BIO 132 UNIT 4 Exam Questions And Answers Practice Questions with Solutions Newest | Already Graded A+

BIO 132 UNIT 4 Exam Questions And Answers Practice Questions with Solutions Newest | Already Graded A+ How many daughter cells are produced from each parent cell during the entire process of meiosis? Are the cells haploid or diploid? - Answer- 4 haploid daughter cells What are the primary sex organs in the male and in the female? - Answer- Testes and ovaries What gland produces gonadotropin releasing hormone (GnRH)? - Answer- Hypothalamus Which part of the developing embryo becomes the male reproductive ducts? - Answer- Mesonephric duct What is the combined effect of testosterone and androgen binding protein on secondary sex characteristics, spermatogenesis, and libido? - Answer- Promotes spermatogenesis, increases libido, and causes development of secondary sexual characteristics What do secondary spermatocytes divide to form? - Answer- Spermatids What is the countercurrent heat exchanger that prevents arterial blood from overheating the testes? - Answer- Pampiniform plexus Which structure is cut during a vasectomy? - Answer- Ductus deferens (vas deferens) What is the entire process of sperm production from germ cells called? - Answer- Spermatogenesis What is the most important role of meiosis in sexual reproduction? - Answer- Reduction of chromosome number What are some secondary sexual characteristics in the male and female? - Answer- Hair distribution (facial hair in males), body frame, distribution of muscle and fat, development of breasts What gland produces most of the volume of semen? - Answer- Seminal vesicles What structure or barrier prevents the immune system from attacking the germ cells and sperm? - Answer- .Blood-testis barrier due to tight junctions between sustentacular cells How many chromosomes do primary spermatocytes have? How many chromosomes do spermatids have? - Answer- 46; 23 What is the name for a mature sperm cell (singular and plural forms)? - Answer- Spermatozoa (plural); spermatozoon (singular) When the outside temperature is cold, which muscle contracts and draws the testes closer to the body to keep them warm? - Answer- Cremaster Why does an enlarged prostate gland interfere with urination? - Answer- Blocks the flow of urine in the urethra Which cells produce testosterone? - Answer- Interstitial cells During the male sexual response, which part of the autonomic nervous system predominantly causes erection? - Answer- parasympathetic List the structures that the sperm travel through from the seminiferous tubule to the urethra. - Answer- Seminiferous tubules, rete testis, epididymis, ductus deferens, ejaculatory duct, urethra During spermiogenesis, what do spermatids become? - Answer- Sperm or spermatozoa Which part of the sperm contains enzymes used to penetrate the barriers surrounding the ovum? - Answer- Acrosome Does the sperm or the egg determine the genetic sex of the zygote? - Answer- sperm What is the haploid product of meiosis I called in the male? - Answer- Secondary spermatocyte Which structure is the site of sperm maturation and storage? - Answer- epididymis What causes the male climacteric? - Answer- Decreasing testosterone If the outside temperature is very hot, what would the cremaster do to allow the testicles to descend away from the body to prevent overheating? - Answer- relax Besides the cells of meiosis, what are the other cells found within the testes that promote spermatogenesis? - Answer- Sustentacular cells and interstitial cells What type of cells join together to form a zygote? - Answer- Germ cells (ova and spermatozoa) What sex chromosomes does a genetic male have and what sex chromosomes does a genetic female have? - Answer- Males: XY; Females: XX