BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 51, Problem 9TY
Summary Introduction
Introduction: Gastrointestinal tract also called the digestive tract formation starts in the third week of the pregnancy. This tract extends from the buccopharyngeal membrane to the cloacal membrane.
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The 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.
If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface of a second gastrula where skin would normally develop, the transplanted cells will still develop into tissues of the nervous system. This experiment shows that the transplanted cells areA. differentiated.B. totipotent.C. discontinuous.D. determined.E. endodermal.
Which 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.
Chapter 51 Solutions
BIOLOGY (LL)
Ch. 51.1 - CoreSKILL How did Paland and Lynch test the...Ch. 51.1 - CoreSKILL Approximately how many times more often...Ch. 51.1 - Prob. 3EQCh. 51.3 - Prob. 1CSCh. 51.4 - Prob. 1CSCh. 51.4 - Prob. 2CSCh. 51.4 - Prob. 1CCCh. 51 - Prob. 1TYCh. 51 - Which is considered an advantage of sexual...Ch. 51 - Prob. 3TY
Ch. 51 - Prob. 4TYCh. 51 - Prob. 5TYCh. 51 - Prob. 6TYCh. 51 - A major function of FSH is to a. stimulate the...Ch. 51 - During the human ovarian cycle, ovulation is...Ch. 51 - Prob. 9TYCh. 51 - Prob. 10TYCh. 51 - Prob. 1CQCh. 51 - Prob. 2CQCh. 51 - Prob. 3CQCh. 51 - Prob. 1COQCh. 51 - Describe the events of the ovarian and uterine...
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- Gastrulation in a mammal would be most similar to gastrulation in a. a gecko. b. a tuna. c. an eagle. d. no other species; mammalian gastrulation is uniquearrow_forwardIn the development of the nervous system, one of the following is false? O a. The neural tube maintains temporary contact with the yolk sac cavity via neuropores. O b. The neural tube develops from ectoderm. O c. The neural groove forms from the neural plate. d. The neural folds are composed of neuroectoderm cells. e. The ectoderm fuse to cover the neural crest & the neural tube is the surface ectoderm. Clear my choicearrow_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
- In a developing human, the first organ to form is thea. heart.b. brain.c. notochord.d. liver.arrow_forwardWhich 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_forwardIn the development of the nervous system, one of the following is false? The neural tube maintains temporary contact with the yolk sac cavity via neuropores. O a. O b. The neural tube develops from ectoderm. O c. The neural groove forms from the neural plate. d. The neural folds are composed of neuroectoderm cells. O e. The ectoderm fuse to cover the neural crest & the neural tube is the surface ectoderm Clear my choice marks Jump to... ©2020 SKITCE-AQU/Powered by Moodle A https://www.alguds.edu eclass@alguds.eduarrow_forward
- Which of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous systemarrow_forwardWhich of the following statements regarding negative feedback is false?a. It helps regulate variables such as body temperature and bloodpressure.b. It is the mechanism by which birth occurs in mammals.c. It is a major feature of homeostatic control systems.d. It prevents homeostatic responses from overcompensating.e. It may occur at the organ, cellular, or molecular level.arrow_forwardPremature babies born before the 26th week of gestation develop physiological problems because Select one: a. gastrulation did not complete b. amniotic fluid is required for breathing c. cell specialization has not begun d. organs are underdevelopedarrow_forward
- Provide the common name for the region to which each of the following terms refers:a. Acromial b. Antebrachial c. Axillaryd. Buccal e. Celiac f. Coxalg. Crural h. Femoral i. Genitalj. Gluteal k. Inguinal l. Mentalm. Occipital n. Orbital o. Oticp. Palmar q. Pectoral r. Pedals. Plantar t. Popliteal u. Sacralv. Tarsal w. Umbilical x. Vertebralarrow_forwardRead following statements w.r.t. cockroach and choose the option which correctly states true and false statements. A. Grinding of food is carried out in mouth by the mandibles. B. Proventriculus has an outer layer of thick circular muscles and thick inner layer of cuticle. C. Both compound and simple eyes are responsible for mosaic vision only during night. D. Females produce 14-16 oothecae, each containing 9- 10 eggs. A B C (1)True FalseFalseTrue (2) True True FalseFalse (3)True FalseTrue False (4) False FalseTrue True (1)arrow_forwardOdontoblasts are derived from a. Ectoderm b. Endoderm c. Histiocytes d. Undifferentiated mesenchymal cellsarrow_forward
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