B because it is constricted vessel that has the highest blood volume or pressure.
The generator pulse of magnetism
The benefits of stem cell research are associated with the development of specialized cell lines.
<h3>What are stem cells?</h3>
Stem cells are pluripotent cells that can be used to develop virtually any type of specialized cellular type.
These cells (stem cells) have the ability to self-renew and thus generate germinal layers present in an embryo.
Stem cells are used in research to investigate how certain gene expression patterns determine the formation of certain cellular types.
Learn more about stem cells here:
brainly.com/question/18243320
<em>B. Nucleus</em>
Explanation:
The nucleus would be classified as the control center for the cell. Only eukaryotic cells will contain a nucleus and they are surrounded by cytoplasm.
In the cell, a nucleus is very important to have. One of the most important jobs of the nucleus is the holding of genetic material. Genetic material can be either RNA or DNA, but in this case it is DNA. The nucleus holds DNA, which is obviously very important as it stores genes and heredity information.
The nucleus controls all of the important functions of a cell.
<span>The primary excitatory neurotransmitter in the brain and spinal cord is Glutamate. Glutamate is an amino acid that is responsible for binding receptors in the central nervous system and is found at almost all synapses. It helps transmit signals across the synapses.</span>