Answer:
Some dentists may choose to become dental surgeons or orthodontists. This requires more time in residency, however, more time in medical school is nto required.
Explanation:
Answer:
Gastrulation.
Explanation:
The embryonic development occurs through the different developmental stages like cleavage, morula, blastula and so on. The formation of the germ layers occur in the gastrulation period.
The primitive streak is the structure that develops during the early stages of the gastrulation. As the embryo becomes asymmetric., the cells moves from their initial position and leads to the formation of primitive streak in the gastrulation phase.
Thus, the correct answer is option (C).
Answer:
The absence of estrogen may lead to many symptoms:
- Irregular periods
- Anovulation, and therefore, infertility
- Hot flashes
- Decreased vaginal lubrication, which can lead to painful intercourse
- Depression, because estrogen stimulates serotonin release
- Osteoporosis and bone fractures
- Weight gain
Usually the treatment for low estrogen levels is hormone replacement therapy (orally, vaginally or topically)
YO DIGO B
Espero que esto ayude, porque tuve que traducirlo. T^T
Explanation:
a. Nasal cavity: the epithelium in this zone is meant to provide a physical barrier to the invasion of microorganism or particles, it also secretes and remove mucus and foreign particles, these epithelial cells are also involved in the igE producing process (perpetuating allergic responses. <em>The nose is the first barrier to the air that enters our body, that's why the epithelial cells in this zone focus in filtering foreign particles. </em>
b. Bronchiole: epithelium is ciliated and no ciliated, it becomes cuboidal in smaller passages as it continues to branch. The no ciliated cells, also known as club cells are the ones that produce surfactant. <em>Since bronchioles are passages to direct the air to the alveoles epithelial cells in this zone have adapted to go from larger branches to smaller ones to reach the alveoli. </em>
c. Alveolus: it's composed of two types of cells, type one, that constitute the air-blood barrier and type two, cells that produce surfactant to reduce surface tension to keep the alveolus shape when breathing.<em> Since alveoli's function is to allows oxygen/carbon dioxide to move between bloodstream the epithelial cells in this organ evolved to cover this job.</em>
I hope you find this information useful and interesting! good luck!
