Reproductive System 100% Verified Questions And Answers Graded A

Reproductive System 100% Verified Questions And Answers Graded A Reproductive System is involved in homeostasis - false Reproductive system in males and females Gametes: males produce _________ in ___________, females produce ___________ in _______________ - sperm, testes eggs (ova), ovaries Reproductive system in males and females Males transport sperm in ________; females transport eggs in _________ ___________ to _________ - ducts, uterine tubes, uterus Reproductive system in males and females Uterus allows fertilized egg to ________ - develop Reproductive system in males and females After birth, breasts provide ____________ - nourishment Reproductive system in males and females Testes and ovaries produce sex hormones: - testosterone (males) estrogen, progesterone (females) Mitosis happens in every other cell - True Meiosis only happens in - reproduction DNA - 46 chromosomes within nucleus of most body cells 23 pairs; each pair has one chromosome from each parent During most of life cycle, cells divide by ________ - mitosis duplication division is - each cell exiting mitosis has same 46 chromosomes cells produce exact copies of the 46 , so there's two sets of 46 chromosomes Mitosis is used for _____________, ___________ of damaged tissue - growth, repair Meiosis: - cell division for reproduction Meiosis only in gonads: ________________ and ______________ - spermatogenesis, oogenesis Meiosis reduction divison, - chromosomes reduce from 46 (diploid, 2n) to 23 (haploid, n) 23 pairs chromosomes there's - 22 pairs autosomal 1 pair sex chromosomes Meiosis two successive divisions = - meiosis I and meiosis II = forms gametes starts with diploid, then replicates to 46 pairs, then they divide and you have two sets of 23 pairs, then you have 4 haploid (23) Testes - male gonades (primary sex organs) Scrotum - sperm mature epididymis - sperm mature vas deferens - passes sperm into ejaculatory duct -- urethra sperm leave penis in __________ - semen Semen produce by 2 ____________ _________, _________ __________, 2__________ __________ - seminal vesicles, prostate gland, bulbourethral glands The seminal vesicles will secrete 60% of the fluid as the sperm is going through and it will "tag along" Male Reproductive System sperm slightly basic (pH ~7.5) Fructose as ________ _______ Prostaglandins in sperm helps... 400 million sperm in ~3.5 ml semen each ejaculation - energy source uterus contract Testes Begin development in ________________ ____________, descend into _______ last 2 months fetal development - abdominal cavity, scrotum Testes If testes don't descend into scrotum, _______ can result =. internal body temperature too _____ to produce viable sperm - sterility, high Seminiferous tubules Testes have compartments called ________, contain _______ _________ Spermatogenesis- - lobules, seminiferous tubules production of sperm Spermatogenesis Spermatogonia divide into _______ ____________ (2n), undergo ________ , into ______________ _________ (n) - primary spermatocytes, meiosis I, secondary spermatocytes Spermatogonia (2n) - start the sperm creation Spermatogenesis Secondary spermatocytes undergo ______________ = four _________ (n, 23 chromosomes) - meiosis II, spermatids Spermatogenesis Spermatids develop into _______ with tails - sperm Spermatogenesis Sertoli cells -- - support, nourish, regulate spermatogenesis Spermatogenesis takes - 74 days to develop from spermatogonia to sperm Sperm (spermatozoa) have three parts - head, midpiece, tail Mitochondria in ________ of tail provide energy for movement of tail (flagellum) - midpiece Head contains nucleus covered by _______, which contains enzymes needed to penetrate the egg - acrosome Interstitial Cells between seminiferous tubules Produce male sex hormones (________________) most important androgen = __________________ - androgens testosterone Hormonal regulation male reproduction: Hypothalamus secretes _______ GnRH stimulates secretion ________ and _______ from anterior pituitary gland - GnRH FSH, LH FSH promotes - sperm production LH stimulates ____________ production - testosterone testosterone acts as a _______ feedback = maintains fairly constant production sperm and testosterone - negative Testosterone-- normal development and functioning of male sex organs male secondary sex characteristics ... - main male sex hormone develop at puberty