Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 23, Problem 10LTB
Summary Introduction
Introduction:
At the time of childbirth (delivery), the uterine muscle contract strongly and rhythmically to move the baby through the cervix and vagina is known as labor. This process is controlled by the hormone. The hormone oxytocin (a pituitary hormone) plays an essential role in uterine muscle contraction.
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Often, two hormones have opposite (antagonistic) effects on the same target organs. For example, oxytocin stimulates labor contractions, and progesterone inhibits premature labor.Name some other examples of antagonistic effects among the hormones?
Which of the following hormones controls the release of pituitary sex hormones?
LH - luteinizing hormone
FSH - follicle stimulating hormone
GNRH - gonadotropin releasing hormone
Testosterone
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Chapter 23 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
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 hormone causes FSH and LH to be released? a. testosterone b. estrogen c. GnRH d. progesteronearrow_forwardMatch each hormone with its effect. oxytocin a. growth of facial hair testosterone b. uterus contracts LH c. LH, FSH are released GnRH d. surge causes ovulation FSH e. follicle develops HCG f. milk is produced prolactin g. corpus luteum is maintainedarrow_forwardestrogen is produced by: hypothalamus, anterior pituitary, the egg, the uterus, or the follicles.?arrow_forward
- How is the release of oxytocin from the posterior pituitary gland during labor is an example of positive feedback mechanism?arrow_forwardWhich hormone is given to women during labor to increaseuterine contractions?arrow_forwardWhat hormone should be given to a mother to induce labor if it has not started naturally or can be used to strengthen contractions to aid childbirth? * prostaglandin O prolactin O vasopressin O oxytocinarrow_forward
- The level of a sex hormone, testosterone (T), is controlled by negative feedback. Another hormone, gonadotropin-releasing hormone (GNRH), is released by the hypothalamus of the brain, which triggers the pituitary gland to release luteinizing hormone (LH). LH stimulates the gonads to produce T. When there is too much T in the bloodstream, it feeds back on the hypothalamus, causing it to produce less GNRH. While this does not describe all the feedback loops involved in regulating T, answer the following questions about this particular feedback loop.arrow_forwardThe level of a sex hormone, testosterone (T), is controlled by negative feedback. Another hormone, gonadotropin-releasing hormone (GNRH), is released by the hypothalamus of the brain, which triggers the pituitary gland to release luteinizing hormone (LH). LH stimulates the gonads to produce T. When there is too much T in the bloodstream, it feeds back on the hypothalamus, causing it to produce less GnRH. While this does not describe all the feedback loops involved in regulating T, answer the following questions about this particular feedback loop. a. What is the stimulus in this system? Explain your answer.arrow_forwardName the pituitary hormone responsible for the following action: stimulates ovarian follicle to secrete estrogen and egg developmentarrow_forward
- Name one female sex hormone which is maintained at high levels throughout pregnancy. State two important functions of the hormone in pregnant women.arrow_forwardShannon, a 28-year old has been in the first stage of labor for 15 hours. Her uterine contractions are weak and her labor is not progressing normally: Shannon and her doctor desire a vaginal delivery, so the physician order a Pitocin be infused. What is the effect of this hormone?arrow_forwardWhat hypothalamic hormone triggers the release of ACTH from the anterior pituitary gland? What is the function of gonadotropin releasing hormone? Where is it released from? Know Table 16.2 Pituitary Hormones: Summary of Regulation and effects What is the function of oxytocin? What stimulates its release?What inhibits its release? What is its effects on the uterus? What is its effect on the breast? What is the function of ADH? What stimulates its release? What inhibits its? What is diabetes insipidus What is the function of Growth Hormone? What stimulates its release? What inhibits it? What are its effects on target organs? What is gigantisism, acromegaly and dwarfism? What is the function of TSH? What stimulates its release? What inhibits it? What are its effects on target organs? What are the effects of hypothyroidism and hyperthyroidism What is the function of ACTH? What stimulates its release? What inhibits it? What are its effects on target organs? What is cushing syndrome?…arrow_forward
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