Answer:
a. insulation
Explanation:
The myelin sheath provides increased cell isolation (increased membrane resistance) because there are no membrane leakage channels in which there is myelin.
In addition to no membrane leakage channels, there is also virtually no type of membrane channel when there is myelin sheath (eg sodium and potassium pumps), which causes the cell a lower need for protein synthesis, or that is, less energy expenditure.
Answer:
Connective tissue that are found in muscle are of 3 types-Endomysium,Perimysium and epimysium.
Explanation:
Endomysium is called as areolar connective tissue that have nerve and capillaries.
It attaches with epimysium and perimysium and form collagen fibers of tendons.
Perimysium is a sheath of connective tissue that transmit lateral contractile movement.
Epimysium is the layer that is formed by irregular connective tissue .
This layer covers the muscle and provide protection from friction against muscle and bone.
This layer contain fascia and other connective tissue.
Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. Light is refracted when it crosses the interface from air into glass in which it moves more slowly. Since the light speed changes at the interface, the wavelength of the light must change, too. The wavelength decreases as the light enters the medium and the light wave changes direction. We illustrate this concept in Figure 3 by representing incident light as parallel waves with a uniform wavelength . As the light enters the glass the wavelength changes to a smaller value '. Wave "a" passes the air/glass interface and slows down before b, c, or d arrive at the interface. The break in the wave-front intersecting the interface occurs when waves "a" and "b" have entered the glass, slowed down and changed direction. At the next wave-front in the glass, all four waves are now traveling with the same velocity and wavelength
The part is known as Myelin Sheath. It serves to insulate the axon and for the nerve impulses to jump from one node of Ranvier to the other.