Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 7TY
Which of the following is mismatched?
a. neural groove: spinal cord
b. mesoderm: gastrointestinal tract lining
c. urogenital groove: urethra
d. placenta: chorion and endometrium
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Which of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous system
Which of the following extra-embryonic membranes becomes the embryonic portion of the structure involved in waste and nutrient exchange between the embryo and the mother?
Select one:
A. Amnion
B. York sac
C. Chorion
D. Trophoblast
Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veins
Chapter 21 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 21 - Prob. 1QCCh. 21 - Prob. 2QCCh. 21 -
1. Why does only one sperm fertilize the egg, and...Ch. 21 - Prob. 2CRCh. 21 - Prob. 3CRCh. 21 - Describe the stages of labor and delivery.Ch. 21 - What causes the newborn to take its first breath...Ch. 21 - Prob. 6CRCh. 21 - What causes the onset of puberty (sexual...Ch. 21 - Summarize the three main hypotheses of the causes...
Ch. 21 - Prob. 9CRCh. 21 - Prob. 10CRCh. 21 - Which of the following lists the correct order of...Ch. 21 - Which of the following will result in fraternal...Ch. 21 -
3. Which of the following processes is the first...Ch. 21 - Prob. 4TYCh. 21 - Prob. 5TYCh. 21 - Prob. 6TYCh. 21 -
7. Which of the following is mismatched?
a....Ch. 21 - Prob. 8TYCh. 21 - Prob. 9TYCh. 21 -
10. Which of the following would be detrimental...Ch. 21 - Prob. 11TYCh. 21 - Prob. 12TYCh. 21 - Prob. 13TYCh. 21 - Prob. 14TYCh. 21 - Which hormone plays a critical role both in...Ch. 21 - Prob. 1AWKCh. 21 - Prob. 2AWKCh. 21 - Prob. 3AWKCh. 21 - Each year, it is estimated that over 40,000...Ch. 21 - Prob. 5AWKCh. 21 - Prob. 6AWKCh. 21 - How is it possible that one's life could be...
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- Which of the following statements does NOT describe a function of the placenta? Select one: a. Metabolic wastes move from the fetal blood to the maternal blood. b. Carbon dioxide moves from the fetal blood to the maternal blood. c. Protein and minerals move from the fetal blood to the maternal blood. d. Nutrients and oxygen move from the maternal blood to the fetal blood.arrow_forwardWhich of the following extra-embyonic membranes become the embryonic portion of the structure involved in waste and nutrient exchange between the embryo and the mother? Select one: A. Amnion B. york sac C. Chorion D. Allantoisarrow_forwardChoose which tissue would line the fallopian tubes and function as a "conveyer belt" to help move a fertilized egg towards the uterus. a.stratified squamous epithelium b.ciliated simple columnar epithelium c.simple cuboidal epithelium d.smooth musclearrow_forward
- Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardOdontoblasts are derived from a. Ectoderm b. Endoderm c. Histiocytes d. Undifferentiated mesenchymal cellsarrow_forwardThe mesoderm gives rise to a. structures derived from epidermis, such as hair, feathers, nails, or claws. b. the lining of the digestive tract, pancreas, and liver. c. only the liver. d. the heart, blood vessels, muscle, and bones.arrow_forward
- Identify a characteristic of a fetus in the sixth month of gestation. a. It weighs between 5 and 7 pounds. b. It can open and close its eyes and look in all directions. c. It has fully developed reflex patterns. d. It has a respiratory system that is adequate to survive outside the womb.arrow_forwardWhich of the following statements about gastrulation is correct? A. During gastrulation, the contents of cell nuclei begin to vary so that they can start to perform different fucntions. B. During gastrulation, cells differentiate so that they can start to perform different functions. C. The formation of the endoderm, mesoderm, and ectoderm occurs after gastrulation. D. The formation of the endoderm, mesoderm, and ectoderm occurs before gastrulation.arrow_forwardWhich of the following statements is false? a. Cadherins, but not integrins play a role in gastrulation. b. Gastrulation creates the primary germ layers c. Gastrulation requires cells to change their gene expression. d. Body axes are stabilized (made permanent) during gastrulation.arrow_forward
- A 3-month-old male infant has a swelling in the inguinal area that increases when he cries. This finding is most likely caused by abnormal development of which of the following structures? a. genital tubercle b. labioscrotal swellings c. mesonephric ducts d. paramesonephric ducts e. processus vaginalis f. urogenital folds g. urogenital sinusarrow_forward1 2 3 4 5 6 7 8 A. esophagus B. kidney C. heart D. spleen E. small intestine F. liver G. diaphragm H. lung I. cecum J. stomacharrow_forwardLayer A is called _____X________, and ______Y________ develops from this layer. Select one: a. X Y Ectoderm Nervous system b. X Y Endoderm Nervous system c. X Y Endoderm Lining of the digestive tract d. X Y Ectoderm Lining of the digestive tractarrow_forward
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