Section 51-1 VOCABULARY REVIEW 1. Target cells are the specific cells that are affected by a hormone. 2. A second messenger is an intracellular molecule that amplifies the signal of a first messenger. 3. A prostaglandin is a lipid that regulates the activity of cells that are in close proximity to its site of production. 4. Hormones are molecules that are secreted in small amounts‚ circulate in the bloodstream‚ and affect distant target cells. MULTIPLE CHOICE 1. d 2. c 3. a 4. c 5. c SHORT ANSWER
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This process can take anywhere from three to five days. During this time‚ if the egg unites with a sperm in the fallopian tube‚ it will become fertilized and attach itself to the endometrium when it arrives in the uterus and pregnancy will ensue. If fertilization does not occur‚ the proper hormones will be released to break down the endometrium
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is due to problems with ovulation which is the process by which an egg is released every month from the ovaries. There are many hormonal conditions which cause problems to ovulation such as Polycystic Ovary Syndrome(PCOS). This is a condition which makes it difficult for an ovary to produce an egg every month. The hormones LH (Luteinizing Hormone) and FSH (Follicle-Stimulating Hormone) are vital for ovulation as they signal an egg to develop and be released from the ovary. Injury to the hypothalamus
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adhesions which cause pain during the intercourse and is a symptomatic of infertility‚ also endometriosis were the endometrial tissue is found outside the uterus‚ furthermore ovulation is another cause where the ovary of the women doesn’t produce a mature egg (Nejm. Rebar and DeCherney 2004). Just 15 percent of these women had infertility services in their lives. The procedures in the United States had doubled in the last 10 years. In 2006 there were 138‚198 cycles with a result of 41‚343 live births and
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Life on earth A. Procaryotic Organisms 1. The prokaryotic cell‚ unlike the eukaryotic cell‚ is able to survive in an oxygen-deprived‚ mineral-deprived and vitamin-deprived environment. The normal cells in our body‚ the eukaryotic cells need oxygen‚ vitamins and minerals to be able to survive. 2. The classification system of prokaryotes Classification of Prokaryotes Procaryotes can be divided into two distinct groups‚ archaea and eubacteria. Each group has its own characteristics
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involved. The male gamete‚ or sperm‚ and the female gamete‚ the egg or ovum‚ meet in the female’s reproductive system. http://www.nhs.uk/news/2010/01January/PublishingImages/P632053-Coloured_SEM_of_egg_cell_in_secondary_follicle-SPL.jpgWhen the sperm fertilizes‚ or meets‚ the egg‚ this fertilized egg is called the zygote. The zygote goes through a process of becoming an embryo and developing into a foetus. The female reproductive system enables a woman to: produce eggs (ova) ------------------------------------------------------------>>>
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genetic reasons. ART is also used in couples who are discordant for certain communicable diseases‚ i.e. AIDS‚ to reduce the risk of infection when a pregnancy is desired. The term also includes any reproductive technique involving a third party e.g. a sperm donor. What are Assisted Reproductive Technologies? Procedures Procedures are mainly fertility medication‚ as well as ART techniques that use more substantial and forceful interventions‚ of which in vitro fertilization (IVF) and expansions of it
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reproductive systems (sperm and egg). First‚ in order for a baby to come into this world‚ the male and the female reproductive systems must work correctly. Both male and female has their own/different parts that work in order for a baby to be conceived. Although the male and the female reproductive systems are different‚ once they meet and come together they work together to make a baby at the end of result. The male’s reproductive system produces something called a sperm; a tadpole like cell
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be 3 chromosomes present in each of the cells that make up the stomach of mosquito. 22b) Interphase | b | Prophase | C | Metaphase | D | Anaphase | A | Telophase | E | 22c) There would be 3 chromosomes present in the sperm cells of a mosquito. 22d) Interphase | C | Prophase 1 | A | Metaphase 1 | I | Anaphase 1 | E | Telophase 1 | F | Prophase ii | H | Metaphase ii | B | Anaphase ii | G | Telophase ii | d | Prophase 1 is where
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The Mammalian Urogenital Lab Questions 1. The urine needs to be stored in egg-laying animals so that the fetus is not trapped in pools of urine inside of the egg. This keeps the urine separate from the fetus and its nutrients. 2. The fetuses of mammals that bear their young alive do not need a urine sac and does not form urine because all of the fetuses waste is taken out through the mother either through the placenta or the umbilical cord. 3. The testes are separated from the abdominal
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