Nokea
Why doesn't an antibiotic work for treating the flu symptoms in a patient?
- A. The antibiotic is for a different type of infection.
- B. The antibiotic is not effective against the flu virus.
- C. The antibiotic is not administered in a sufficient dosage to combat the flu.
- D. None of the above
Correct Answer: B
Rationale: Antibiotics are effective against bacterial infections, not viral infections like the flu. Influenza is caused by a virus, and antibiotics do not work against viruses. Using antibiotics inappropriately, such as for viral infections, can lead to antibiotic resistance and other adverse effects. Therefore, it is important to use antibiotics only when prescribed by a healthcare professional for bacterial infections.
You may also like to solve these questions
Which of the following is necessary for cell diffusion?
- A. water
- B. membrane
- C. ATP
- D. gradient
Correct Answer: A
Rationale: Water is necessary for cell diffusion because it serves as the medium through which particles move across cell membranes. Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration, and water plays a crucial role in facilitating this process by dissolving molecules and allowing them to move freely. Membranes provide the barrier for diffusion to occur, ATP is not directly involved in the process of diffusion, and a gradient is the difference in concentration that drives diffusion but is not a necessary component for diffusion itself.
Epithelial cells are:
- A. Polarized
- B. Neutral
- C. Larger than other cells
- D. None of the above
Correct Answer: A
Rationale: Epithelial cells are polarized, meaning they have distinct structural and functional differences between their apical and basolateral surfaces. This polarity allows them to perform specialized functions efficiently. The statement that epithelial cells are larger than other cells is incorrect as cell size can vary across different cell types, and being larger is not a defining characteristic of epithelial cells.
A plant cell is placed in a solution and it shrinks from water loss. In what type of environment was the cell placed?
- A. Plasmolytic
- B. Hypertonic.
- C. Hypotonic.
- D. Isosmotic.
Correct Answer: B
Rationale: Correct Answer: B - Hypertonic
Rationale:
1. A hypertonic solution has a higher solute concentration than the cell, causing water to move out of the cell by osmosis.
2. Water loss results in the cell shrinking, as observed in this scenario.
3. Plasmolytic refers to the process of cytoplasm shrinking due to water loss in a hypertonic environment.
4. Hypotonic and isosmotic environments would not cause the cell to shrink from water loss.
Which cellular appendage enables cells to move through their environments?
- A. Cell membrane.
- B. Receptor.
- C. Flagellum.
- D. Transport protein.
Correct Answer: C
Rationale:
Why is homeostasis necessary?
- A. To maintain temperature
- B. To maintain pH
- C. To maintain glucose levels
- D. All of the above
Correct Answer: D
Rationale: Homeostasis is essential for the body to maintain internal balance and ensure optimal functioning. It is responsible for regulating temperature to prevent overheating or cooling, controlling pH levels to support biochemical reactions, and managing glucose levels for energy production. Therefore, all the options - maintaining temperature, pH, and glucose levels - are crucial functions of homeostasis.