Read the following statements CAREFULLY: I. II. III. IV. The peripheral nervous system is formed by the neural crest. Neural crest cells express N-cadherin to separate from the surface ectoderm Oligodendrocytes are responsible for guiding migratory neuroepithelial cells Sox 1,2,3 transcription factors are responsible for activating the neural plate a. IV is true c. I, II, and IV are true but III is only sometimes true b. I and II are true but III is false d. All are true

Read the following statements CAREFULLY: I. II. III. IV. The peripheral nervous system is formed by the neural crest. Neural crest cells express N-cadherin to separate from the surface ectoderm Oligodendrocytes are responsible for guiding migratory neuroepithelial cells Sox 1,2,3 transcription factors are responsible for activating the neural plate a. IV is true c. I, II, and IV are true but III is only sometimes true b. I and II are true but III is false d. All are true

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter49: Endocrine Regulation

Section: Chapter Questions

Problem 1TYU: A cell secretes a product that diffuses through the interstitial fluid and acts on nearby cells....

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A. CRANIAL (CEPHALIC) NEURAL CREST B. TRUNK NEURAL CREST C. VAGAL AND SACRAL NEURAL CREST Trace their differentiation pathways from the time the precursor cells break away from the neural tube. Make sure that this three (3) derivatives utilize different migratory pathways.
The pituitary gland starts sending out hormones into the blood stream to initiate puberty, as is seen in the image. Which of the following statements best describes what the image is showing about how those hormones are received by the organs associated with puberty? The hormones circulate all over the body and act upon every cell. The hormones are dispersed to a specific area of the body and bind to target cells there. The hormones are dispersed and received only by cells in range of the signal before they degrade. The hormones circulate all over the body and bind to specific receptors that only target cells possess.
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Enumerate five (5) ways on how to track the routes of the neural crest cells.
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which of the following happens when a therapeutic synthetic homone is introduced intno the body to treat patients natural hormone insufficiency?(select all that apply) A. The target cell responds the same way as when the hormone is natural B. the synthetic hormone has no effect on the target tissues C. the amount of natural hormone produced by the patients body declines D. the synthetic hormone is destroyed before it can have an effect on the target tissue.
1. Use the following scenario to answer questions: Stimulation of G-protein coupled receptors on ovarian cells by certain pituitary hormones promotes the synthesis of estrogen and progesterone using Gαs pathways. Suppose you are studying the release of estrogen from cultured ovarian cells exposed to pituitary hormones. What effect would the following conditions have on estrogen release in response to the pituitary hormones? Genetic deletion (knockout) of Gα along with overexpression of constitutively active PKA would result in (hint: think of epistasis experiments) Answers: a. No change in estrogen release b. Increased release of estrogen c. Decreased release of estrogen d. Can not be determined 2. Imagine that you knocked out the gene encoding the anaphase inhibitor (securin) in a population of fission yeast. Would you expect these yeast cells to be smaller than normal, longer than normal or normal-sized? a. Smaller…
A second hit might arise because of viral infection. Tumor-initiating viruses often target RB1 for inactivation. What advantage would a virus gain by inactivating RB function in the host cell? Human papillomavirus (HPV) is an example of a virus that inactivates RB and causes tumors. Which cancer is HPV infection most closely associated with? How is HPV able to inactivate RB? (3-4 sentences only) (You’ll need to use the internet for this question, so make sure you paraphrase AND cite your sources)
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