D) urea E) potassium ions 34. Which of the following descriptions matches the pr
ID: 3518999 • Letter: D
Question
D) urea E) potassium ions 34. Which of the following descriptions matches the processes in the loop of Henle? A) It relies on countercurrent multiplication. B) It creates high interstitial NaCI concentration. C) It enables production of hypertonic urine. D) It is the site of obligatory water reabsorption. E) All of the answers are correct 35. As the filtrate passes through the renal tubules, approximately what percentage is reabsorbed and returned to the circulation? A) 1 B) 38 C) 63 D) 74 E) 99 36. Filtrate in the proximal convoluted tubule normally contains A) hydrogen ions. B) water. C) nutrients. D) urea. E) All of the answers are correct 37. Human egg and sperm are similar in that: a. about the same number of each is produced per month. b. they have the same degree of motility c. they are about the same size. d. they have the same number of chromosomes. e. All of these are correct. 38. Fertilization generally occurs in a. the uterus. b. the vagina. c. the fallopian tubes. d. the ovary 39. In the human male: a. sperm are stored in the epididymis. b. spermatogenesis occurs in the seminiferous tubules c. a vasectomy is performed to terminate the transport of sperm out of the body. d. following castration, the accessory reproductive organs decrease in size e. All of these are correct.Explanation / Answer
Que 36: Answer is E- All of the answers are correct.
I.e. filtrate in proximal convoluted tubule normally contains water, nutrients, hydrogen ion and urea. although Major portion of filtrate that enters to PCT get reabsorbed like water, Glucose, Sodium ions, amino acids, lactic acid and bicarbonate ions. because these components are important to the body and kidney wants to mantain the homeostasis. still some portion of water remains having dissolved urea, the unwanted solute and some nutrients and Hydrogen ions.
Que 35: Answer is E - 99%
Whatever amount of filtrate enters to nephrone, only about 1% actually leaves the body, Because the rest 99% is reabsorbed into the circulation.
Que 37: Answer is D
In human body, Sperm and Egg share only this similarity, they have same number of chromosomes. both structure contains Haploid set of chromosomes i.e. 23 number of chromosomes each. which on fusion during fertilization give rise to offspring with Diploid cells i.e. 46 chromosome.
Que. 38: Answer is C
In Humans Fertilization generally occurs in fallopian tube; a tube like structure that links an overy to uterus.
Que 39: Answer is E
All statements are correct.
A. Sperms are stored in Epididymis, where maturation of immature sperms occurs.
B. Spermatogenesis is the process by which sperms get produced in Seminiferous tubules of the testis.
C.Vasectomy is the surgical procedure in which the male vas deferens are cut or sealed or ligated to prevent entry of soerm into urethra and subsequent ejaculation during intercourse.
D. Castration is another mode of medical termination of pregnancy wherein testicles are either removed or deactivated by use of chemicals.
Various research have reported the atrophy i.e. shrinkage, of cells in various accessory sex organs and some other changes as well.
Hence all options are correct
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