EBK BIOLOGY
6th Edition
ISBN: 8220106777640
Author: Maier
Publisher: PEARSON
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Chapter 23, Problem 5LTB
Summary Introduction
Introduction:
Menstruation is a natural process in women which is regulated by several hormones. The length of a menstrual cycle is 28 to 29 days. In the menstrual cycle, the female body prepares both an egg for fertilization and the uterus for a possible pregnancy. If no fertilization occurs, the uterine lining is excreted through the vagina by a process called menstruation.
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Oocytes develop in a multicellular structure, the follicle. After ovulation, most of the follicle cells remain in the ovary, forming a temporary endocrine gland, the_______. This gland disintegrates about 10 days afterovulation unless stimulated by a hormone,_______ ,secreted by the developing embryo.
A female’s first menstrual cycle is _______,whereas _______ is when the female’s menstrualcycles cease.
In females the shedding of the uterine lining (a menstrual period) is stimulated by _________.
an increase in progesterone and estrogen levels in the blood
a decrease in progesterone and estrogen levels in the blood
release of the follicle from the ovary
the arrival of the egg in the uterus
Chapter 23 Solutions
EBK BIOLOGY
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 is the correct order for one turn of the menstrual cycle? a. corpus luteum forms, ovulation, follicle forms b. follicle grows, ovulation, corpus luteum formsarrow_forwardDuring the menstrual cycle, a midcycle surge of _____ triggers ovulation. a. estrogen b. progesterone c. LH d. FSHarrow_forwardOvulation releases _________. a. the corpus luteum b. a primordial follicle c. a primary oocyte d. a secondary oocyte and first polar bodyarrow_forward
- Figure 43.17 Which of the following statements about the menstrual cycle is false? Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. Menstruation occurs just after LH and FSH levels peak. Menstruation occurs after progesterone levels drop. Estrogen levels rise before ovulation, while progesterone levels rise after.arrow_forwardFigure 18.17 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 estrogen 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 estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forwardThe secretion of _____ controls the formation of sperm. a. testosterone b. LH c. FSH d. all of the abovearrow_forward
- Sherrise is a sexually active college student. OnSaturday night, she has unprotected sex with her boyfriend.On Tuesday morning, she experiences the twinge of midcyclepain that she typically feels when she is ovulating.This makes Sherrise extremely anxious that she might soonlearn she is pregnant. Is Sherrise’s concern valid? Why orwhy not?arrow_forwardThe _____, a network of veins in the spermatic cord, helps keep the testes cooler than the core body temperature.arrow_forwardAfter ovulation, the mature follicles collapses, taking on a yellowish appearance to become the _________. Corona radiata Graafian follicle Corpus luteum Zona pellucida Degenerating folliclearrow_forward
- The tail of a sperm cell is a __________.arrow_forwardThe ____(functional, basal) layer of the____(endometrium, myometrium, perimetrium) of the uterus builds up and regresses throughout the female ovulatory cycle.arrow_forwardPart A Which of the following is most likely to occur as an immediate result of an injection of estradiol in a female mammal? endometrium will decrease in thickness O follicle will decrease in size ovulation will occur O LH production will increase Submit Request Answerarrow_forward
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Reproduction: Crash Course Zoology #9; Author: CrashCourse;https://www.youtube.com/watch?v=poLyJDVjKlM;License: Standard youtube license