A Univ. of Nev. Strep throat in children generally lasts for about a week (two to seven days). The symptoms can be severe, causing levels of discomfort during swallowing that make a child not want to eat. Other symptoms include redness and white patches in the throat, swollen lymph nodes and fever.
2. chondroblasts-immature cartilage cells. Secrete extracellular matrix, but are not yet rigidly embedded in that matrix. 3. chondrocytes-mature cartilage cells that are embedded in rigid extracellular matrix. These cells reside in small spaces within the matrix that are called lacunae.
Kauferâs lab focused on neural stem cells in the hippocampus of the brains of adult rats under acute or chronic stress. These stem cells were previously thought to mature only into neurons or a type of glial cell called an astrocyte.However, the researchers found that chronic stress made stem cells in the hippocampus mature into another type of glial cell called an oligodendrocyte, which produces the myelin that sheaths nerve cells.hronic stress decreases the number of stem cells that mature into neurons and might provide an explanation for how chronic stress also affects learning and memory, according to the researchers. âUsually the brain doesnât make much oligodendrocytes in adulthood from those neural stem cells,â according to Kaufer.