Raw Materials. Saxophones are primarily made from brass. Brass is a composite alloy made up of metals including copper, tin, nickel, and zinc. The most common type used for instruments is yellow brass which contains 70% copper and 30% zinc. Other types include gold brass and silver brass which have different ratios.
3. Cristae contain enzymes important to ATP production; cristae also increase the surface area for ATP production. e. Lysosomes are membrane-enclosed sacs that contain hydrolytic enzymes, which are important in intracellular digestion, the recycling of a cellâs organic materials and programmed cell death (apoptosis).Lysosomes carry out intracellular digestion in a variety of ways.. Cristae contain enzymes important to ATP production; cristae also increase the surface area for ATP production. e. Lysosomes are membrane-enclosed sacs that contain hydrolytic enzymes, which are important in intracellular digestion, the recycling of a cellâs organic materials and programmed cell death (apoptosis).
When vesicles fuse with the cell membrane in the constitutive pathway, their contents become part of the membrane and it increases in size. This is only temporary because the opposite process, endocytosis, is acting simultaneously to remove parts of the membrane.his is known as the regulatory secretory pathway. In the constitutive pathway, vesicles fuse with the plasma membrane on arrival, but secretory vesicles of the regulatory pathway only do so when the cell receives a signal.