Human Physiology: From Cells to Systems (MindTap Course List)
Author: Lauralee Sherwood
Publisher: Cengage Learning
Estrogen (a female sex hormone) levels continuously increase during a woman's menstrual cycle. Estrogen levels drop once menstruation occurs (the ovaries stop releasing estrogen).
Is this an example of positive or negative feedback?
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Which hormone is primarily responsible for the contractions during labor? a. oxytocin b. estrogen c. -HCG d. progesterone
If there is a decrease in the amount of estrogen level during the menstrualcycle. What type of feedback mechanism will likely to occur?a. Dependent feedback mechanismb. Negative feedback mechanismc. Positive feedback mechanismd. Independent feedback mechanism
Why does the estrogen released at the follicular phase inhibit FSH levels by a negative feedback mechanism? A high level of FSH will cause ovulation. A high level of FSH will cause menstruation. To ensure that the endometrium is ready to receive an embryo. To prevent multiple follicles from maturing at the same time.
A baby suckling from the breast, stimulates the letdown of milk from the lactiferous lobules, is another example of positive feedback. True False
Which of the following correctly identifies the hormones that trigger ovulation and the hormone that increases its level after ovulation, respectively? Select one: A. FSH and LH. B. LH and progesterone. C. Progesterone and estrogen. D. Estrogen and FSH.
Labour is controlled by the nervous and endocrine systems through a positive feedback system.In which example have we encountered another positive feedback system in Biology 30? a. Reflex loop in the PNS b. FSH levels during sperm production c. Progesterone during menstruation d. Prolactin during lactation
Right 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, LH
How may positive feedback happen during parturition cycle (NOT uterine contraction cycle)? a) 0, b)1, c)2, d)3, e)4
Read the following passage: When oestrogen concentration is high it stimulates the release of LH. LH stimulates the ovaries to release more oestrogen. State whether this is an example of negative or positive feedback and which organs are involved. Explain your answer.
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
Why does the body temperature increase during the second half of the menstrual cycle?
Explain 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 impulse
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