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A&P II: Reproductive
Mod 6
| Question | Answer |
|---|---|
| 4 duct that serve as passageways for sperm: epididymus, ejaculatory duct, ductus deferens, & | urethra |
| external male genitalia | penis & scrotum |
| male gonads that produce male sperm and male sex hormone | testes |
| part of testes where sperm are produced | seminiferous tubules |
| cells that produce testosterone | Leydig |
| cells that support spermatogenesis, providing sperm nutrition and secreting inhibin and androgen-binding protein | Sertoli |
| where do testes develop in the male fetus? | near the kidneys |
| when testes descend during embryologic development from near the kidneys to the scrotum, what do they pass through? | inguinal canals |
| why is complete descent of the testes necessary for normal sperm development? | too hot in body for sperm |
| spermatic cord contain: ductus deferens, testicular artery, veins, autonomic nerves, lymphatic vessels and | cremaster muscle |
| structure supporting the male reproductive system formed when testes descend from the posterior abdomen | spermatic cord |
| Highly coiled tube located in the scrotum, site of final sperm maturation. | epididymus |
| ductus (vans)deferens, ejaculatory duct, epididymus are all paired/unpaired passageways | paired |
| The ________ ____ passes through the prostate in males. | ejaculatory duct |
| vasectomy site | ductus deferens |
| seminiferous tubules -> epididymus -> vas deferens -> | urethra |
| sperm cells + seminal fluid = | semen |
| paired glands: bulbourethral glands and | seminal vesicles |
| male sex gland that secretes mucus | bulbourethral gland |
| seminal vesicle empty into/come from the ejaculatory duct | empty into |
| bulbourethral glands and seminal vesicles secrete | alkaline fluid |
| glands add scretions to semen: seminal vesicles -> | bulbourethral glands |
| circumcision removes the (foreskin) | prepuce |
| male erection stimulus receptors | skin around and on the genitals |
| male erection central integration center | sacral spinal cord |
| male erection efferent pathway | parasympathetic fibers release nitrous oxide (NO) |
| male erection effector and reflex response | smooth muscles relax which dilates blood vessels |
| primarily a vascular response in penis (parasympathetic NS) | erection |
| primarily a muscular response in penis (sympathetic NS) | ejaculation |
| cytoplasmic changes that make structurally mature sperm cells; conversion of sprematids to spermatozoa | spermiogenesis |
| mature sperm | spermatozoa |
| 46 to 23 | meiosis |
| secondary spermatocytes and ________ have 23 chromosomes by meiosis | spermatids |
| stem cells | spermatogonia |
| LH stimulates _________ production | testosterone |
| anabolic steriods act like/inhibit testosterone | act like |