Answer:
As the thin filaments slide inward, structures called Z-discs come toward each other and the sarcomere shortens but the lengths of thick and thin filaments do not change. The sliding of the filaments and shortening of the sarcomere cause shortening of the whole muscle fiber and ultimately the entire muscle.
Answer: A. a molecule that reacts specifically with an antibody or immune lymphocyte.
Explanation:
An antigen is a foreign body that enters inside the other host body it initiates an immune response. As a result of action of immune response the antibodies are produced. The antibodies are the proteins which fights against the antigen. The antibodies are produced by the white blood cells or lymphocytes. The antigen can be in the form of chemical agents, pollen, pathogens such as bacteria and viruses.
The role of mitochondria is to supply energy to the cells
Which is which is why the answer is A. The powerhouse of the cell
Mithochondria can transfrom oxygen to generate energy for the cell. For example, brain cells in our brain need a lot of energy to process all the information what we inputted, thats when mitochondria took part.
Answer:
Moving magnetic fields pull and push electrons. Metals such as copper and aluminum have electrons that are loosely held. Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.
Explanation: