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Physio assignment
final study stack
| Term | Definition |
|---|---|
| Secretin | A hormone secreted by the duodenum in response to acidic chyme that |
| Baroreceptor Reflex | A homeostatic mechanism that helps maintain blood pressure by adjusting heart rate and vessel diameter in response to changes in arterial stretch. |
| Negative Feedback Loop | control system where rising hormone levels inhibit further hormone release, maintaining homeostasis. |
| Tubular Reabsorption – | The process where water and solutes are reclaimed from the filtrate in the renal tubules and returned to the bloodstream. |
| Renin-Angiotensin-Aldosterone System | A hormonal system that regulates blood pressure and fluid balance by promoting vasoconstriction and sodium retention. |
| Antidiuretic Hormone (ADH) | A hormone that increases water reabsorption in the kidneys by making collecting ducts more permeable to water. |
| Veins vs. Arteries | Arteries carry oxygen-rich blood away from the heart; veins bring oxygen-poor blood back to the heart. |
| Cardiac Output | he total volume of blood the heart pumps per minute; calculated by multiplying stroke volume by heart rate. It reflects how efficiently the heart supplies blood to the body. |
| Hemodynamics | The study of blood flow and the forces involved, including resistance, pressure, and flow rate. Changes in hemodynamics can affect oxygen delivery. |
| Alveolar Gas Exchange | the process in which oxygen diffuses from alveoli into the pulmonary capillaries and carbon dioxide moves from blood into the alveoli to be exhaled. |
| Tidal Volume | The amount of air moved into or out of the lungs during normal, quiet breathing. It plays a role in overall ventilation efficiency. |
| Tubular Secretion – | the active transport of substances like hydrogen ions, potassium, or drugs from blood into the nephron for excretion. |
| Respiratory Acidosis | A condition caused by hypoventilation leading to CO₂ retention, which increases blood acidity and can impair cellular function if uncorrected. |
| Motilin | A hormone involved in the regulation of interdigestive migrating motor complexes, which help clear the stomach and small intestine between meals. |
| Cortisol | A steroid hormone released by the adrenal cortex in response to stress. It increases blood glucose, suppresses inflammation, and helps maintain blood pressure and metabolism. |
| thyroid hormones | Hormones released by the thyroid gland that regulate the body's metabolism, energy production, and temperature. Their production is controlled by TSH (thyroid-stimulating hormone) from the pituitary. |
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