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Anatomy and Physiology
- Describe the main actions performed by oxytocin. Why parturition can occur without elevated levels of plasma oxytocin?arrow_forwardExplaintheroleofmitosisin: (a) A developing embryo (b)Anadult:arrow_forwardA 30-year-old man has very small muscles, a sparse beard, and a high-pitched voice. His plasma concentration of LH is elevated. Explain?arrow_forward
- Describe the change in progesterone secretion that occurs in preparation for parturition.arrow_forwardWhat is the purpose of prostatic secretion?arrow_forwardIn the milk-letdown reflex, which cells are categorized as neuroendocrine cells? a) Sensory neurons in the breast tissue b)Neurons that synthesize oxytocin and form junctions with capillaries c)Neurons that contract and cause expulsion of milkarrow_forward
- Differentiate between infertility and impotence.arrow_forwardNegative feedback loops maintain homeostasis in the human body. During labour a positive feedback loop is an integral part of the process. A) What is a positive feedback loop? B) Describe the two positive feedback that is used during parturition. Make sure to include both hormones involved in parturition.arrow_forwardExplain the advantages gained by the individual through the production of lgE.arrow_forward
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