In humans and many other mammals, new neurons are created mainly before birth, and the infant brain contains substantially more neurons than the adult brain. There are, however, a few areas where new neurons continue to be generated throughout life. The two areas for which adult neurogenesis is well established are the olfactory bulb, which is involved in the sense of smell, and the dentate gyrus of the hippocampus, where there is evidence that the new neurons play a role in storing newly acquired memories. With these exceptions, however, the set of neurons that is present in early childhood is the set that is present for life. Glial cells are different: as with most types of cells in the body, they are generated throughout the lifespan. COUNT 5
QSN1 The infant brain contains more of what type of cells in the brain than the adult brain? ANS1 neurons QSN2 The olfactory bulb is related to what sense? ANS2 sense of smell QSN3 What area of the hippocampus plays a role in storing new memories? ANS3 dentate gyrus of the hippocampus QSN4 Which type of cells in the brain are generated throughout your lifetime? ANS4 Glial cells QSN5 Neurogenesis is the process of what? ANS5 neurons continue to be generated throughout life