It reduces hearing and it also in creases stamina
Answer:
Brittany is a 15-year-old freshman in high school. She is the oldest child in asingle parent family. She enjoys sports and participates in volleyball,basketball, track, and softball at school. Her usual day consists of breakfastat home, which is usually a pop-tart on the way out of the house. Lunch is afast food meal with friends that often consists of a double cheeseburger,fries, and large regular soda pop after which she often feels stuffed andbloated, but feels she needs the calories for her busy sports schedule. Shethen doesn’t eat again until later in the evening even if she is hungry afterschool. Supper is either a hot dog or pop at ball games or left-over food inthe refrigerator after she gets home from practice. She doesn’t care muchfor fruits and vegetables other than bananas, corn and lettuce salad, as her
Explanation:
Epithelial tissues undergo turn-over throughout adult life: cells die and are replaced. Consequently,most if not all epithelia contain stem cells that
<span>(i) are competent for cell division, </span>
<span>(ii) self renew:regeneration of a "mother" stem cell with each division, and </span>
(iii) produce differentiated cell types specific to each epithelia.
-Stem cells produce differentiated cell types by cell division coupled with specific pathways of cell specification imposed on some of their daughter cells. In most stem cell-tissue systems, cell division and specification goes through several steps. Many stem cells produce daughters that also proliferate themselves (undergo cell division cycles), often at faster rates; these transitional intermediates are called transit amplifying cells. These transit amplifying cells then produce differentiated cells, either directly or through several steps of specification. At each step,specific changes in protein expression patterns and activities occur.
-Stem cell in gland crypt bottom (tightly control stem cell, have to divide longutdinal)
<span>-Stem cell in skin basal lamina (divide in apical direction (change in phenotype) form squamous layer at apical, highly control (reactivate/reuse), secrete ligand that core signaling molecule (WINKS) in early develop than reuse and reactivate for stem cell in skin... also use in cancer cell (lost of control=tumor))</span>
