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Q1 antianxiety drug contain
(a)caffeine
(b)cocaine
(c)amphetamine
(d)benzodiazepines
Q2 menstrual cycle in primates starts with the
(a)menstrual phase
(b)luteal phase
(c)secretory phase
(d)ovulatory phase
Step by step
Solved in 3 steps
- Test Your Understanding 12 INTERPRET DATA Examine Figure 50-14. Which hormones are present in largest concentration just before ovulation? During which part of the menstrual cycle is the endometrium most prepared to receive an embryo? Which hormones stimulate thickening of the endometrium? Gonadotropic hormones and ovarian hormones regulate the monthly sequence of events that take place within the ovary and uterus. The preovulatory phase begins with menstruation; the postovulatory phase begins after ovulation. Figure 50-14 Endocrine regulation of the menstrual cycle When fertilization does not occur, the menstrual cycle repeats about every 28 days. Note the changes in hormone concentrations that regulate the menstrual cycle. (FSH, follicle-stimulating hormone; LH, luteinizing hormone) PREDICT What happens when a. womans ovaries produce a very low amount of estrogen?in your own words: Compare the reproductive organs of reptiles and birds. How are their reproductive patterns advantageous for their survival?Refer to the diagram below 1. How long is one menstrual cycle? 2. On which day of the menstrual cycle does the period start? 3. On which day of the menstrual cycle is an egg released from the ovary? 4. What happens to the lining of the uterus if an egg is not fertilised? 5. Does a woman have periods while she is pregnant? Explain your answer. 6. How long does a period usually last in the 28-day cycle? 7. If an egg was released from the left ovary on the 2ndMarch, when would the next egg be released from the right ovary? 8. If a woman has a period which begins on the 1st January, when will her next period begin? 9. An egg can survive for up to 3 days after it is released (up to day 17). Sperm can survive up to 8 days inside the woman. Susie want to have a baby. She has a cycle exactly like on the diagram. On which days is she most fertile (most likely to get pregnant)?
- 1. Describe how urine is formed and excreted in frogs. - Include in the discussion the structures involved in the process. 2. Describe the step-by-step fertilization process in an amphibian. - Include in the discussion the structures involved in the process. 3. What is the importance of feedback systems in the control of hormonal output in amphibians? - Provide/elaborate one hormonal feedback pattern observed in amphibians.1. How is the reproductive system designed to perform its functions? 2. How do the parts (each part) of the reproductive system work together? 3. Why is it advantageous that the testes are located outside the abdominal cavity? 4. Trace the pathway of sperm from the testis to outside the body 5. Explain the presence of numerous mitochondria in the sperm 6. What adaptations do sperm posess for fertilozation? 7. How is the uterus structurally adapted for holding a developing baby? 8. What happens when the egg is not fertilized?Illustrate a model of female reproductive system of turtle showing structures and pathways during oviposition
- Which of the following is a true statement?(A) All mammals have menstrual cycles.(B) The endometrial lining is shed in menstrual cycles butreabsorbed in estrous cycles.(C) Estrous cycles are more frequent than menstrual cycles.(D) Ovulation occurs before the endometrium thickens inestrous cycles.How do the two kinds of mammalian reproductive cycles—estrous and menstrual—differ from each other?Compare and contrast the Oogenesis and structure of the ovaries of: Rat (Vertebrates) Starfish (Invertebrates) Grasshopper (Insects) Frogs (Amphibians)
- Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms?What would be the external genital appearance of a mammal exposed to high levels of both androgens and estrogens during early development? What if it were exposed to low levels of both?Describe how the reproductive structures of each organism are adapted towards the given characteristics of the animals: 1. Solitary and slow-moving lifestyle of Lissachatina fulica 2. Saltatory mode of life in Rhinella marina 3. Temperature regulation of mammalian sperm cell production