Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 18, Problem 12RQ
Which hormone is primarily responsible for the contractions during labor?
a. oxytocin
b. estrogen
c.
d. progesterone
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Chapter 18 Solutions
Concepts of Biology
Ch. 18 - Figure 18.12 Which of the following statements...Ch. 18 - Figure 18.17 Which of the following statements...Ch. 18 - In which group is parthenogenesis a normal event?...Ch. 18 - Genetically unique individuals are produced...Ch. 18 - External fertilization occurs in which type of...Ch. 18 - The process of gastrulation forms the _______. a....Ch. 18 - Which of the following gives rise to the skin...Ch. 18 - Sperm are produced in the _______. a. scrotum b....Ch. 18 - Which female organ has an endometrial lining that...Ch. 18 - Which hormone causes FSH and LH to be released? a....
Ch. 18 - Nutrient and waste requirements for the developing...Ch. 18 - Which hormone is primarily responsible for the...Ch. 18 - What might be a disadvantage to...Ch. 18 - Compared to separate sexes and assuming...Ch. 18 - What do you think would happen if multiple sperm...Ch. 18 - Compare spermatogenesis and oogenesis as to timing...Ch. 18 - Describe the events in the ovarian cycle leading...Ch. 18 - Describe the stages of labor.
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- What is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionarrow_forwardIt is the hormone that releases progesterone a. estrogen b. luteinizing c. progesterone d. inhibinarrow_forwardWhat is the purpose of androgen binding protein by Sertoli cells of the testes? a. Potentiates the actions of testosterone at target cells b. Prevents testosterone from diffusing out the testes c. Regulates level of testosterone via negative feedback control at the level of the anterior pituitary d. To stimulate testosterone productionarrow_forward
- After a woman gives birth, what happens to her levels of estrogen, progesterone, and prolactin? a. Progesterone, estrogen, and prolactin levels all decrease. b. Progesterone and prolactin levels decrease, and estrogen levels increase. c. Progesterone, estrogen, and prolactin levels all increase. d. Estrogen and prolactin levels increase, and progesterone levels decrease.arrow_forwardWhich hormone causes Leydig cells to make testosterone? a. FSH b. LH c. inhibin d. estrogenarrow_forwardWhat does the combination pill for birth control contain? A. Estradiol and testosterone B. Testosterone and insulin C. Estradiol and progesterone D. Oxytocin and vasopressinarrow_forward
- Positive feedback mechanism initiates the rhythmic contractions of labor. Determine the hormones involved in this feedback loop. a. relaxin and human chorionic gonadotropin (hCG) b. prostaglandins and oxytocin c. cortisol and aldosterone d. estrogens and progesteronearrow_forwardWhich statement is accurate about the ovarian cycle? a. GnRH inhibits the anterior pituitary from secreting FSH and LH. b. Progesterone stimulates the follicle cells to mature. c. Estrogen production ceases when the secondary oocyte is ovulated. d. High levels of estrogen stimulate the anterior pituitary to secrete FSH and LH.arrow_forwardDuring the third trimester of pregnancy, the placenta is not the primary source of which hormone in maternal blood?a. estrogenb. prolactinc. progesteronearrow_forward
- What would happen if the placenta was not able to fulfill its endocrine function in a pregnantwoman? A. The level of hCG released by the trophoblast would increase B. Mature follicles would not be released by the ovaries C. FSH and LH levels would increase D. The corpus luteum would not be maintainedarrow_forwardWhich hormone stimulates the development of the mammary glands and secretion of milk? A. Prolactin B. Melatonin C. Growth hormone . D. Epinephrinearrow_forwardWhich hypothalamic hormone contributes to the regulation of the male reproductive system? a. luteinizing hormone b. gonadotropin-releasing hormone c. follicle-stimulating hormone d. androgensarrow_forward
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