Reproductive System Book Questions
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chapter challenge
Questions and Answers
- 1.
The cremaster muscle is found in the
- A.
Scrotum and spermatic cord
- B.
Bladder
- C.
Oviduct wall
Correct Answer
A. Scrotum and spermatic cordExplanation
The cremaster muscle is found in the scrotum and spermatic cord. The cremaster muscle is responsible for regulating the position of the testicles within the scrotum. It contracts to pull the testicles closer to the body in order to regulate temperature and protect the sperm. This muscle is important for maintaining the optimal conditions for sperm production and function.Rate this question:
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- 2.
Sperm are produced by the
- A.
Seminiferous tubules
- B.
Seminal vesicles
- C.
Prostate gland
Correct Answer
A. Seminiferous tubulesExplanation
Sperm are produced by the seminiferous tubules, which are located in the testes. These tubules are responsible for the production and maturation of sperm cells through a process called spermatogenesis. The seminiferous tubules are lined with specialized cells called Sertoli cells, which support and nourish the developing sperm cells. The seminal vesicles and prostate gland, on the other hand, contribute to the production of seminal fluid, which is necessary for the transportation and nourishment of the sperm. However, they do not directly produce sperm cells.Rate this question:
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- 3.
Which of the following cells divides by mitosis
- A.
Spermatogonia
- B.
Primary spermatocytes
- C.
Spermatids
Correct Answer
A. SpermatogoniaExplanation
Spermatogonia divide by mitosis. Mitosis is the process of cell division that results in the production of two identical daughter cells, each with the same number of chromosomes as the parent cell. Spermatogonia are the germ cells in the testes that undergo mitosis to produce primary spermatocytes, which then undergo meiosis to produce spermatids. Therefore, spermatogonia are the cells that divide by mitosis in the given options.Rate this question:
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- 4.
From anterior to posterior, the femal perineal orifices are the
- A.
Urethra, vagina, anus
- B.
Urethra anus, vagina
- C.
Anus, urethra vagina
Correct Answer
A. Urethra, vagina, anusExplanation
The correct answer is urethra, vagina, anus. The female perineal orifices are arranged from anterior to posterior, meaning that the urethra is the most anterior opening, followed by the vagina, and finally the anus. This arrangement is anatomically correct and reflects the normal positioning of these structures in the female perineum.Rate this question:
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- 5.
Luteinizing hormone stimulates
- A.
Testosterone release
- B.
Ovulation
- C.
Progesterone release
- D.
All of them are right
Correct Answer
D. All of them are rightExplanation
Luteinizing hormone (LH) is responsible for stimulating various processes in the body. It plays a crucial role in the release of testosterone, a hormone that is essential for male reproductive function. LH also triggers ovulation in females, where the mature egg is released from the ovary. Additionally, LH stimulates the release of progesterone, a hormone that is important for maintaining pregnancy. Therefore, all of the given options are correct as LH stimulates testosterone release, ovulation, and progesterone release.Rate this question:
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- 6.
Which of the following is not part of the uterus?
- A.
Cervical os
- B.
Introitus
- C.
Myometrium
Correct Answer
B. IntroitusExplanation
The introitus is not part of the uterus. The introitus refers to the external opening of the vagina, while the uterus is a reproductive organ located in the pelvis. The uterus consists of various parts, including the cervical os (the opening of the cervix) and the myometrium (the muscular layer of the uterus). However, the introitus is not a component of the uterus itself.Rate this question:
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- 7.
Which uterine layer is lose each month as a woman menstruates
- A.
The myometrium
- B.
The entire endometrium
- C.
The stratum functionalis
- D.
The stratum basalis
Correct Answer
C. The stratum functionalisExplanation
The stratum functionalis is the correct answer because it is the layer of the endometrium that is shed during menstruation. This layer is responsible for supporting the implantation of a fertilized egg, and if pregnancy does not occur, it is no longer needed and is shed along with blood during menstruation. The myometrium is the middle layer of the uterus responsible for uterine contractions, while the stratum basalis is the layer that remains after menstruation and gives rise to a new stratum functionalis.Rate this question:
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- 8.
The first polar body is a daughter cell of the
- A.
Primary oocyte
- B.
Secondary oocyte
- C.
Ovum
Correct Answer
A. Primary oocyteExplanation
The first polar body is a daughter cell of the primary oocyte. During oogenesis, the primary oocyte undergoes meiosis I, resulting in the formation of a secondary oocyte and the first polar body. The secondary oocyte then undergoes meiosis II, resulting in the formation of the ovum and the second polar body. Therefore, the primary oocyte is the parent cell that gives rise to the first polar body.Rate this question:
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- 9.
A primary follicle contains
- A.
Follicular cells
- B.
An oogonium
- C.
Secondary oocye
Correct Answer
A. Follicular cellsExplanation
A primary follicle contains follicular cells, which are specialized cells that surround and support the developing oogonium and secondary oocyte. These cells play a crucial role in providing nutrients and growth factors to the oocyte, as well as secreting hormones that regulate the development and maturation of the follicle. Therefore, the presence of follicular cells is an essential characteristic of a primary follicle.Rate this question:
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- 10.
Progesterone is produced
- A.
By the corpus luteum
- B.
By the follicule
- C.
Durig the preovulatory phase
Correct Answer
A. By the corpus luteumExplanation
During the preovulatory phase, progesterone is produced by the corpus luteum. The corpus luteum is formed from the remnants of the ruptured follicle after ovulation. It secretes progesterone, which is a hormone that prepares the uterus for implantation of a fertilized egg and helps maintain pregnancy. The follicle, on the other hand, produces estrogen during the preovulatory phase. Therefore, the correct answer is "by the corpus luteum."Rate this question:
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- 11.
Tbe LH surge during the reproductive cycte stimulates
- A.
Rupture of the ovarian wall
- B.
The resumption of meisosis 2
- C.
Increased estrogen production from the follicle
Correct Answer
A. Rupture of the ovarian wallExplanation
The LH surge during the reproductive cycle stimulates the rupture of the ovarian wall. This is an important event in the process of ovulation, where the mature follicle bursts and releases the egg into the fallopian tube. The LH surge triggers the final maturation of the follicle and the release of enzymes that weaken the ovarian wall, leading to its rupture. This allows the egg to be released and potentially fertilized.Rate this question:
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- 12.
Which stage of the sexual response occurs in males ny not usually in females
- A.
Aroual
- B.
Orgasm
- C.
Plateau
- D.
Refractory period
Correct Answer
D. Refractory periodExplanation
The refractory period is the stage of the sexual response that occurs in males but not usually in females. It is a period of time after orgasm during which males are unable to achieve another erection or orgasm. This is due to the release of certain hormones and neurotransmitters that inhibit sexual arousal and prevent further sexual activity. Females do not experience a refractory period and are capable of multiple orgasms without a recovery period.Rate this question:
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- 13.
Breat milk is
- A.
Not produced until several days after parturition
- B.
Ejected from a single opening in the middle of the nipple
- C.
Ejected as soon as the mammary glands synthesize it
Correct Answer
A. Not produced until several days after parturitionExplanation
Breast milk is not produced until several days after parturition. This is because it takes time for the mammary glands to start producing milk. Initially, after giving birth, the breasts produce a thick, yellowish fluid called colostrum, which is rich in antibodies and nutrients. Over the next few days, the production of breast milk increases, and it becomes the primary source of nutrition for the newborn. Therefore, it is correct to say that breast milk is not produced until several days after parturition.Rate this question:
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- 14.
Capactitation occurs
- A.
Before the sperm contacts the ovum
- B.
After the sperm penetrates the zona radiata
- C.
After the neuclei of the sperm and ovum fuse
Correct Answer
A. Before the sperm contacts the ovumExplanation
Capacitation is the process that sperm undergo before they are able to fertilize an egg. During capacitation, the sperm become more motile and acquire the ability to penetrate the zona radiata, which is the protective layer surrounding the egg. This process occurs before the sperm contacts the ovum because it prepares the sperm for fertilization. Once capacitation is complete, the sperm are ready to penetrate the zona radiata and fuse with the egg's nucleus to initiate fertilization.Rate this question:
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- 15.
Which of the following is a single cell that can develop into an entire organism
- A.
Trophoblast
- B.
Blastocyte
- C.
Blastomere
Correct Answer
C. BlastomereExplanation
A blastomere is a single cell that has the potential to develop into an entire organism. During the early stages of embryonic development, the fertilized egg undergoes multiple cell divisions, resulting in a cluster of cells called the blastocyst. Each individual cell within the blastocyst is known as a blastomere. These cells are pluripotent, meaning they have the ability to differentiate into any cell type in the body. Therefore, a blastomere has the capacity to give rise to all the different tissues and organs of an entire organism.Rate this question:
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- 16.
Throphoblasts differentiate to form
- A.
The chorion
- B.
The amnion
- C.
The decidua
Correct Answer
A. The chorionExplanation
The trophoblasts are cells that form the outer layer of the blastocyst during early embryonic development. These cells differentiate to form the chorion, which is the outermost fetal membrane. The chorion plays a crucial role in the exchange of nutrients and waste between the mother and the developing fetus. It also helps in the formation of the placenta, which is responsible for providing oxygen and nutrients to the fetus and removing waste products. Therefore, the correct answer is the chorion.Rate this question:
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- 17.
The fetal membranre contributing to the placenta is in the
- A.
Chorion
- B.
Amnion
- C.
Decidua
- D.
Yolk sac membrane
Correct Answer
A. ChorionExplanation
The chorion is one of the fetal membranes that contributes to the formation of the placenta. It surrounds the amnion and is responsible for the exchange of gases and nutrients between the mother and the fetus. The chorion contains blood vessels that connect to the umbilical cord, allowing for the transfer of oxygen and nutrients from the mother to the fetus, and the removal of waste products from the fetus. Therefore, the chorion plays a crucial role in the development and functioning of the placenta during pregnancy.Rate this question:
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- 18.
A drug that inhibits oxytocins action would impede
- A.
The initiation of labor
- B.
Milk sysnthesis
- C.
Development of the corpus luteum
Correct Answer
A. The initiation of laborExplanation
Oxytocin is a hormone that plays a crucial role in the initiation of labor. It stimulates contractions of the uterine muscles, leading to the onset of labor. Therefore, if a drug inhibits oxytocin's action, it would impede the initiation of labor. This means that the drug would prevent or delay the start of contractions and the progression of labor.Rate this question:
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- 19.
Prgenancy is commonly confirmed by measuring urinary levels of
- A.
Human chorionic gonadoptropin
- B.
Human chorionic thhrotropin
- C.
Progesteron and estrogin
Correct Answer
A. Human chorionic gonadoptropinExplanation
Pregnancy is commonly confirmed by measuring urinary levels of human chorionic gonadotropin (hCG). This hormone is produced by the placenta after implantation occurs. It can be detected in the urine and blood of pregnant women, and its levels increase rapidly during early pregnancy. Therefore, measuring hCG levels is a reliable method to confirm pregnancy.Rate this question:
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- 20.
Which of the following birth control methods has the highest failure rate
- A.
Coitus interruptus
- B.
Condoms
- C.
Diaphragm
Correct Answer
A. Coitus interruptusExplanation
Coitus interruptus, also known as the withdrawal method, involves the man pulling out before ejaculation. This method has the highest failure rate among the given options because it relies solely on the man's ability to withdraw in time to prevent sperm from entering the vagina. However, it is not a reliable method as pre-ejaculate fluid can contain sperm and it requires a high level of self-control and timing, making it more prone to errors and accidental pregnancies. Condoms and diaphragms, on the other hand, are barrier methods that provide more effective contraception by physically blocking sperm from reaching the egg.Rate this question:
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Feb 21, 2024Quiz Edited by
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