Nokea
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.
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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.
Which of the following is not compatible with penile erection?
- A. parasympathetic stimulation
- B. arterial dilation
- C. venous compression
- D. blood leaves erectile tissue
Correct Answer: D
Rationale: The correct answer is D: blood leaves erectile tissue. During penile erection, blood flows into the erectile tissue, causing the penis to become erect. Parasympathetic stimulation and arterial dilation are essential for promoting blood flow into the penis, while venous compression helps to trap blood within the erectile tissue, sustaining the erection. However, if blood were to leave the erectile tissue, it would result in a loss of erection. Therefore, choice D is not compatible with penile erection.
The production of testosterone in the interstitial cells is stimulated by
- A. inhibin
- B. luteinizing hormone
- C. follicl
- D. stimulating hormone
Correct Answer: B
Rationale: The correct answer is B: luteinizing hormone. Luteinizing hormone stimulates the Leydig cells in the testes to produce testosterone. Inhibin (A) regulates the production of FSH, not testosterone. Follicle-stimulating hormone (C) is responsible for sperm production in the testes, not testosterone. Thyroid-stimulating hormone (D) does not play a role in the production of testosterone.
The function of the epididymis is
- A. Sperm maturation
- B. Produce sperm
- C. Spermatid storage
- D. Provide nutrition to sperm
Correct Answer: A
Rationale: The correct answer is A: Sperm maturation. The epididymis is a coiled tube where sperm undergo maturation, gaining motility and ability to fertilize an egg. It does not produce sperm (incorrect B), but stores sperm for a short period (incorrect C) before ejaculation. It also does not provide nutrition to sperm (incorrect D).
Examples of a ball and socket joint is
- A. Interphalangeal joint
- B. Knee joint
- C. Shoulder joint
- D. Elbow joint
Correct Answer: C
Rationale: The correct answer is C: Shoulder joint. A ball and socket joint allows for multi-directional movement with a wide range of motion. The shoulder joint fits this description as it consists of the ball-shaped head of the humerus bone fitting into the socket of the scapula bone. This anatomical structure allows for movements like flexion, extension, abduction, adduction, and rotation. In contrast, the interphalangeal joint (A) is a hinge joint, the knee joint (B) is a hinge joint, and the elbow joint (D) is a pivot joint, none of which have the same range of motion as a ball and socket joint.