Nokea
What structure links the nasopharynx to the middle ear?
- A. Larynx
- B. Pharyngeal muscles
- C. Eustachian tube
- D. Bronchus
Correct Answer: C
Rationale: The Eustachian tube is the structure that connects the nasopharynx to the middle ear. It functions to equalize pressure between the middle ear and the atmosphere, protecting the eardrum from damage and aiding in the drainage of fluid from the middle ear. This connection is essential for maintaining proper ear function and health. The larynx (Choice A) is not the correct structure that links the nasopharynx to the middle ear. Pharyngeal muscles (Choice B) are involved in swallowing and do not directly link the nasopharynx to the middle ear. The bronchus (Choice D) is part of the respiratory system and is not connected to the middle ear.
You may also like to solve these questions
Which of the following epithelial types is correctly matched with its major function?
- A. Simple squamous epithelium - diffusion
- B. Stratified squamous epithelium - protection
- C. Stratified squamous epithelium - diffusion
- D. Simple columnar epithelium - secretion or absorption
Correct Answer: D
Rationale: The correct answer is D. Simple columnar epithelium is indeed primarily responsible for secretion and absorption due to its tall shape and presence of microvilli, which increase surface area for these functions. Simple squamous epithelium is mainly involved in diffusion, allowing for the exchange of gases or nutrients. Stratified squamous epithelium functions more for protection against mechanical stress and pathogens, as it forms a tough, protective barrier due to its many layers.
Which part of the nervous system includes the femoral, radial, and ulnar nerves?
- A. Somatic
- B. Autonomic
- C. Sympathetic
- D. Parasympathetic
Correct Answer: A
Rationale: The correct answer is A: Somatic. The femoral, radial, and ulnar nerves are all part of the somatic nervous system, responsible for controlling voluntary movements and sensory input. These nerves innervate muscles and skin throughout the body, allowing conscious control of movements and sensations. The somatic nervous system is distinct from the autonomic nervous system, which regulates involuntary bodily functions. Choices B, C, and D are incorrect because the autonomic nervous system (B) is responsible for involuntary functions, while the sympathetic (C) and parasympathetic (D) divisions are subdivisions of the autonomic nervous system, not the somatic nervous system.
Which of the following are considered normal values for the measure of a person's pulse and blood pressure?
- A. 55 beats per minute and 75 over 60 mm Hg
- B. 72 beats per minute and 120 over 80 mm Hg
- C. 100 beats per minute and 140 over 100 mm Hg
- D. 160 beats per minute and 100 over 70 mm Hg
Correct Answer: B
Rationale: Normal values for pulse rate typically range between 60 to 100 beats per minute, while normal blood pressure values are usually around 120/80 mm Hg. Option B falls within these normal ranges for both pulse rate and blood pressure, making it the correct choice. Choices A, C, and D have either pulse rate, blood pressure, or both values outside the normal ranges, making them incorrect.
Which gland controls Calciferol?
- A. Thyroid
- B. Pituitary
- C. Parathyroid
- D. Hypothalamus
Correct Answer: C
Rationale: Calciferol, commonly known as Vitamin D, is regulated by the parathyroid gland, not the thyroid, pituitary, or hypothalamus. The parathyroid gland plays a crucial role in maintaining calcium and phosphorus balance in the body by regulating the production of calcitriol, the active form of Vitamin D. This hormone helps in the absorption of calcium from the intestines and its reabsorption in the kidneys to maintain proper calcium levels in the blood. Therefore, the correct answer is the Parathyroid gland (Choice C). Choices A, B, and D are incorrect as they do not have a direct role in controlling Calciferol.
Which hormone stimulates milk production in the breasts during lactation?
- A. norepinephrine
- B. antidiuretic hormone
- C. prolactin
- D. oxytocin
Correct Answer: C
Rationale: During lactation, the hormone responsible for stimulating milk production in the breasts is 'prolactin.' Prolactin plays a crucial role in initiating and maintaining lactation by promoting the development of alveoli in the mammary glands and stimulating milk synthesis. While oxytocin is involved in the ejection of milk from the breasts, it is prolactin that primarily governs milk production. Norepinephrine is not directly involved in milk production, and antidiuretic hormone primarily regulates water balance and blood pressure, not milk production.