Nokea
The hormone(s) responsible for hymen. secondary sex characteristics in
- A. The vagina is the female females is/are ________.
- B. estrogens
- C. The innermost lining of the
- D. progesterone
Correct Answer: B
Rationale: The correct answer is B: estrogens. Estrogens are the primary hormones responsible for the development of secondary sex characteristics in females, including the formation of the hymen. Estrogens play a crucial role in regulating menstrual cycles, breast development, and overall reproductive health in females. Progesterone (choice D) is primarily involved in regulating the menstrual cycle and supporting pregnancy but is not directly responsible for hymen development. Choices A and C do not provide accurate or relevant information related to the development of secondary sex characteristics or the hymen.
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The secondary oocyte completes its second meiotic division
- A. just after fertilization
- B. just after ovulation
- C. just before fertilization
- D. just before ovulation
Correct Answer: A
Rationale: The correct answer is A: just after fertilization. After fertilization, the secondary oocyte completes its second meiotic division, forming a mature ovum and a polar body. This process occurs to ensure the correct chromosome number in the resulting zygote. Choices B, C, and D are incorrect because the completion of the second meiotic division occurs specifically after fertilization, not before or just after ovulation or fertilization.
Which of the following describes oviparity?
- A. Offspring are fully developed at birth.
- B. Young mammals obtain nourishment from mother's placenta
- C. Embryos that continue developing outside their mother's body.
- D. Frogs that hatch from shell-covered fertilized eggs within female's body.
Correct Answer: D
Rationale: Oviparity refers to the reproductive mode where organisms lay eggs that hatch outside the body. Choice D is correct as it describes frogs hatching from shell-covered fertilized eggs within the female's body. This is because frogs lay eggs externally after fertilization, and the eggs hatch into tadpoles outside the female's body. Choices A and B are incorrect as they describe viviparity, where offspring are fully developed at birth and young mammals obtain nourishment from the mother's placenta, respectively. Choice C is incorrect as it describes ovoviviparity, where embryos develop inside eggs within the mother's body but are born live.
The fecundated spermatozoon contains:
- A. 11 pairs of somatic chromosomes;
- B. 22 somatic chromosomes ;
- C. only the X sex chromosome;
- D. the X or Y sex chromosome
Correct Answer: D
Rationale: The correct answer is D because the fecundated spermatozoon can contain either the X or Y sex chromosome, determining the genetic sex of the offspring. Spermatozoa are haploid cells, meaning they contain only one set of chromosomes. During fertilization, the spermatozoon fuses with the ovum, which also contains a single set of chromosomes, resulting in a diploid zygote with a complete set of chromosomes. Choices A and B are incorrect as somatic chromosomes refer to the non-reproductive cells in the body, not the chromosomes found in gametes. Choice C is incorrect because the spermatozoon can carry either the X or Y sex chromosome, not exclusively the X chromosome.
What is line “F” pointing to?
- A. Ductus epididymis
- B. Rete testis
- C. Efferent duct
- D. Afferent duct
Correct Answer: A
Rationale: The correct answer is A: Ductus epididymis. Line "F" is pointing to the ductus epididymis, which is a part of the male reproductive system where sperm mature and are stored. The ductus epididymis is located at the top of the testis and is connected to the rete testis. It is responsible for transporting sperm from the testis to the vas deferens.
Explanation for incorrect choices:
B: Rete testis - The rete testis is a network of tubules located within the testis, not the ductus epididymis.
C: Efferent duct - Efferent ducts are small ducts that connect the rete testis to the epididymis, not the ductus epididymis itself.
D: Afferent duct - Afferent ducts are responsible for transporting sperm from the rete testis to the epididymis, not within the epid
Of the two functional areas of the years of age is known as ________. It blastocyst, the three primary germ is during this time that the reproductive layers form from the ________. organs grow to their adult size and
- A. amnion become functional under the influence
- B. morula of hormones.
- C. inner cell mass
- D. adulthood
Correct Answer: D
Rationale: The correct answer is D: adulthood. The question is referring to the two functional areas of life - childhood and adulthood. During adulthood, organs grow to their adult size and mature, reproductive organs become functional under the influence of hormones.
A: amnion become functional under the influence - Incorrect. Amnion is a membrane surrounding the embryo, not related to the functional areas of age.
B: morula of hormones - Incorrect. Morula is an early stage of embryonic development, not related to the functional areas of age.
C: inner cell mass - Incorrect. Inner cell mass is a part of the blastocyst, not related to the functional areas of age.