muscle tissues is shaped for the duration of embryonic improvement, in a method called myogenesis. muscular tissues consists of unique contractile proteins called actin and myosin which agreement and loosen up to cause motion. among many other muscle proteins gift are two regulatory proteins, troponin and tropomyosin.
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Complete question:
You will find the image of the skulls in the attached files.
Answer:
1) 2 similarities between each of the skulls might be the presence of the nasal spine, and the interdental space.
2) The size of the skull seems to be the most noticeable change in skull anatomy between the dawn horse and the modern horse.
Explanation:
- Each of the nasal bones in horses ends in a protuberance named "the nasal spine". These spines converge in the distal portion of the bone. These spines and the incisive bone delimitates the space called the naso-incisor notch. In the attached figure you will see the nasal bone in red and the nasal spines. This structure is present in all the skulls in the same position.
- The interdental space is the space left between the front teeth and the back teeth. It is useful to recognize a male from a female in modern horses. This space can be found in all the skulls. You will see it in blue in the image.
The biggest change in skulls between the dawn horse and the modern horse is the size. The skull keeps the original shape or very similar shape but varies in length and height.
Answer:
C. Some bacteria.
Explanation:
Firstly here, nitrates bacteria turn ammonia compounds into nitrites by combining them with oxygen.(Nitrites are chemicals with less oxygen in their molecules than nitrates).
Secondly, nitrate bacteria combine nitrites with more oxygen to form nitrates. By this sequence, nitrogen in proteins is changed into a form which can be absorbed by plant roots. The same series of bacteria also form nitrates out of the nitrogen-containing compounds in animal droppings and urine.
Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.
Myofibrils are the building blocks or contractile unit of each muscle fiber. The tiniest functional unit of skeletal muscle, the sarcomere, is found in the myofibrils and is made up of protein filaments: actin (thin) and myosin (thick).
