Human Anatomy (8th Edition)
8th Edition
ISBN: 9780134243818
Author: Elaine N. Marieb, Patricia Brady Wilhelm, Jon B. Mallatt
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 11RQ
When it is 1.5 months old, an average embryo is the size of (a) a black bean, (b) an adult fist, (c) its mother's nose, (d) the head of a common pin.
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If an egg cell were treated with EDTA, a chemical that bindscalcium and magnesium ions,(A) the acrosomal reaction would be blocked.(B) the fusion of sperm and egg nuclei would be blocked.(C) the fast block to polyspermy would not occur.(D) the fertilization envelope would not form.
From which of the following is the embryo developed?
a) Trophoblasts
b) Blastocoelen
c) The yellow sacks
d) Inner cell mass
Which structure of the amniotic egg compartmentalizes wastes?
a) Chorion
b) Amnion
c) Allantois
d) Yolk sac
Chapter 3 Solutions
Human Anatomy (8th Edition)
Ch. 3 - Dining which prenatal period is the basic body...Ch. 3 - Which abdominal structures form from the inner...Ch. 3 - Using directional terms (Table 1.1), describe the...Ch. 3 - Describe gastrulation. During which week of...Ch. 3 - What structure induces the formation of the neural...Ch. 3 - Which type or types of mesoderm Cluster into...Ch. 3 - After folding takes place, which embryonic germ...Ch. 3 - Does endoderm form the inner Iining of the inner...Ch. 3 - Which part of the somite forms the vertebrae and...Ch. 3 - What does the splanchnic lateral plate mesoderm...
Ch. 3 - A birth defect in the heart is caused by a...Ch. 3 - Why is respiratory distress common in babies born...Ch. 3 - 1ndicate whether each of the following relates to...Ch. 3 - The outer layer of the blastocyst, which attaches...Ch. 3 - Most birth defects can be traced to disruption of...Ch. 3 - The primary germ layer that forms the trunk...Ch. 3 - Each embryonic structure in column B with its...Ch. 3 - Match each date in column B [approximate time...Ch. 3 - It is currently possible to save some premature...Ch. 3 - Somites are evidence of (a) a structure from...Ch. 3 - Which of the following embryonic structures are...Ch. 3 - Prob. 10RQCh. 3 - When it is 1.5 months old, an average embryo is...Ch. 3 - Gastrulation is the (a) formation of three germ...Ch. 3 - The epiblast forms (a) only the ectoderm, (b) the...Ch. 3 - The limbs develop during the (a) start of the...Ch. 3 - The notochord develops primarily from (a)...Ch. 3 - Prob. 16RQCh. 3 - What important event occurs at the primitive...Ch. 3 - What is the function of the amniotic sac and the...Ch. 3 - (a) What is mesenchyme? (b) How does it differ...Ch. 3 - Explain how the flat embryonic disc takes on the...Ch. 3 - In anatomy lab, Thaya pointed to the vertebrae of...Ch. 3 - Neural crest is the one embryonic tissue that is...Ch. 3 - Many embryonic events �rst occur cranially, then...Ch. 3 - Prob. 24RQCh. 3 - Differentiate the outer tube from the inner tube....Ch. 3 - Before Delta studied embryology in her anatomy...Ch. 3 - A friend in your dormitory, a freshman, tells you...Ch. 3 - Insufficient folic acid in the early weeks of...Ch. 3 - Your cat finds a large ball of string and starts...Ch. 3 - When is the earliest time the sex of a fetus can...
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- Which structure is the outermost extra-embryonic membrane? A ) Placenta ‘ B ) Yolk sac D ) Chorionarrow_forwardAt which embryonic event would one be able to first distinguish whether an embryo is diploblastic or triploblastic? A)cleavage B)metamorphosis C)fertilization D)gastrulation E)organogenesisarrow_forwardWhich of the following primary germ layers nervous tissue develops from? a ) yolk sac b) endoderm d) amnin e) ectodermarrow_forward
- Into which structures do the trophoblast cells of the developing embryo, differentiate? a) The developing foetus b) The yolk sac c) The placenta d) The blood vessels e) All of the abovearrow_forwardSomites are evidence of (a) a structure from ectoderm, (b) a structure from endoderm, (c) a structure from lateral plate mesoderm, (d) segmentation in the human body.arrow_forwardThe cortical reaction of sea urchin eggs functionsdirectly in(A) the formation of a fertilization envelope.(B) the production of a fast block to polyspermy.(C) the generation of an electrical impulse bythe egg.(D) the fusion of egg and sperm nucleiarrow_forward
- 5)What is the primary purpose of the fertilization membrane? a)Provide the growing embryo with food b)Serve as a barrier to protect the zygote from the environment c)Prevent multiple sperm from attempting to merge with an egg d)Hold the cells together when the zygote begins undergoing cell division e)None of these options is correctarrow_forwardOf the three polar bodies , one came from an unequal division of the ovum , but from where did the other two arise ? b ) A secondary division of the mature egg . c ) One is an undeveloped primary oocyte that failed to mature . d ) There were originally four polar bodies and one disappeared e)The division of the first polar body into two polar bodies .arrow_forwardWhich two extraembryonic structures form the placenta in humans? a) chorion and amnion b) amnion and yolk sac c) allantois and chorion d) yolk sac and allantois Please I need a quicker responsearrow_forward
- . In humans, identical twins are possible because(A) extraembryonic cells interact with the zygote nucleus.(B) convergent extension occurs.(C) early blastomeres can form a complete embryo if isolated.(D) the gray crescent divides the dorsal-ventral axis into new cells.arrow_forwardThe outermost (most superficial) extra embryonic membrane is____ a ) Allantois b ) Amnion d ) Ectoderm e ) Chorionarrow_forwardGastrulation is the (a) formation of three germ layers by the epiblast at the primitive streak, (b) formation of the placenta, (c) same as cleavage, (d) folding of the gut into a tube during week 4.arrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY