Exam (elaborations)
PSYCH 439 - Chapter 3 Questions And Answers Latest Update
- Course
- PSYCH 439
- Institution
- Texas A&M University
PSYCH 439 - Chapter 3 Questions And Answers Latest Update
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Solution 2024/2025Pepper
PSYCH 439 - Chapter 3 Questions And Answers
Latest Update
how many neurons in human brain ANS✔✔ 100 billion
at its peak, a fetus can generate ____ new neurons per minute ANS✔✔
250,000
most neurogenesis occurs during _____, but some cells are added into
adulthood ANS✔✔ development
pleiotropy ANS✔✔ when one gene affects many traits
ex: Shh affecting floor plate, motor nuerons, eye cups
redundancy ANS✔✔ when many genes participate in a single process, and
when loss of one of the genes has little effect but knocking out 2 genes =
cannot be carried out
ex: nog, chrdn, foll ---> neural plate differentiation
mitosis ANS✔✔ process of cell division in which both resulting cells receive a
full complement of genetic material
restricted number of locations and time period
, Solution 2024/2025
Pepper
well established pattern, some cells divide many times and others leave to
take on fates
ventricular surface
neuroblasts ANS✔✔ divide and generate new cells
- symmetric = 2 neuroblasts
- asymmetric = 1 neuroblast and 1 postmitotic daughter cell that leave
ventricular zone in neural tube
neurogenesis ANS✔✔ process of dividing to produce cells that differentiate
into neurons
in mitosis, cell nuclei shuffle from ____ to _____ ANS✔✔ ventricular zone
pial surface
marginal zone ANS✔✔ attached to pial surface, getting pushed higher and
higher
asymmetric ANS✔✔ m phase in ventricular zone
radial glial cells
symmetric ANS✔✔ m phase in subventricular zone
radio-labeled thymidine ANS✔✔ birthdating cells
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