Nokea
Which type of cholesterol is considered to be the healthiest?
- A. LDL
- B. HDL
- C. VLDL
- D. VHDL
Correct Answer: B
Rationale: High-Density Lipoprotein (HDL) cholesterol is considered the healthiest type of cholesterol because it helps remove LDL cholesterol from the arteries, reducing the risk of heart disease. HDL acts as a scavenger, carrying cholesterol away from the arteries to the liver where it can be processed and eliminated from the body. Having high levels of HDL cholesterol is associated with a lower risk of cardiovascular diseases.
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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.
In which cavity are the urinary bladder and internal reproductive organs found?
- A. Pelvic
- B. Abdominal
- C. Thoracic
- D. Pleural
Correct Answer: A
Rationale: The correct answer is A: Pelvic. The urinary bladder and internal reproductive organs are located in the pelvic cavity. The pelvic cavity is situated below the abdominal cavity and houses various organs, including the urinary bladder and reproductive organs. The abdominal cavity contains organs like the stomach, liver, and intestines, while the thoracic cavity houses the lungs and heart. Pleural is an incorrect choice as it is related to the lining around the lungs.
Which organelle contributes to phagocytosis in white blood cells?
- A. Endoplasmic Reticulum (ER)
- B. Lysosomes
- C. Vacuole
- D. Golgi apparatus
Correct Answer: B
Rationale: Lysosomes are the organelles responsible for phagocytosis in white blood cells. During phagocytosis, white blood cells engulf and digest pathogens or debris. Lysosomes contain enzymes that aid in breaking down the engulfed material, playing a crucial role in the process. On the other hand, the Endoplasmic Reticulum (ER), Vacuole, and Golgi apparatus have different functions within the cell and are not directly involved in phagocytosis.
Which mineral is responsible for muscle contractions?
- A. Chloride
- B. Sodium
- C. Calcium
- D. Magnesium
Correct Answer: C
Rationale: Calcium is the mineral responsible for muscle contractions. When a muscle receives a signal from the nervous system, calcium is released within the muscle cells, allowing the muscle fibers to contract. This process is essential for various bodily functions, including movement, digestion, and heart function.
Which hormones regulate testicular activity?
- A. FSH
- B. LH
- C. GH
- D. Both FSH and LH
Correct Answer: D
Rationale: Testicular activity is regulated by both follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH stimulates sperm cell production in the testes, while LH stimulates testosterone production by Leydig cells in the testes. Therefore, both FSH and LH are essential in controlling testicular activity.