Nokea
The calcaneus is located in what part of the body?
- A. Foot.
- B. Mouth.
- C. Head
- D. Hand.
Correct Answer: A
Rationale:
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Why are the hydrochloric acid and digestive enzymes from the stomach unable to digest the stomach itself?
- A. The digestive enzymes in the stomach are too weak.
- B. Rugae lining of the stomach Is too tough to be attacked by digestive enzymes.
- C. Stomach wall is protected by large amounts of mucus.
- D. Stomach wall is composed of substances other than protein.
Correct Answer: C
Rationale:
What is the function of the thrombocytes?
- A. Form connective tissue.
- B. Play a role in blood clotting.
- C. Defend against infection.
- D. Transport respiratory gases.
Correct Answer: B
Rationale:
Which type of skin cancer can be recognized in lesion characteristics based on the ABCD rule?
- A. Melanoma
- B. Basal cell carcinoma
- C. Sarcoma
- D. Squamous cell carcinoma
Correct Answer: B
Rationale: The ABCD rule is a method used to identify characteristics associated with melanoma, not basal cell carcinoma. The letters stand for Asymmetry, Border irregularity, Color variation, and Diameter greater than 6mm. Basal cell carcinoma is the most common type of skin cancer, but it is not typically identified using the ABCD rule. Melanoma is the correct answer as it is the type of skin cancer recognized based on the ABCD rule.
What organelle contributes to phagocytosis in white blood cells?
- A. ER
- B. Lysosomes
- C. Vacuole
- D. Golgi apparatus
Correct Answer: B
Rationale: Lysosomes play a crucial role in phagocytosis within white blood cells. Lysosomes contain enzymes that aid in the digestion of foreign particles and cellular debris, making them essential for the process of phagocytosis. The other organelles listed, such as the endoplasmic reticulum (ER), vacuole, and Golgi apparatus, do not directly contribute to phagocytosis within white blood cells.
Which structure regulates the transport of substances in and out of the cell?
- A. Cell membrane
- B. Cell's cytoplasm
- C. Nuclear membrane
- D. Plasma membrane
Correct Answer: D
Rationale: The plasma membrane, also known as the cell membrane, is responsible for regulating the transport of substances in and out of the cell. It acts as a selective barrier, allowing certain molecules to pass through while blocking others. The cytoplasm is the fluid within the cell, and the nuclear membrane surrounds the nucleus, not involved in regulating substance transport. Therefore, the correct answer is the plasma membrane.