The muscles that contract (during cold or fright), the slanted hair follicle is pulled upright, dimpling the skin surface with goosebumps are called arrector pili muscle.
The arrector pili muscle are tiny muscle that attaches to the base of the hair follicle at one end and to the dermal tissue on the other end. When the body feels cold or fright the body generate heat and the arrector pili muscle contract all at once, that causes goosebumps on the skin.
The arrector pili muscle acts as the thermoregulator. Straight stand hair increases air trapping, so that the heat loss from the body decreases. The arrector pili muscle are mediated by the sympathetic nervous system.
To learn more about sympathetic nervous system here
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First things first, I'd call this a questionnaire rather than a problem but anyways. Your DNA profile is literally your identity, and to have that stored in the medical records would be useful in some other cases besides medical issues. It is like having a copy of your fingerprint in the government's hands. Thus one may find it useful as another way to identify someone when the need occurs. As for purposes such as to be referred for the development of personal medical treatment (I believe you're referring to project CRISPR) , is not as necessary because the way they identify mutated genes or "infected" DNA or cells is by referring it to the normal DNA found in any other cells in your body, and if cells are that easy to access, they do not have the need to keep a medical record just for your DNA sequence along with all your gene codes, especially when you are performing investigations on the same species, humans, who have the same number of chromosomes with the similar genes.
Request: Please mark me as the Brainliest.
The vascular cambium produces secondary phloem and xylem tissue.
<span>Vascular cambium, a plant tissue located between the xylem and the phloem in
the stem of a vascular plant. It is also the source of both secondary xylem growth
and the secondary phloem growth. Vascular
cambium is usually found on dicots and gymnosperms not on monocots which
usually lack secondary growth. It does not transport water, dissolved food or
minerals by plants. </span>
<span>Vascular cambia are cylinders of unspecialized meristem cells which
divide to make new cells which
specialize to form secondary vascular tissues.</span>
