The first one radio signals
They say carrier protein can transport ions and moecules passtively or using secondary active transport
A HeLa cell splitting into two new cells. In 1951, Henrietta Lacks, a poor woman with a middle-school education, made one of the greatest medical contributions ever. Her cells, taken from a cervical-cancer biopsy, became the first immortal human cell line—the cells reproduce infinitely in a lab.
Answer:
It is important that the daughter cells have a copy of every chromosome, so the process involves copying the chromosomes first and then carefully separating the copies to give each new cell a full set. Before mitosis, the chromosomes are copied.
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People who suffer from attention-deficit/hyperactivity disorder (ADHD) tend to have unusually low levels of dopamine.
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ADHD is a brain disorder characterized by problems in paying attention and excessive activity and it is suggested that lower levels of dopamine (elevated number of dopamine transporters) are associated with symptoms of ADHD. ADHD is associated with functional impairments of dopamine pathways and also norepinephrine pathways because these pathways are responsible for modulating <span>executive function<span> (cognitive control of behaviour).</span></span></span>