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1. A mutaton in the gene W causes a post-pubertal onset of functional defect in Leydig cells. Which of the following profiles is associated with a male carrying this mutation in the gene W, at 30 years of age?• a. Below normal plasma inhibin levels• b. Below normal sperm counts in semen• c. Below normal plasma LH levels• d. Above-normal hematocrit• e. Cryptorchidism (testes in the body cavity)2. Which of the following can contribute to infertility in a young male body builder taking anabolic steroids for an extended period?• a. Decreased circulating levels of DHT.• b. Suppression of conversion of T to E in the testis.• c. Decreased intra-testicular testosterone concentration.• d. Increased muscle mass.• e. Decreased circulating androgen levels3. Compared to a normally cycling female, a post-menopausal woman would have:• a. higher plasma estradiol levels.• b. comparable (similar) plasma progesterone levels.• c. higher GnRH levels in the hypothalamo-pituitary portal blood.• d. lower plasma FSH levels.• e. comparable (similar) plasma LH levels.4. An infertile couple has elected to conceive a baby using in vitro fertilization but without using fertility drugs. In order to catch the window when the woman ovulates, you have monitored her urinary levels of LH (and its metabolites) and performed ultrasound imaging of her ovaries. After detecting significantly elevated urinary levels of LH (and its metabolites), you decide to wait 7 hours before extracting the oocyte. This decision to delay extraction of the oocyte for 7 hours after detecting an increase in LH levels is because the midcycle LH surge causes:• a. formation of antrum in the mature/Graafian follicle.• b. meiotic progression of an oocyte from prophase I to metaphase II.• c. capacitation during the sperm entry.• cortical reaction in an oocyte.5. Mary is a happily pregnant 35-year old woman. She is into the 21st week of pregnancy with twins. Unfortunately, Mary's doctor, Dr. So Right has just found out that Mary has benign tumors in both of her ovaries. Dr. So Right can suggest a surgery to remove both of Mary's ovaries right away because Mary's placenta secretes:• a. LH and FSH• b. estrogen and progesterone• c. estrogen and prolactin• d. hCG and hPL• e. oxytocin and prolactin
How are nuclear DNA and mitochondrial DNA transferred.
What would happen to heart rate and peripheral resistance? Would it be probable to build a working circuit without the inhibitory interneuron? If so, how would you do it? If not, why can't you do it.
Enzymes greatly decrease the activation energy. Describe two of the ways they do this and be specific in terms of chemical mechanisms.
Both the endocrine and nervous system are main regulating systems of the body though the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain the comparison.
Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinate a response in the human body.
List in order the higher taxons used in classification (domain, kingdom, phylum, genus, species) List the 3 domains and how they differ. Describe uses and effects of microbes for man.
A young man twenty-one years of age has come into the local health clinic with a hemoglobin of 11.9 gm/dL and a hematocrit of 25 percent.
give Name the three major components of a homeostatic control system and tell briefly the function of each component.
In Staphylococcus epidermidis, bacillus subtilis and escherichia coli, which one has gram- positive, which one has gram-negative? Also, which organism is the biggest? Which one is the least.
Name the bones of pectoral girdle and the bones of the pelvic girdle. Evaluate the pectoral and pelvic girdles with regard to strength, versatility, and function.
A flower breeder analyzed that a cross between true-breeding red tulips and true-breeding white tulips makes all red-flowering F1 offspring.
Write down an essay that describes how you would conduct an experiment for your plant hypothesis include an instance of how you would use this method in a real life situation explain each step of the method as it applies to your web experiment and re..
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