Primordial germ cells - Samenvattingen, Aantekeningen en Examens

A 43-year-old pregnant woman at 16 weeks of gestation comes to her OB/GYN for a normal examination. During routine blood tests, her serum a-fetoprotein (AFP) concentration is markedly decreased for her gestational age. Which abnormality or condition will the physician need to rule out based upon these low AFP levels? (A) Down syndrome (B) Spina bifi da (C) Anencephaly (D) Multifetal pregnancy (E) Hepatocellular carcinoma (A) Down syndrome A 32-year-old pregnant woman at 30 weeks of...

Test Bank 1-2 Schoenwolf et al.: Larsen's Human Embryology, 5th Edition Chapter 1: Gametogenesis, Fertilization, and First Week Test Bank MULTIPLE CHOICE 1. A child with a large sacrococcygeal teratoma is delivered by cesarean section. The teratoma likely arose from which type of cells? A. Neuroectodermal stem cells B. Neural crest cells C. Primitive streak cells D. Primordial germ cells E. Secondary oocyte cells ANS: D 2. A baby is diagnosed with Down syndrome shortly after birth....

Q001. what is the genital system developed from? - A001. mesoderm Q002. what portion of the embryo gives rise to the reproductive system? - A002. Urogenital ridges Q003. what portion of the ovary contains the developing follicles? - A003. cortex Q004. what is the first indication of the sex in the embryo? - A004. formation of the tunica albuginea Q005. the primordial germ cells can be identified during the 4th week of development where? - A005. Yolk sac Q006. Embryo:; what results followin...

Biology 30 (Alberta) - Reproduction and Embryology Latest 2023 Graded A+ Kidney Filters blood of impurities (eg. Urea) and produces urine. Ureter Transports urine to the bladder for storage. Bladder Stores urine. Urethra Common duct for the excretion of urine and semen from ejaculation. Testes Produces sperm under the influence of FSH and testosterone under the influence of LH. Epididymis Involved in sperm maturation (first 2/3rd's) - last 3rd is involved in mature sperm storage. Prostate...

millimeter (mm) - Answer 10^-3 micrometer (um) - Answer 10^-6 nanometer - Answer 10^-9 Microbes - Answer Organisms and acellular agents too small to be seen by the unaided eye Robert Hooke - Answer made first compound microscope, coined the term "cell" Antoine van Leeuwenhoek - Answer built single-lens magnifier, first to observe single-felled microbes Francesco Redi - Answer meat and maggots research, disproved theory that microbes spontaneously generated Lazzaro Spallanz...

True or false: During luteal regression in the ewe, PGF2α is released from the uterine myometrium andbinds to receptors on the corpus luteum - ANSWER-false True or false: An A4 stage spermatogonia has completed meiosis 1 and is about to begin the 2nd meiotic division - ANSWER-False. An A4 stage spermatogonia has not completed meiosis 1 nor has it started meiosis 2. Spermatogonia are the precursor cells for sperm production in the testes. They undergo a series of mitotic divisions to give ris...

What does the Kidney do? - answer-Produces Urine Functions of Kidney - answer-1. Excretion -removal of wastes from body fluids into urine 2. Regulation of Blood -Ions a. control blood Na+ (sodium), K+ (potassium), and Cl- (chloride) levels -ph a. control blood H+ (hydrogen) and HCO3- (bicarbonate) levels -Pressure and Volume a. control blood fluid volume and therefore blood pressure What three processes do the Kidneys use to perform their functions? - answer--Filtra...

Test Bank for Genetics A Conceptual Approach 7th Edition by Pierce Test Bank for Chapter 1: Introduction to Genetics Multiple Choice Questions 1. Which one of the following pairings between the subdiscipline of genetics and the phenomenon is incorrect? a. Evolution—Population genetics b. Gene regulation—Molecular genetics c. Allelic frequency alteration—Population genetics d. Arrangement of genes on chromosome—Transmission genetics e. Chemical nature of the gene—Transmission ...

Gross anatomy of the kidney: which of these is also considered to be a part of the ureter? - answer-renal pelvis Which of these is confined to the renal medulla and is NOT in the renal cortex? - answer-long loops of the nephron In the first-in-the-balloon demonstration in lecture, which part of the kidney's filtration barrier was represented by the part of the yellow balloon that was touching Dr. Mallatt's fingers? - answer-podocytes with their filtration-slit diaphragms Molecules tha...

The bronchial tree develops by week ____ of intrauterine life. 16 After birth the alveoli develop in increasing numbers until the age of __ __________ and increase in size until growth of the chest wall is finished. 8 years How many alveoli does the full-term infant have? How many will she add? How much will the alveolar survace increase in this time? 50 million, 250 million, 3 to 70 m2 How many different cell types are found in the lungs? More than 40 Name the fi...