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Questions and Answers
What is the primary function of the male reproductive system?
What is the primary function of the male reproductive system?
Which of these structures is responsible for cooling the testes to the optimal temperature for sperm production?
Which of these structures is responsible for cooling the testes to the optimal temperature for sperm production?
What is the role of the seminiferous tubules within the testes?
What is the role of the seminiferous tubules within the testes?
Which of the following is NOT a component of the spermatic cord?
Which of the following is NOT a component of the spermatic cord?
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What is the function of the corpus spongiosum within the penis?
What is the function of the corpus spongiosum within the penis?
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What term describes the loose skin covering the glans penis?
What term describes the loose skin covering the glans penis?
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What is the network of tubes located on the posterior testis that receive sperm from the seminiferous tubules called?
What is the network of tubes located on the posterior testis that receive sperm from the seminiferous tubules called?
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Which cells produce testosterone within the testes?
Which cells produce testosterone within the testes?
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What is the primary role of nitric oxide (NO) in achieving an erection?
What is the primary role of nitric oxide (NO) in achieving an erection?
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Which anatomical structure is primarily responsible for maintaining an open urethra during ejaculation?
Which anatomical structure is primarily responsible for maintaining an open urethra during ejaculation?
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What is the crucial function of the bladder sphincter during the process of ejaculation?
What is the crucial function of the bladder sphincter during the process of ejaculation?
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What is the name given to the process of reducing the chromosome number from diploid to haploid in germ cells?
What is the name given to the process of reducing the chromosome number from diploid to haploid in germ cells?
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How many nuclear divisions occur during the entirety of the process of meiosis?
How many nuclear divisions occur during the entirety of the process of meiosis?
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Which of the following describes the primary purpose of meiosis in terms of the resulting cells?
Which of the following describes the primary purpose of meiosis in terms of the resulting cells?
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What is the key difference in homologous chromosome behavior between mitosis and meiosis?
What is the key difference in homologous chromosome behavior between mitosis and meiosis?
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What is the primary role of mitosis in the body, compared to meiosis?
What is the primary role of mitosis in the body, compared to meiosis?
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Which structure serves as the initial site for sperm maturation and storage?
Which structure serves as the initial site for sperm maturation and storage?
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What is the primary function of the ductus deferens during ejaculation?
What is the primary function of the ductus deferens during ejaculation?
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A vasectomy involves severing and ligating which structure?
A vasectomy involves severing and ligating which structure?
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Which part of the male urethra passes through the prostate?
Which part of the male urethra passes through the prostate?
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Which of the following is NOT a component of the fluid released by the seminal glands?
Which of the following is NOT a component of the fluid released by the seminal glands?
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What is the role of the bulbourethral glands in the male reproductive system?
What is the role of the bulbourethral glands in the male reproductive system?
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Which condition is characterized by the enlargement of the prostate, leading to urinary difficulties?
Which condition is characterized by the enlargement of the prostate, leading to urinary difficulties?
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An elevated level of which substance in the blood serum is indicative of possible prostate cancer?
An elevated level of which substance in the blood serum is indicative of possible prostate cancer?
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What is the primary purpose of the fructose found in semen?
What is the primary purpose of the fructose found in semen?
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Which of the following is NOT a function of the seminal fluid?
Which of the following is NOT a function of the seminal fluid?
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Which of the following cells are diploid?
Which of the following cells are diploid?
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What role does the acrosome play in fertilization?
What role does the acrosome play in fertilization?
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What is the primary function of the blood-testis barrier?
What is the primary function of the blood-testis barrier?
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Which hormone directly stimulates interstitial endocrine cells to produce testosterone?
Which hormone directly stimulates interstitial endocrine cells to produce testosterone?
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In which part of the mature sperm cell would you find the mitochondria?
In which part of the mature sperm cell would you find the mitochondria?
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What is the role of androgen-binding protein (ABP) in spermatogenesis?
What is the role of androgen-binding protein (ABP) in spermatogenesis?
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Which cells are responsible for phagocytizing faulty germ cells in the seminiferous tubules?
Which cells are responsible for phagocytizing faulty germ cells in the seminiferous tubules?
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What change occurs during spermiogenesis?
What change occurs during spermiogenesis?
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Which process is directly inhibited by high sperm count?
Which process is directly inhibited by high sperm count?
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What is the name of the cell that results directly from meiosis I during spermatogenesis?
What is the name of the cell that results directly from meiosis I during spermatogenesis?
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Study Notes
Male Reproductive System
- Function: produce offspring
- Primary Sex Organs: Testes
- Produce gametes: Sperm + Sex hormones
- Production of egg (ova) + Sperm during fertilization produces fertilized egg, called a zygote
- All body cells arise from zygote by mitosis
Male Reproductive Anatomy
Scrotum
- Sac of skin and connective tissue outside abdominopelvic cavity
- Testes located inside
- Optimum temp. for sperm production is 3°C below body temperature (31°C → 34°C)
- External position away from body trunk cools the testes
- Dartos Muscle: below skin; contracts to reduce surface area of Scrotum when cold
- Cremaster Muscle: elevates testes closer to warmer body wall when cold
Testes
- Tunica Vaginalis: outer fibrous capsule enclosing testes
- Tunica Albuginea: deep fibrous layer derived from peritoneum
- Sperm production occurs in internal: Seminiferous tubules
- Organized into approximately 250 lobules which converge to form straight tubules that send sperm into the rete testis network
- Rete testis: network of tubes on posterior testis
- Sperm exit rete testis through efferent ductules and enter epididymis for storage until ejaculation
- Leydig cells: Interstitial endocrine cells surrounding the seminiferous tubules produce testosterone
- Testicular arteries: Supply blood to testes
- Pampiniform plexus: Network of veins that drains blood from testes (into testicular vein)
- Helps reduce temperature for sperm production
- Surrounds each testicular artery so that cooler venous blood leaving the testes cools the warmer arterial blood as it enters
- Spermatic cord: encloses these blood vessels and the ductus (Vas) deferens (expels sperm during ejaculation)
- and enters pelvic cavity through the inguinal canal
Penis
- Male copulatory organ
- Functions to deliver sperm to female reproductive tract
- Consists of an attached root, internal root, external body (shaft), and enlarged tip called glans penis
- Prepuce (foreskin): loose skin covering the glans penis
- May be removed after birth in circumcision
- Medical benefits of circumcision are debatable, but may reduce risk of acquiring and transmitting infection/disease
- Internal Anatomy of Penis
- Spongy urethra: Separately passes both urine + semen
Corpus Spongiosum:
- Erectile body that surrounds urethra
Corpus Cavernosa:
- two dorsal erectile bodies
Fibrous Tunica Albuginea:
- encloses the three erectile bodies
- contains vascular spaces that engorge with blood during erection
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Description
Test your knowledge about the male reproductive system with this quiz. You will explore the anatomy, functions, and physiological processes involved in male reproduction, including structures like the testes and penis. It's a detailed assessment for anyone interested in human biology.
