Answer:
Wool
Explanation:
"The hair of sheep is sheared and processed into wool."
Regulatory proteins control the cell cycle.
If the regulatory proteins are malfunctioning or absent, the cells may reproduce abnormally fast, causing a tumor.
Answer: Option D: Neuromuscular junction
Explanation:
This is the site of transmission of chemical signal also known as a chemical synapse between a neuron and a muscle fibre. Most of the time the chemical released which is a neurotransmitter is acetylcholine. When released, it stimulates the release of calcuim ions present in the sarcoplasm: an endoplasm like structure in the muscle fiber that contains calcium ions.
<span>There are four basic modes of plasma transportation, these include: diffusion, osmosis, facilitated diffusion and active transport. Diffusion, osmosis and facilitated diffusion are passive transport because, their movement through the plasma membrane does not require energy while transportation through active transport requires energy.</span>
