Which of the following is a primary function of the lymphatic system?

A. Bronchi: Wheezing and difficulty breathing often result from bronchoconstriction or inflammation in the bronchi. These large airway passages are critical for directing airflow to the lungs, and obstruction here causes audible wheezing.

B. Diaphragm: The diaphragm is the primary muscle for ventilation, but dysfunction would cause general breathing difficulty, not wheezing.

C. Alveoli: Alveoli are responsible for gas exchange; problems here usually cause hypoxia or shortness of breath, but wheezing is less characteristic.

D. Pharynx: The pharynx serves as a passageway for air and food; obstruction here may cause stridor but not the typical wheezing associated with lower airway issues.

A. Insulin: Insulin is produced by the beta cells of the pancreas and regulates blood glucose levels. It promotes the uptake of glucose into cells and its storage as glycogen, playing a central role in energy metabolism.

B. Epinephrine: Epinephrine is synthesized in the adrenal medulla and functions in the fight-or-flight response. It increases heart rate, blood pressure, and blood glucose levels to prepare the body for rapid activity.

C. Growth hormone (GH): Growth hormone is secreted by the anterior pituitary gland. It stimulates growth of bones and tissues, promotes protein synthesis, and regulates metabolism, affecting multiple organ systems throughout the body.

D. Cortisol: Cortisol is produced by the adrenal cortex in response to ACTH from the anterior pituitary. It regulates metabolism, supports the stress response, and influences immune and anti-inflammatory functions.