BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
6th Edition
ISBN: 9781323907634
Author: BELK
Publisher: PEARSON
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Chapter 23, Problem 9LTB
Summary Introduction
Introduction:
After implantation, a finger-like projection appears on the trophoblast called chorionic villi which are surrounded by the endometrium (uterine lining) and maternal blood. The chorionic villi and endometrium (uterine tissue) interdigitate and form a structure and functional unite between the fetus and the mother, which is known as the placenta. The placenta is a structure through which the nutrients and waste material are exchanged between the mother and fetal body.
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What organ does the somatic hypomere originating from the general mesoderm give rise to?
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Chapter 23 Solutions
BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
Ch. 23 - Why can two cells with the same DNA have different...Ch. 23 - Prob. 2LTBCh. 23 - Add labels to the figure that follows, which...Ch. 23 - Prob. 4LTBCh. 23 - Prob. 5LTBCh. 23 - Prob. 6LTBCh. 23 - Which hormone helps prepare the uterus for...Ch. 23 - Prob. 8LTBCh. 23 - Prob. 9LTBCh. 23 - Prob. 10LTB
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- Which female organ has an endometrial lining that will support a developing baby? a. labia minora b. breast c. ovaries d. uterusarrow_forwardIn humans, implantation in the uterus occurs at whichstage of embryonic development?a. zygoteb. morulac. blastocystd. gastrulationarrow_forwardThe placenta function to Select one: A. Produce blood cells B. Provide nutrition for the growing fetus C. Exchange nutrients and wastes D. Creat amniotic fluidarrow_forward
- Which statement is NOT true regarding alcohol consumption during pregnancy? a. The surgeon general states that pregnant women should abstain from alcohol. b. Alcohol crosses the placenta freely and deprives the developing fetus of both nutrients and oxygen. c. Fetal alcohol syndrome cannot be treated, only prevented. d. No harm will result to the infant unless the mother is actually drunk.arrow_forwardWhich of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous systemarrow_forwardDuring which stage of pregnancy will folate supplements lower the incidence of neural tube defects in infants? a. Last trimester of pregnancy b. Second trimester of pregnancy c. Second and third trimesters of pregnancy d. Month before conception through the first trimester of pregnancyarrow_forward
- What would happen if the placenta was not able to fulfill its endocrine function in a pregnantwoman? A. The level of hCG released by the trophoblast would increase B. Mature follicles would not be released by the ovaries C. FSH and LH levels would increase D. The corpus luteum would not be maintainedarrow_forward37. What are the structures? 36. What are the structures? 38. Name the structure. 39. Is this embryo normal or abnormal? Ex answer!arrow_forwardA gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organsarrow_forward
- Which is/are true concerning oviducts? a. the lumen of the oviduct is highly folded b. the oviduct walls contain smooth muscle that promotes the movement of sperm through the oviduct c. the epithelium facing the lumen of the oviduct has cells that are ciliated, and which serve to help move ova, or fertlized ova, to the lumen of the uterus d. secretory cells lining the oviduct produce secretions that kill spermarrow_forwardWhich developmental stage is mismatched? a. second week—implantation b. third week—heart development begins c. fourth and fifth week—limb buds appear d. sixth through eighth week—all organ systems present e. None of these stages are mismatched.arrow_forwardWhen does an embryo become a fetus? Select one: a. When gastrulation forms the three primary germ layers b. When neurulation forms the brain and the spinal cord c. As soon as the heart begins to beat d. When organ formation completesarrow_forward
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