Tachypnea occurs when respirations are more than ___ breaths per minute.

Correct Answer: C

Rationale: Tachypnea is defined as rapid breathing. Normal adult respiratory rate is around 12-20 breaths per minute. Therefore, tachypnea occurs when respirations are more than 20 breaths per minute. Choice C (20) is correct as it falls within the range of tachypnea. Choices A (14), B (10), and D (18) are incorrect as they are below the threshold for tachypnea.

Correct Answer: D

Rationale: The correct answer is D: Midstream. A clean-catch specimen, also known as midstream urine, is collected during the middle of urination to avoid contamination from the initial and final urine flow. This method minimizes external bacteria and cells from the urethra. Choice A, contaminated, is incorrect as the goal of a clean-catch specimen is to reduce contamination. Choice B, cleansing, is unrelated to the specific urine collection process. Choice C, stop and start, does not accurately describe the method used for collecting a clean-catch specimen.

Correct Answer: D

Rationale: The correct answer is D, Third-degree burn. This type of burn affects the epidermis, dermis, and underlying tissue, causing extensive damage. The epidermis and dermis are completely destroyed, leading to loss of sensation and potential scarring. First-degree burns (B) only affect the epidermis, while second-degree burns (A) involve the epidermis and part of the dermis. Partial-thickness burns (C) are a general term that can refer to both first and second-degree burns, but do not specifically indicate involvement of underlying tissue.

Correct Answer: C

Rationale: The correct answer is C: Increased lung capacity. Deep-breathing exercises involve taking slow, deep breaths, which can strengthen the respiratory muscles and improve the efficiency of oxygen exchange in the lungs. This leads to an increase in lung capacity over time. Choice A is incorrect as deep-breathing exercises actually help in clearing mucus from the respiratory system. Choice B is incorrect as deep-breathing exercises do not decrease salivary production. Choice D is incorrect as deep-breathing exercises actually help in increasing oxygen levels in the body by improving oxygen intake and utilization.

Correct Answer: C

Rationale: The correct answer is C because the musculoskeletal system stores calcium and phosphorous, which are essential minerals for bone health and muscle function. Calcium is stored in bones and released when needed for muscle contraction and other bodily functions. Phosphorous is also stored in bones and plays a crucial role in energy production and maintaining cell structure. The other choices are incorrect because storing vitamin D (A) is primarily done by the skin and liver, supplying oxygen to cells (B) is the function of the respiratory and circulatory systems, and transporting antibodies to cells (D) is the function of the immune system.