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29. Which of the following cells create the blood testis barrier?

16. Which of the tubules is impermeable to water

23. What is the major difference between mitosis and meiosis I in a diploid organism?

10. Under normal conditions, glomerular filtration depends on three main pressures. Which of those pressures is a pressure that favors the filtration pressure?

17. The majority of the water filtered in the glomerulus is reabsorbed by the

23. The mechanism for producing concentrated urine involves all of the following EXCEPT

13. A urine pH of 4.6 can indicate ________.

18. Evaluate the following situations, and select the one in which antidiuretic hormone (ADH) would be released from the posterior pituitary.

16. Body cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in a gamete from a roundworm?

49. Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. They rarely live past their twenties. How likely is it for a woman to have this condition?