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Anatomy & Physiology: Urinary and Reproductive Systems

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  • What is the function of Bowman's capsule in the nephron?

    Filtration of blood plasma occurs in Bowman's capsule; it is the first step in urine formation.

  • What hormone is involved when producing a small volume of urine?

    Antidiuretic hormone (ADH) is involved; it causes water reabsorption, reducing urine volume.

  • What happens hormonally when producing a large volume of urine?

    Low or absent ADH leads to less water reabsorption, increasing urine volume.

  • How many spermatids does one primary spermatocyte produce?

    One primary spermatocyte produces four spermatids after meiosis.

  • What is the chromosome number at each stage of spermatogenesis?

    Primary spermatocytes have 46 chromosomes, secondary spermatocytes have 23 chromosomes, and spermatids have 23 chromosomes.

  • What are the main functions of the ovaries?

    Ovaries produce oocytes, secrete inhibin, estrogen, and progesterone, and are the site of follicle development.

  • Describe the path sperm travels from formation to ejaculation.

    Sperm is made in seminiferous tubules → straight tubule → rete testis → efferent ductule → epididymis → vas deferens → ampulla → seminal gland → ejaculatory duct.

  • What occurs during prophase I of meiosis in male and female gamete formation?

    Formation of a tetrad with crossing over and synapsis of homologous chromosomes.

  • Besides the kidney, which other systems contribute to detoxification?

    Urinary, digestive, integumentary, and respiratory systems also play roles in detoxification.

  • What are the main parts of the urinary system?

    Kidneys, ureters, urinary bladder, and urethra.

  • How does atrial natriuretic peptide (ANP) affect sodium and water balance?

    ANP causes excretion of Na+ and retention of K+, leading to increased water excretion and decreased blood volume.

  • What happens if there is an excess or absence of ADH?

    Excess ADH causes water retention and low urine volume; absence causes excessive urine output and dehydration risk.

  • What is the role of the juxtaglomerular (JG) apparatus?

    It regulates blood volume and pressure by sensing sodium, chloride, and water levels and secreting renin.

  • What is the function of the peritubular capillary network?

    It surrounds renal tubules and facilitates reabsorption and secretion between blood and filtrate.

  • What gives urine its characteristic color?

    Urochrome, a breakdown product of hemoglobin metabolism, gives urine its yellow color.

  • What do nurse cells in the testes secrete and what is their secondary function?

    Nurse cells secrete inhibin and form the blood-testis barrier to protect developing sperm.

  • What is oogenesis and when is the second polar body produced?

    Oogenesis is the formation of female gametes; the second polar body is produced after fertilization to reduce chromosome number.

  • What components make up semen?

    Semen is sperm plus fluids from the seminal vesicles, prostate gland, and Cowper's gland.

  • What are the layers of the uterus?

    The uterus has three layers: endometrium, myometrium, and perimetrium.

  • Where does fertilization typically occur in the female reproductive tract?

    Fertilization usually occurs in the ampulla of the fallopian tube.

  • What is the role of the acrosome in sperm?

    The acrosome contains enzymes that help sperm penetrate the egg's cell membrane during fertilization.

  • What is the menstrual cycle composed of?

    The menstrual cycle includes the uterine cycle and the ovarian cycle, regulated by hormones.

  • What is spermiogenesis?

    Spermiogenesis is the final stage of sperm development where spermatids mature into motile sperm.

  • What are the parts of the spermatic cord?

    The spermatic cord contains the vas deferens, blood vessels, nerves, and lymphatics supplying the testes.

  • What is the difference between defecation and urination?

    Defecation is the release of fecal material; urination is the release of urine.

  • What substances should not be present in the initial filtrate of the nephron?

    Large proteins and blood cells should not be present in the initial filtrate.

  • What is the most abundant organic waste in urine?

    Urea is the most abundant organic waste in urine.