1.
What makes up the structures of the male genitalia?
Correct Answer(s)
A. Penis, scrotum, prostate
B. Testis, spermatic cord
C. Seminal vesicle, ejaculatory ducts
Explanation
The male genitalia are composed of various structures that play different roles in reproduction and sexual function. The penis is the external organ responsible for sexual intercourse and urination. The scrotum is a pouch of skin that holds and protects the testes, which produce sperm and male sex hormones. The prostate gland is a walnut-sized gland that produces fluid that nourishes and protects sperm. The spermatic cord is a structure that contains blood vessels, nerves, and the vas deferens, which carries sperm from the testes to the urethra. The seminal vesicles produce seminal fluid that mixes with sperm to form semen, and the ejaculatory ducts transport semen from the seminal vesicles to the urethra.
2.
The purpose of the male genitalia organ system is to?
Correct Answer
C. Produce, nourish, and transport
Explanation
The male genitalia organ system serves multiple purposes. It is responsible for the production of sperm, which is essential for reproduction. Additionally, it produces seminal fluid that nourishes and protects the sperm during ejaculation. The system also plays a role in transporting the sperm and the seminal fluid through the reproductive tract during sexual intercourse. Therefore, the correct answer is "Produce, nourish, and transport."
3.
A cylindrical organ that is attached to the perineum by what?
Correct Answer
A. Bucks fascia and suspensory ligament
Explanation
The correct answer is Bucks fascia and suspensory ligament. The question is asking about the attachment of a cylindrical organ to the perineum. Bucks fascia and suspensory ligament are the structures that attach the organ to the perineum.
4.
The Penile body contains 3 cylindrical structures?
Correct Answer
A. True
Explanation
The penile body contains three cylindrical structures known as the corpora cavernosa and the corpus spongiosum. The corpora cavernosa are located on the upper side of the penis and are responsible for the majority of the erectile tissue. The corpus spongiosum is located on the underside of the penis and surrounds the urethra. These structures fill with blood during arousal, causing the penis to become erect. Therefore, the statement "The Penile body contains 3 cylindrical structures" is true.
5.
The three structures of the penile body are all erectile tissue?
Correct Answer
A. True
Explanation
The penile body consists of three structures known as the corpora cavernosa and the corpus spongiosum. These structures are made up of erectile tissue, which allows the penis to become erect during sexual arousal. Therefore, it is correct to say that all three structures of the penile body are erectile tissue.
6.
The Corpus Spongiosum is two of these parts (see prior question)
Correct Answer
B. False
Explanation
The Corpus Spongiosum is not two parts, but rather one part of the male reproductive system. It is a spongy tissue that surrounds the urethra and helps to maintain the rigidity of the penis during an erection.
7.
The three structures of the penile body are divided into two types.
Correct Answer
A. True
Explanation
The statement is true because the penile body is indeed divided into three structures, which are the two corpora cavernosa and the corpus spongiosum. The corpora cavernosa are two cylindrical bodies located on the upper side of the penis, while the corpus spongiosum is a single structure that surrounds the urethra on the underside of the penis. These structures play a crucial role in the process of erection and are responsible for the rigidity and enlargement of the penis during sexual arousal.
8.
These two types of erectile tissue are?
Correct Answer
C. 1 Corpus spongiosum and 2 corpora cavernosa
Explanation
The correct answer is 1 Corpus spongiosum and 2 corpora cavernosa. The corpus spongiosum is a single erectile tissue that surrounds the urethra and helps to maintain its patency during erection. The corpora cavernosa, on the other hand, are two erectile tissues that run along the length of the penis and are responsible for the majority of penile rigidity during erection.
9.
The Corpus spongiosum houses what?
Correct Answer
B. Urethra
Explanation
The corpus spongiosum is a spongy tissue that surrounds the urethra in the penis. It helps to maintain the urethra open during erection and allows the passage of urine and semen through the urethra. Therefore, the correct answer is urethra.
10.
The Corpus spongiosum exists to hold the urethra open, why?
Correct Answer
A. To allow proper ejaculation
Explanation
The Corpus spongiosum is a spongy tissue in the penis that surrounds the urethra. Its main function is to keep the urethra open during sexual arousal and ejaculation. This allows for the passage of semen through the urethra and out of the body. Without the Corpus spongiosum, the urethra could collapse or become constricted, hindering the proper flow of semen during ejaculation. Therefore, its presence is crucial for facilitating proper ejaculation.
11.
What is significantly enlarged during tumescence?
Correct Answer
D. Both corpora cavernosa
Explanation
During tumescence, both corpora cavernosa are significantly enlarged. The corpora cavernosa are two cylindrical structures located within the penis that fill with blood during an erection, causing the penis to become larger and firmer. This enlargement is essential for sexual arousal and intercourse.
12.
What is the tissue surrounding the body of the penis?
Correct Answer
B. Tunica albuginea
Explanation
The correct answer is tunica albuginea. The tunica albuginea is a tough, fibrous tissue that surrounds the body of the penis. It helps to maintain the shape and rigidity of the penis during an erection. The tunica albuginea is responsible for trapping blood within the erectile tissues of the penis, allowing for the maintenance of an erection.
13.
The distal end of the corpus spongiosum is known as what?
Correct Answer
B. Glans penis
Explanation
The distal end of the corpus spongiosum is known as the glans penis. The glans penis is the rounded, bulbous structure located at the tip of the penis. It is highly sensitive and plays a crucial role in sexual stimulation.
14.
The margin of the Glans penis is called what?
Correct Answer
C. Corona
Explanation
The margin of the Glans penis is called the corona. The corona refers to the rounded ridge or edge that separates the glans from the shaft of the penis. It is a distinct anatomical feature that can be easily observed.
15.
The terminal slit at the end of the glans penis is known as?
Correct Answer
A. External urethral orifice
Explanation
The terminal slit at the end of the glans penis is known as the external urethral orifice. This is the opening through which urine and semen are expelled from the body during urination and ejaculation.
16.
What covers the glans penis?
Correct Answer(s)
B. Foreskin
C. Prepuce
Explanation
The correct answer is foreskin, prepuce. The foreskin, also known as the prepuce, covers the glans penis. It is a retractable fold of skin that protects and covers the sensitive head of the penis. It serves to keep the glans moist, provide protection, and enhance sexual pleasure.
17.
What is the foreskin/prepuce formed from?
Correct Answer
A. The penile skin
Explanation
The foreskin, also known as the prepuce, is formed from the penile skin. It is a retractable fold of skin that covers the head of the penis in males. The penile skin extends to form the foreskin, providing protection and sensitivity to the glans penis. The clitoris, on the other hand, is a female sexual organ and is not related to the formation of the foreskin.
18.
What are the functions of the penis?
Correct Answer(s)
A. Passageway for semen
B. Excretion of urine
C. Sexual organ
Explanation
The penis serves multiple functions. It acts as a passageway for semen during ejaculation, allowing the sperm to be transported from the testes to the female reproductive system. Additionally, it is involved in the excretion of urine, allowing the elimination of waste products from the body. Furthermore, the penis is a sexual organ, playing a crucial role in sexual arousal, intercourse, and reproduction.
19.
What dilates, and what constricts during a erection?
Correct Answer
D. Penile arteries, veins
Explanation
During an erection, the penile arteries dilate, meaning they expand in diameter to allow more blood flow into the penis. This increased blood flow is essential for achieving and maintaining an erection. On the other hand, the veins in the penis constrict, meaning they narrow, to prevent blood from leaving the penis too quickly. This combination of dilated arteries and constricted veins helps to trap blood in the penis, resulting in a firm erection.
20.
Why do the veins constrict?
Correct Answer
C. To slow blood outflow
Explanation
The veins constrict in order to slow down the outflow of blood. This constriction helps in maintaining blood pressure and preventing excessive blood loss. When the veins constrict, the diameter of the blood vessels decreases, which reduces the volume of blood flowing out of them. This mechanism is particularly important in situations where the body needs to conserve blood, such as during injury or hemorrhage. By slowing down the outflow of blood, the veins assist in maintaining a stable circulation and preventing hypovolemia.
21.
What is an emission?
Correct Answer
C. A small discharge of semen, may happen at night
Explanation
The correct answer is "a small discharge of semen, may happen at night". This refers to the release of a small amount of semen, which can occur during ejaculation or nocturnal emissions (also known as "wet dreams"). It is a normal physiological process that can happen to males during puberty and adulthood.
22.
What causes an emission?
Correct Answer(s)
A. Contractions of the vas deferens
B. Contractions of the seminal vesicles
C. Contractions of the ejaculatory ducts
D. Contractions of the prostate
23.
Can Emissions happen while you sleep?
Correct Answer
A. Yes
Explanation
Emissions can occur while sleeping due to various factors. During sleep, our bodies continue to perform essential functions such as breathing and digestion. These processes can produce emissions such as carbon dioxide and methane. Additionally, emissions can also occur from sources in our surroundings, such as appliances or vehicles, which may continue to operate while we sleep. Therefore, it is possible for emissions to happen while sleeping.
24.
What is the Raphe?
Correct Answer
B. A line marking the separation of the two hemiscrotums
Explanation
The raphe is a line that marks the separation of the two hemiscrotums. This line is present in males and is formed during embryonic development. It is a visible ridge that extends from the anus to the underside of the penis, dividing the scrotum into two halves. The raphe is a normal anatomical feature and does not cause any health issues.
25.
The Scrotal sac is divided by a septum called the scrotal septum and it is composed of what?
Correct Answer
A. Dartos muscle
Explanation
The scrotal sac is divided by a septum called the scrotal septum, and it is composed of the dartos muscle. The dartos muscle is a layer of smooth muscle fibers that surrounds the scrotum and helps regulate the temperature of the testicles by contracting and relaxing. It also aids in the movement and positioning of the testicles. The dartos fascia and scrotal tissue are also present in the scrotal sac, but they do not specifically divide the sac like the dartos muscle does. The raphe is a line of tissue that runs along the scrotum, but it does not divide the sac either.
26.
What does the dartos muscle do?
Correct Answer
C. A and b
Explanation
The dartos muscle is responsible for both contracting and wrinkling the skin of the scrotum and elevating the testis. When the muscle contracts, it causes the skin of the scrotum to wrinkle, which helps regulate the temperature of the testes by adjusting their proximity to the body. Additionally, the contraction of the dartos muscle aids in elevating the testis, which helps protect them from injury and allows for proper sperm production. Therefore, the correct answer is a and b.
27.
Functions of the scrotum are which of the following?
Correct Answer(s)
A. Housing and support for testes
B. Houses spermatic cord and epididymis
C. Regulates temp of testes
Explanation
The scrotum functions to provide housing and support for the testes, as well as to house the spermatic cord and epididymis. It also plays a role in regulating the temperature of the testes, which is important for sperm production and overall reproductive function.
28.
How long is a testis?
Correct Answer
B. 5cm
Explanation
The testis is an organ found in the male reproductive system. It is responsible for producing sperm and hormones. The average size of a testis is around 5cm. This size can vary slightly among individuals, but 5cm is a generally accepted measurement.
29.
How wide is a testis?
Correct Answer
A. 2.5cm
Explanation
The width of a testis is typically around 2.5cm.
30.
Which testis is often lower?
Correct Answer
B. Left
Explanation
The left testis is often lower because of anatomical differences. The left testis usually descends lower than the right testis during fetal development. This is due to the position of the left testicular vein, which is longer and enters the left renal vein at a higher point. As a result, the left testis is pulled downwards, causing it to be lower than the right testis in most individuals.
31.
Is a white fibrous structure covering the testicle, divides the testes into 200-300 lobules containing seminiferous tubules
Correct Answer
B. Tunica albuginea
Explanation
The correct answer is tunica albuginea. The tunica albuginea is a white fibrous structure that covers the testicle and divides it into lobules. These lobules contain seminiferous tubules, which are responsible for the production of sperm. The tunica albuginea provides support and protection to the testicle, and it also helps to maintain the shape and structure of the testes.
32.
Forms a fibrous sac encasing the testis?
Correct Answer
A. Tunica vaginalis
Explanation
The tunica vaginalis is a serous membrane that covers the testis and forms a fibrous sac around it. It helps to protect and support the testis. The tunica albuginea, on the other hand, is a dense fibrous capsule that lies beneath the tunica vaginalis and provides structural support to the testis. However, it does not form a fibrous sac encasing the testis like the tunica vaginalis does. Therefore, the correct answer is Tunica vaginalis.
33.
Is a system of blood vessels that provide nourishment to seminiferous tubules and interstitial cells
Correct Answer
A. Tunica vasculosa
Explanation
The tunica vasculosa is a system of blood vessels that provides nourishment to the seminiferous tubules and interstitial cells. It is responsible for delivering oxygen and nutrients to these structures, allowing them to function properly. Without the tunica vasculosa, the seminiferous tubules and interstitial cells would not receive the necessary nourishment, leading to impaired reproductive function.
34.
A small pedunculated body located on the upper pole of the testes
Correct Answer
A. Appendix testis
Explanation
The correct answer is appendix testis. The appendix testis is a small pedunculated body located on the upper pole of the testes. It is a vestigial structure that is derived from the Mullerian duct and is present in some males. It is believed to have no significant function and is often mistaken for a testicular tumor.
35.
Where are Leydig cells located?
Correct Answer
A. Between the seminiferous tubules
Explanation
Leydig cells are located between the seminiferous tubules in the testes. These cells are responsible for producing testosterone, a hormone that plays a crucial role in male sexual development and function. By being situated between the seminiferous tubules, Leydig cells are strategically positioned to support and regulate the process of spermatogenesis, which occurs within the tubules.
36.
Leydig cells secrete what?
Correct Answer
B. Testosterone
Explanation
Leydig cells are located in the testes and their main function is to produce and secrete testosterone. Testosterone is a male sex hormone that plays a crucial role in the development and maintenance of male reproductive tissues, including the testes and prostate. It also promotes secondary sexual characteristics such as muscle growth, facial and body hair, and deepening of the voice. Therefore, it is correct to say that Leydig cells secrete testosterone.
37.
The Functional unit of the testes is?
Correct Answer
B. Seminiferous tubules
Explanation
The seminiferous tubules are the functional units of the testes. These tubules are responsible for the production of sperm through a process called spermatogenesis. They are lined with specialized cells called Sertoli cells, which support and nourish the developing sperm cells. The seminiferous tubules also contain Leydig cells, which produce testosterone, a hormone essential for the development and maintenance of male reproductive organs and secondary sexual characteristics. Therefore, the seminiferous tubules play a crucial role in the production of sperm and the regulation of male reproductive functions.
38.
The functional unit of the testes constitutes approximately___ of the testicular mass
Correct Answer
B. 75%
Explanation
The functional unit of the testes refers to the seminiferous tubules, where sperm production occurs. These tubules make up the majority of the testicular mass. Since the question asks for the approximate percentage, the correct answer of 75% indicates that the seminiferous tubules constitute a significant portion of the testes.
39.
What two types of cells does the functional unit have?
Correct Answer(s)
A. Sertoli cells
B. Spermatogenic cells
Explanation
The functional unit referred to in the question is most likely the seminiferous tubule, which is the site of sperm production in the testes. Sertoli cells are essential for supporting and nourishing the developing sperm cells, while spermatogenic cells are the cells that undergo meiosis and differentiation to form mature sperm cells. Therefore, both Sertoli cells and spermatogenic cells are present in the functional unit of the seminiferous tubule. Epidermal cells are not involved in sperm production and spermatids are the immediate precursors to sperm cells, not distinct cell types.
40.
Spermatogonia is?
Correct Answer
A. The most primitive form of germ cell, lying dormant until puberty
Explanation
Spermatogonia refers to the most primitive form of germ cells in males. These cells remain dormant until puberty, when they begin the process of spermatogenesis, leading to the production of sperm. This explanation clarifies that spermatogonia are not the least primitive form of germ cells and are not related to kidney evolution.
41.
What do spermatogenic cells do?
Correct Answer
C. Produce sperm
Explanation
Spermatogenic cells are responsible for producing sperm. These cells undergo a process called spermatogenesis, which involves the development and maturation of sperm cells. Through this process, spermatogenic cells produce and release mature sperm cells that are capable of fertilizing an egg during sexual reproduction. Therefore, the correct answer is "produce sperm."
42.
What do sertoli cells do?
Correct Answer
A. Provide nourishment for the maturing germ cells
Explanation
Sertoli cells are specialized cells found in the testes that play a crucial role in supporting the development and maturation of sperm cells. They provide nourishment to the developing germ cells by supplying them with essential nutrients and removing waste products. This nourishment is essential for the proper growth and maturation of sperm cells, ensuring their viability and functionality. Sertoli cells also create a protective environment for the developing germ cells and help in regulating the process of spermatogenesis. Therefore, their main function is to provide nourishment and support for the maturing germ cells.
43.
Germ cells undergo maturation first to primary and then to secondary?
Correct Answer
A. Spermatocytes
Explanation
Germ cells undergo maturation first to primary and then to secondary spermatocytes. This process occurs during spermatogenesis, the process of sperm cell development. Spermatocytes are the intermediate stage between germ cells and spermatids. After maturation, secondary spermatocytes further divide to form spermatids, which eventually develop into fully mature sperm cells. Therefore, spermatocytes are the correct answer as they are the stage that follows the maturation of germ cells.
44.
Spermatocytes turn into
Correct Answer
A. Spermatids
Explanation
Spermatocytes are the cells in the testes that undergo meiosis to produce spermatids. Spermatids are immature sperm cells that still need to undergo further maturation before they can fertilize an egg. Therefore, the correct answer is spermatids.
45.
Spermatids turn into?
Correct Answer
A. Mature sperm
Explanation
Spermatids are immature male germ cells that undergo a process called spermiogenesis to develop into mature sperm. During spermiogenesis, spermatids undergo structural and functional changes, including the formation of a head, midpiece, and tail. These changes enable the spermatids to acquire the ability to swim and fertilize an egg. Therefore, the correct answer is "mature sperm."
46.
The two functions of the testicles are?
Correct Answer
A. Production of sperm and testosterone
Explanation
The testicles have two main functions: the production of sperm and the production of testosterone. Sperm production occurs within the seminiferous tubules of the testicles, while testosterone is produced by specialized cells called Leydig cells. Testosterone is a hormone that plays a crucial role in the development of male reproductive organs, secondary sexual characteristics, and overall sexual function. Therefore, the correct answer is the production of sperm and testosterone.
47.
The comma shaped structure attached to the posterior border of each testis is?
Correct Answer
B. Epididymis
Explanation
The comma-shaped structure attached to the posterior border of each testis is the epididymis. The epididymis is responsible for storing and maturing sperm cells before they are transported to the vas deferens for ejaculation. It plays a crucial role in the reproductive system by providing a suitable environment for sperm to develop and gain motility.
48.
Epididymis provides for?
Correct Answer(s)
A. Maturation of sperm
B. Storage
C. Transportation of sperm
Explanation
The epididymis is a coiled tube located on the back of each testicle that serves multiple functions. It is responsible for the maturation of sperm, allowing them to become fully motile and capable of fertilization. The epididymis also acts as a storage site for sperm, where they can be stored for several weeks until ejaculation occurs. In addition, the epididymis aids in the transportation of sperm, helping to propel them from the testicles to the vas deferens during ejaculation.
49.
What is the Vas deferens?
Correct Answer(s)
B. A tube connecting the epididymis and the ejaculation duct
C. Transports sperm
D. Stores sperm
Explanation
The Vas deferens is a tube that connects the epididymis (where sperm is stored and matures) to the ejaculation duct. It is responsible for transporting sperm from the testis to the urethra during ejaculation. Additionally, the Vas deferens also has the ability to store sperm for a certain period of time before ejaculation occurs.
50.
Consisting of the following parts is what? vas deferens, testicular
artery, autonomic nerves, veins that drain the testes and carry
testosterone into circulation, lymphatic vessels and the cremaster
muscle
Correct Answer(s)
spermatic cord
Explanation
The spermatic cord is a structure consisting of various parts including the vas deferens, testicular artery, autonomic nerves, veins that drain the testes and carry testosterone into circulation, lymphatic vessels, and the cremaster muscle. It is responsible for connecting the testes to the rest of the reproductive system in males.