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- During the menstrual cycle, a midcycle surge of _____ triggers ovulation. a. estrogen b. progesterone c. LH d. FSHwhats the inhibitory effect on the following for males: the The Follicle Stimulating Hormone, (FSH) The Luteinising Hormone (LH) and Testosterone (for males) For females, what is the inhibitory effect during the menstrual cycle for each of the following hormones: • Follicle Stimulating Hormone (FSH)• Luteinising Hormone (LH) • Oestrogen• ProgesteroneRelative Hormone Concentration 8 12 ♡ Days of Estrous Cycle The graph above shows the hormonal changes in the blood during the oestrous cycle in a ewe. The purple line represents Around day 2, the follicles in the ovary are . During this period, the lining of the uterus is in the The period around day 2 is called the
- Select all that help prepare the uterus for labor Unpregulation of oxytocin receptors Increasing calming effect from elevated estrogen level Atrophy of the myometrium Initiation of menstruationHypothalamus Hipotalamus GNRH Anterior pituitary Pituitari anterior FSH LH Sperm and Hormone J testis hormone K Figure 1 Rajah 1 ii. Describe how a high level of hormone J is regulated by negative feedback.Human chorionic gonadotropin Oxytocin Estrogens Progesterone Protactin Prostaglandins 1 2 3 4 7 8. 10 Months since start of last menstrual period Parturition For each hormone, select whether the hormone is increasing or decreasing at the beginning of parturition. In addition, select the correct effect that the change in hormone secretion causes. Hormone Levels Resulting Effect A. Causes the endometrial layer to break away from the uterus B. Causes the endometrial layer to be maintained C. Increases uterine contractions 1. Increasing 2. Decreasing D. Decreases uterine contractions E. Increases milk production in the mother's breasts F. Decrease milk production in the mother's breasts Hormone Hormone Levels Resulting Effect Estrogen Progesterone Oxytocin Prostaglandins Prolactin Plasma Hormone Concentration
- Human chorionic gonadotropin Oxytocin Estrogens Progesterone Protactin Prostaglandins 1 3 4 6 7 9 4 10 Months since start of last menstrual period Parturition For each hormone, select whether the hormone is increasing or decreasing at the beginning of parturition. In addition, select the correct effect that the change in hormone secretion causes. Hormone Levels Resulting Effect A. Causes the endometrial layer to break away from the uterus B. Causes the endometrial layer to be maintained C. Increases uterine contractions D. Decreases uterine contractions E. Increases milk production in the mother's breasts F. Decrease milk production in the mother's breasts 1. Increasing 2. Decreasing Hormone Hormone Levels Resulting Effect Estrogen Progesterone Охytocin Prostaglandins Prolactin Plasma Hormone ConcentrationFSH (Follicle Stimulating Hormone) E2 (Estrogen/Estradiol) LH (Luteinizing Hormone) PG (Progesterone) OVULATION! PERIOD 14 28 Hormone changes in an average cycle Observe the diagram above. This graph represents the hormone levels during an average menstrual cycle. Answer the following questions. What does the y-axis represent? 2. What does the x-axis represent? (the unit is in days) 3. Notice that each hormone is represented by a specific color. Make a prediction based on observations from the diagram. Which hormone do you think triggers a period (shedding of the lining of the uterus)? Justify your answer. HORMONE LEVELS IIIReproductive Hormones Reproductive Structures 1. FSH 6. Follicle 2. LH 7. Corpus luteum 3. Estrogen 8. Hypothalamus 4. Progesterone 9. Anterior pituitary 5. GNRH Gonadotropic hormones are released by the anterior pituitary to regulate the functions of the gonads (testis in males and ovaries in females). Use the list and select: a gonadotropic hormone the structure it stimulates in the ovaries the main hormone that is released as a result Record your answer as a three-digit number in the following order: Gonadotropic The structure The main hormone it acts on hormone released
- secondary sex characteristics The gonadotropin-releasing hormone has ultimate control over the male reproductive system because it secretes hypothalamus. androgen cerebral cortex seminiferous tubules GNRH stimulates the follicle-stimulating to produce the two gonadotropic hormones. interstitial cells testosterone In males, hormone promotes spermatogenesis in the hormone controls the production follicle-stimulating and of testosterone by luteinizing estrogen The main sex hormone in men is called and is responsible for the maturation of sperm and the as height, broad shoulders, muscle development, and a deep voice. such gonadotropin-releasing hormone hypothalamus anterior pituitaryHormone Day 4 Day 14 Day 21 Estrogen (pg/mL) N/A >100 <60 Progesterone (ng/mL) N/A <1.5 >15 LH (mIU/mL) <7 >15 N/A FSH (mIU/mL) <13 >15 N/A An LH level of 16 mIU/mL in a woman would normally indicate that Select one: a. new follicles are maturing b. the endometrium is shedding c. the corpus luteum is degenerating d. ovulation is occurringThe most significant source of serum testosterone in the normal woman is: liver production from ovarian estradiol peripheral production from adrenal DHEA ovarian granulose cell production luteal cell production