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Male Rep Syst
Ch 10 Reproductive System: Male Rep Syst p452 #1-26
| Question | Answer |
|---|---|
| The primary male sex organ, or________, are the _______ | Gonads; Testes |
| List the pathway of sperm from the primary sex organs thru the penis | Sperm produced in the testes travel along a system of ducts- The epidymis, vas deferens, Ejaculatory duct to reach the urethra, which ends in the penis (System of ducts-epidymis, vas deferens, ejaculatory urethra penis) |
| Name the accessory sex glandsWhat is their function? | Seminal vescicles, Prostate, Bulbourthral glands; They secrete substances that form semen |
| Describe the location of the testes. How does the temperature there compare to core body temperature? Why? | within the scrotum; The temp must be 3 degrees C below core body temp; for optimal sperm production |
| How is the temperature of the testes regulated? What muscles are involved? What are the actions of theses muscles when the temperature is too warm and too cold ? | by changing the position of the testes within the scrotum and decreasing the temp of blood reaching the testes; cremaster muscle & dartos muscle; When Cold- cremaster muscle- contracts to draw the testes closer to the body for warmth & dartos muscle (of |
| Describe the counter-current heat exchange mechanism. What effect does this mechanism have on the arteriole blood temperature as it reaches the testes? | Blood in testicular artery transfers some of it heat to cooler blood flowing in the opposite direction thru the pampiniform venous plexus; It is cooler that core body temp |
| The testes are the site of what events? | spermatogenisis (sperm development) & production of male sex hormones or androgens |
| Name the two connective tissue coats of the testes? | inner tunica albuginea & an outer tunica vaganilis |
| Internally, the testes are divided into_______ wedge-shaped_________. Each _________contains up to _______ ducts called ________. What occurs in these ducts? | 250-300; lobules; Lobule; 3; seminiferous tubules; Spermatogenisis occurs |
| What is equivalent to the combined length of these ducts in both testes? | to almost 15 football fields |
| How many sperm are in the average ejaculation? | one-half billion |
| Describe the epithelium that lines the seminiferous tubule? | composed of several layers of germ cells in process of becoming sperm and sustentacular cells that facilitate the development of sperm cells |
| Name the cells responsible for testosterone production? Where are they located? | Interstitial (or Leydig; found between adjacent seminiferous tubules |
| Describe the pathway of the sperm as they leave the seminiferous tubule, matured and are stored. | they leave the testes thru the rete testis and efferent ductules to enter the head of the epidydimis; they are matured as they travel thru the head and body of the epidydimus; they are stored in its tail until ejaculation |
| How many sperm form each day? | up to 60 million |
| What structure is continuous with the tail of the epidymis? Where is this structure located? | vas deferens (ductus deferens); this tubule leaves the scrotum in the spermatic cord and enters the pelvic cavity and terminates posterior to the urinary bladder |
| The _________ joins the duct of the _______to form the _______, which passes through the ________to empty into the ________ part of the ___________ | vas deferens; seminal vesicle; ejaculatory duct; prostate; prostatic; urethra |
| Name the accessory gland that produces 60% of the semen volume.Describe the secretion produced | Seminal Vescicles; Alkaline secretions |
| Name the accessory gland that produces 30% of the semen volume. Describe the secretion produced. | Prostate; milky slightly acidic secretion |
| Name the asscessory gland that produces mucus that neutralizes the acidic urethra. What percent of the total semen volume consists of this fluid? | Bulbourethral glands; 5% |
| What are the dual functions of the penis? | it contains the lower urinary tracts; and is the male organ of copulation |
| What are the divisions of the penis? | Root; shaft (body); glans (the tip) |
| Describe the erectile bodies of the penis. | a bulb and a left and right crus |
| Which structure encloses the spongy urethra? What is the terminal end of this structure? | the bulb and corpus spongiosum; ends in the glans at the external urethral orfice |
| How is the size and shape of the penis determined? | by the erectile tissue (a network of venous spaces) |
| What events occure in the process of an erection? | erectile tissue fills with blood |
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salonge1010
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