Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 38.6, Problem 1TYK
Summary Introduction
Introduction: Hormones can be defined as chemical substances that are produced in the body which regulates the action of some cells or organs. Many hormones are released by special glands such as the thyroid hormone that is formed by the thyroid gland.
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Match four of the hormones of the negative feedback numbered above with their function given below.
Function:
Hormone:
Stimulates the development of an ovum
Answer
Stimulates the corpus luteum to release progesterone
Answer
Suppresses GnRH, FSH, and LH production in the follicular phase
Answer
Suppresses GnRH, FSH, and LH production in the luteal phase
Answer
Select the two different ways that chemicals that might cause problems with sexual development and reproduction work
- Estrogen mimics disrupt the endocrine system by attaching to molecules that except the hormone estrogen
- estrogen prevents testosterone from developing.
- hormone blockers keep certain hormones from attaching to their receptors.
- hormone blockers help certain hormones attach to their receptors.
Which of the following statements is NOT true concerning the hormonal control over the male reproductive system?
These hormones are involved in a negative feedback relationship
The hypothalamus secretes a hormone called gonadotropin-releasing hormone
Luteinizing hormone controls the production of sperm in the seminiferous tubules
Follicle-stimulating hormone and luteinizing hormone are present in both males and females
The interstitial cells produce testosterone
Chapter 38 Solutions
Principles of Biology
Ch. 38.1 - Prob. 1TYKCh. 38.1 - The synthesis of which class of hormone requires...Ch. 38.2 - Prob. 1BCCh. 38.2 - Prob. 1TYKCh. 38.2 - Prob. 2TYKCh. 38.3 - Prob. 1BCCh. 38.3 - Prob. 1TYKCh. 38.3 - Prob. 2TYKCh. 38.4 - Prob. 1CCCh. 38.4 - Prob. 1TYK
Ch. 38.5 - Some children with short stature can be...Ch. 38.5 - Prob. 2TYKCh. 38.5 - Prob. 1CCCh. 38.6 - Prob. 1TYKCh. 38.7 - Prob. 1TYKCh. 38 - Prob. 1TYCh. 38 - Prob. 2TYCh. 38 - Which is false about polypeptide hormones? They...Ch. 38 - Which is false about the control of hormones? Many...Ch. 38 - Prob. 5TYCh. 38 - Prob. 6TYCh. 38 - Prob. 7TYCh. 38 - Prob. 8TYCh. 38 - Prob. 9TYCh. 38 - Prob. 10TYCh. 38 - What is the function of leptin, and what is the...Ch. 38 - Prob. 2CCQCh. 38 - A principle of biology is that living organisms...Ch. 38 - Prob. 1CBQCh. 38 - Discuss the role of the different steroid hormones...
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- Figure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardBesides producing gametes (sperm and eggs), the primary male and female reproductive organs also produce sex hormones. The _____ and the pituitary gland control secretion of both.arrow_forwardWhich hormone causes FSH and LH to be released? a. testosterone b. estrogen c. GnRH d. progesteronearrow_forward
- Match 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_forwardWhat is the expected effect on reproduction on an individual with hormone levels shown above? Identify two physiological changes that will not occur due to the atypical hormone levels shown above. The graph below shows the estrogen and progesterone levels of an individual during a menstrual cycle of 28 days. The top light blue line indicates the progesterone levels and the bottom purple line indicates the estrogen levels. This individual is in luteal phase.This individual can be expected to have low levels of FSH and LH.arrow_forwardExplain the relationship of the following pairs of terms. Briefly explain its relations 1.) Positive Feedback and oxytocin 2.) Negative Feedback and insulin 3.) Ovary and estrogen 4.) Testis and testosterone 5.) Neuron and nerve impulsearrow_forward
- increased levels of estrogen and progesterone will result in ( negative, positive, increase, decrease) feedback to the hypothalamus and anterior pituitary to ( negative, positive, increase, decrease), ( LH, FSH, GnRh, LH AND FSH) production. This normally occurs during the ( FOLLICULAR STAGE, LUTEAL STAGE ) Decreased levels of estrogen and progesterone will result in ( negative, positive, increase, decrease) feedback to the hypothalamus and anterior pituitary to ( negative, positive, increase, decrease), (LH, FSH, GnRh, LH AND FSH) production. This normally occurs during the ( FOLLICULAR STAGE, LUTEAL STAGE ). Extremely high levels of estrogen near the end of the follicular phase will result in ( negative, positive, increase, decrease) feedback to the hypothalamus and anterior pituitary to release a large amount of ( LH, FSH, GnRh, LH AND FSH) to trigger ovulation. Some hormones are used in oral contraceptive pills to suppress the release of ( LH, FSH, GnRh, LH AND FSH) Without…arrow_forwardWhich of the following statements correctly describes the effects of increased testosterone? a. Increased levels of testosterone result in increased sperm production b. Increased levels of testosterone decreases the release of FSH and LH c. Increased levels of testosterone stimulates the release of GnRH d. Increased levels of testosterone stimulates the release of FSH and LH.arrow_forwardMatch four of the hormones of the negative feedback numbered above with their function given below. Function: Hormone: Stimulates the release of testosterone Answer Inhibits the release of FSH Answer Stimulates spermatogenesis Answer Stimulates the development of secondary sex characteristics Answer;arrow_forward
- Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estradiol are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardRight before the ovulation, the maturate follicle secretes high levels of estrogen which switches from negative to positive feedback regulation of the HPG axis. Positive feedback regulation of estrogen will result in __________ of estrogen levels, leading to an ____________ surge further increase; progesterone further increase; LH decrease; progesterone decrease, LHarrow_forwardWhat are the main effects of gonadotropic hormones? Select all that apply. Stimulation of the formation of the ova Stimulation of the secretion of hormones from sex Stimulation of the development of secondary female sexual characteristics Stimulation sustains pregnancy Stimulation of the hormone progesteronearrow_forward
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