Nokea
What type of synovial joint is the elbow?
- A. Pivot
- B. Hinge
- C. Ball and socket
- D. Toddle
Correct Answer: B
Rationale: The correct answer is B: Hinge. The elbow joint is classified as a hinge joint because of its structure and movement capabilities. Hinge joints allow movement in only one plane, similar to a door hinge, enabling flexion and extension movements. In contrast, pivot joints allow rotational movement, ball and socket joints offer a wide range of motion in multiple directions, and toddle is not a recognized joint type.
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Which of the following epithelial types is correctly matched with its major function?
- A. Simple squamous epitheliumĀ"secretion or absorption
- B. Stratified squamous epitheliumĀ"changes shape when stretched
- C. Stratified squamous epitheliumĀ"diffusion
- D. Simple columnar epitheliumĀ"secretion or absorption
Correct Answer: D
Rationale: The correct answer is D - Simple columnar epitheliumĀ"secretion or absorption. Simple columnar epithelium is typically found in areas where secretion or absorption is the primary function, such as the lining of the intestines. This type of epithelium is composed of a single layer of tall, narrow cells that are well suited for these functions. Simple squamous epithelium is more associated with diffusion due to its thin structure allowing for easy movement of molecules through it. Stratified squamous epithelium is designed to protect underlying tissues and is not primarily involved in diffusion.
What do ceruminous glands secrete?
- A. Oily sebum.
- B. Earwax.
- C. Keratin
- D. Mucus.
Correct Answer: B
Rationale:
To where are all the nutrients that enter the hepatic portal vein routed for decontamination?
- A. Kidney
- B. Pancreas
- C. Spleen
- D. Liver
Correct Answer: D
Rationale: When nutrients are absorbed from the digestive tract, they enter the hepatic portal vein and are transported directly to the liver. The liver acts as a filter, processing and detoxifying these nutrients before they are further distributed to the rest of the body. Therefore, the correct answer is the liver, which plays a crucial role in detoxifying substances that enter the body through the digestive system.
Which structure is part of both the male reproductive system and urinary system?
- A. Epididymis
- B. Ureter
- C. Testis
- D. Urethra
Correct Answer: D
Rationale: The correct answer is D, Urethra. The urethra is a structure shared by both the male reproductive and urinary systems. It serves as a passage for urine to exit the body and for semen during ejaculation. The Epididymis, Testis, and Ureter are not structures that are part of both systems. The Epididymis is involved in sperm maturation, the Testis is responsible for sperm production, and the Ureter transports urine from the kidneys to the bladder.
What is the fundamental unit of life that constructs all living organisms?
- A. Atom
- B. Cell
- C. Organ
- D. Tissue
Correct Answer: B
Rationale: The correct answer is B: Cell. Cells are the fundamental structural and functional units of life that construct all living organisms. Cells carry out vital functions essential for life, such as growth, reproduction, and response to stimuli. While atoms are the basic units of matter, cells are specifically the fundamental units of life.