A nurse is instructing a hospitalized client with a diagnosis of emphysema about measures that will enhance the effectiveness of breathing during dyspneic periods. Which of the following positions will the nurse instruct the client to assume?

Correct Answer: D

Rationale: The correct answer is D, sitting on the side of the bed and leaning on an overbed table. This position promotes maximum expansion of the thorax, allowing for improved lung ventilation. Leaning forward helps reduce the work of breathing and facilitates better airflow. Options A and C do not provide the same level of thoracic expansion and may not be as effective. Option B may not provide the necessary support for the client to lean forward and optimize breathing.

Correct Answer: D

Rationale: Exchange across a membrane involves the movement of molecules or ions. Moisture (A) helps facilitate this movement by dissolving solutes. Transport proteins (B) are essential for facilitating the movement of specific molecules across the membrane. Pressure gradients (C) can drive the movement of substances across the membrane. Therefore, the correct answer is D, as all these factors play a crucial role in facilitating exchange across a membrane. Moisture alone is not sufficient for exchange, transport proteins are necessary for specific molecule transport, and pressure gradients can aid in driving the movement of substances.

Correct Answer: D

Rationale: The correct answer is D, all of the above. Cessation of smoking reduces the risk of stillbirth by improving fetal health. It also reduces the chances of cancer by decreasing exposure to carcinogens. Additionally, quitting smoking decreases the risk of coronary disease by improving heart health. Therefore, all the choices are correct as they highlight different positive outcomes of quitting smoking.

Correct Answer: A

Rationale: The correct answer is A: Hypoxia. Hypoxia refers to inadequate oxygen supply to the tissues, leading to tissue damage. Asphyxia is a condition of suffocation due to lack of oxygen supply. Pleurisy is inflammation of the lining of the lungs, not directly related to oxygen supply. Anoxia is a severe form of hypoxia where there is complete deprivation of oxygen to the tissues. In this context, hypoxia best describes the condition of inadequate oxygen supply to the tissues.

Correct Answer: C

Rationale: The correct answer is C: Tidal volume. Tidal volume is the amount of air that moves in and out of the lungs during normal breathing. This volume represents the normal breathing pattern and is essential for gas exchange in the lungs. Residual volume (A) is the air that remains in the lungs after maximal expiration. Vital capacity (B) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. Tidal capacity (D) is not a recognized term in respiratory physiology. Therefore, the correct choice is C as it specifically refers to the air moved during normal breathing.