Nokea
Which of the following cells secrete testosterone
- A. spermatocytes
- B. oocytes
- C. anterior pituitary cells
- D. leydig cells
Correct Answer: D
Rationale: Rationale:
1. Leydig cells are located in the testes and are responsible for secreting testosterone.
2. Testosterone is a male sex hormone crucial for the development of male reproductive tissues.
3. Spermatocytes and oocytes are involved in gamete production, not testosterone secretion.
4. Anterior pituitary cells secrete hormones like FSH and LH, not testosterone.
Summary:
Leydig cells secrete testosterone in the testes, making them the correct choice. Spermatocytes, oocytes, and anterior pituitary cells are not involved in testosterone secretion.
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The process in which sperm are hormone (FSH) have on males? streamlined into a head, midpiece,
- A. Male testes are not and tail is called ________.
- B. spermatogenesis
- C. FSH functions solely in
- D. acrosomal reaction
Correct Answer: B
Rationale: The correct answer is B: spermatogenesis. Spermatogenesis is the process by which sperm cells are produced in the male testes. FSH (follicle-stimulating hormone) plays a crucial role in stimulating the production of sperm within the testes. During spermatogenesis, sperm cells go through various stages of development, including the formation of a head, midpiece, and tail. The other choices are incorrect because:
A: Male testes are not and tail is called ________. This statement is incomplete and does not make sense in the context of the question.
C: FSH functions solely in. This choice is incomplete and does not provide any relevant information about the process of sperm production.
D: Acrosomal reaction. This term refers to a specific event that occurs during fertilization and is not directly related to the overall process of sperm production in the testes.
Which hormone stimulates the secondary female sex organs?
- A. FSH
- B. LH
- C. GnRH
- D. estrogen
Correct Answer: D
Rationale: The correct answer is D: estrogen. Estrogen is the hormone that stimulates the growth and development of secondary female sex organs like the breasts, uterus, and fallopian tubes. It plays a crucial role in regulating the menstrual cycle and preparing the body for pregnancy. FSH and LH are hormones released by the pituitary gland that primarily regulate the ovarian cycle, while GnRH is a hormone released by the hypothalamus to stimulate the pituitary gland to release FSH and LH. Estrogen, being a primary female sex hormone, directly influences the development and function of secondary sex organs in females.
Choose the correct sequence of events in the post-fertilization cleavage process.
- A. Zygote - morula- 2 cells- 4 cells- 8 cells- blastula
- B. 2 cells- 4 cells- 8 cells- zygote- morula- blastul
- C. Zygote- 2 cells- 4 cells- 8 cells- morula- blastul
- D. 8 cells-4 cells-2 cells-morula-zygote-blastula
Correct Answer: A
Rationale: The correct sequence is A: Zygote - morula - 2 cells - 4 cells - 8 cells - blastula. After fertilization, the zygote undergoes cleavage to form the morula, which then divides into 2 cells, then 4 cells, and further into 8 cells. These cells then rearrange to form the blastula. This sequence aligns with the natural progression of post-fertilization cleavage in embryonic development.
Choices B, C, and D are incorrect because they do not follow the correct chronological order of events in post-fertilization cleavage. In these sequences, the order of cell divisions is mixed up, leading to an inaccurate representation of the cleavage process. It is crucial to understand the logical progression of events in embryonic development to identify the correct sequence of post-fertilization cleavage.
The following secondary sexual characteristics are influenced by the testosterone:
- A. skeleton;
- B. voice;
- C. the secretory modification of the spermatogenic epithelium;
- D. the distribution of excess fat;
Correct Answer: B
Rationale: Step-by-step rationale:
1. Testosterone is a male sex hormone responsible for developing secondary sexual characteristics.
2. Voice deepening is a well-known secondary sexual characteristic influenced by testosterone.
3. Testosterone affects the larynx, causing vocal cords to lengthen and thicken, leading to a deeper voice.
4. Skeleton development is mainly influenced by growth hormones, not testosterone.
5. Secretory modifications in spermatogenic epithelium are regulated by other hormones like FSH and LH, not testosterone.
6. The distribution of excess fat is influenced by various factors like genetics and metabolism, not specifically testosterone.
Summary:
Voice deepening (choice B) is the correct answer as it is a well-known secondary sexual characteristic influenced by testosterone. Choices A, C, and D are incorrect as they are not directly influenced by testosterone in the context of secondary sexual characteristics.
The hormone that promotes a small protrudes into the vagina is the number of primary follicles within the ________. ovary to grow and mature each month
- A. infundibulum is ________.
- B. cervix
- C. luteinizing hormone (LH)
- D. hymen
Correct Answer: D
Rationale: The correct answer is D: hymen. The hormone that promotes the growth and maturation of primary follicles in the ovary each month is follicle-stimulating hormone (FSH), not luteinizing hormone (LH) as mentioned in choice C. Choices A and B are anatomical structures not related to follicular development. The hymen is a thin membrane at the vaginal opening and has no direct role in promoting follicle growth. However, it is the most related choice as it is the only one that is a part of the female reproductive system.