Nokea
The orthopedic surgeon informs you that you have broken the middle region of the humerus. What is he describing?
- A. Epiphysis
- B. Articular cartilage
- C. Perichondrium
- D. Diaphysis
Correct Answer: D
Rationale: The correct answer is D, Diaphysis. The humerus is a long bone consisting of a shaft known as the diaphysis. The diaphysis is the middle region of a long bone, while the epiphysis refers to the ends of the long bone. Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints, and the perichondrium is the connective tissue covering the cartilage.
You may also like to solve these questions
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 type of cholesterol is considered the best for health?
- A. LDL
- B. HDL
- C. VLDL
- D. VHDL
Correct Answer: B
Rationale: High-density lipoprotein (HDL) is considered the best type of cholesterol for health. HDL helps remove excess cholesterol from the bloodstream, reducing the risk of heart disease. Conversely, low-density lipoprotein (LDL) is often referred to as 'bad' cholesterol as it can lead to plaque buildup in arteries. Very low-density lipoprotein (VLDL) and very high-density lipoprotein (VHDL) are not commonly used terms in cholesterol classification.
What is the cause of the burning sensation associated with anaerobic respiration?
- A. Carbon dioxide
- B. Lactic acid
- C. Oxygen
- D. Glucose
Correct Answer: B
Rationale: The burning sensation associated with anaerobic respiration is caused by the buildup of lactic acid in muscles. When oxygen supply to tissues is insufficient, the body produces lactic acid. During intense exercise when the oxygen demand exceeds supply, lactic acid accumulates, leading to the burning sensation. Therefore, lactic acid is responsible for the burning sensation experienced in anaerobic respiration.
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.
Where is blood produced in infants after birth?
- A. Heart chamber
- B. Red bone marrow
- C. Liver
- D. Spleen
Correct Answer: B
Rationale: After birth, blood is primarily produced in the red bone marrow of infants. Red bone marrow is responsible for generating red blood cells, white blood cells, and platelets that are vital for normal physiological functions. Hematopoiesis, the process of blood cell formation, primarily occurs in the red bone marrow of newborns and infants, making it a critical site for blood production in this age group.