Nokea
Which hormone stimulates milk production in the breasts during lactation?
- A. norepinephrine
- B. antidiuretic hormone
- C. prolactin
- D. oxytocin
Correct Answer: C
Rationale: Prolactin is the hormone responsible for stimulating milk production in the breasts during lactation. It is produced by the pituitary gland and plays a crucial role in the initiation and maintenance of lactation. While norepinephrine, antidiuretic hormone, and oxytocin have roles in various physiological processes, they do not directly stimulate milk production. Therefore, the correct answer is prolactin.
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Which structure is located on the sternum?
- A. Xiphoid process
- B. Sesamoid bone
- C. Hyoid bone
- D. Ossified process
Correct Answer: A
Rationale: The xiphoid process is the structure located at the bottom of the sternum. It is a small cartilaginous process that ossifies with age. The sesamoid bone is a small bone embedded within a tendon, not typically found on the sternum. The hyoid bone is a U-shaped bone located in the neck, not on the sternum. 'Ossified' refers to a structure that has become hardened like bone, but it is not a specific structure located on the sternum.
Which stratum of the epidermis is found only in thick skin?
- A. Lucidum.
- B. Corneum.
- C. Basale.
- D. Granulosum.
Correct Answer: A
Rationale:
How does the skin aid in maintaining the calcium and phosphate levels of the body?
- A. Sebum production
- B. Keratin synthesis
- C. Vitamin A synthesis
- D. Vitamin D production
Correct Answer: D
Rationale: The skin aids in maintaining calcium and phosphate levels in the body by producing Vitamin D when exposed to sunlight. Vitamin D is crucial for the absorption of calcium and phosphate from the diet, vital for bone health, and various physiological functions. When UV radiation penetrates the skin, it triggers the conversion of a compound into Vitamin D, which then facilitates the absorption of calcium and phosphate in the intestines.
Where do spermatozoa develop in men?
- A. Seminiferous tubules
- B. Vas deferens
- C. Ejaculatory ducts
- D. Bulbourethral glands
Correct Answer: A
Rationale: Spermatozoa develop within the seminiferous tubules of each testis. These tubules are responsible for the production of sperm through a process called spermatogenesis. While the vas deferens, ejaculatory ducts, and bulbourethral glands play essential roles in the transport and release of sperm, they are not involved in the actual development of sperm.
Anaerobic respiration can lead to a burning sensation caused by which molecule?
- A. Adenosine triphosphate (ATP).
- B. Lactic acid
- C. Creatine-phosphate.
- D. Adenosine diphosphate (ADP).
Correct Answer: B
Rationale: