Altered Physiologic Factors
Altered Physiologic Factors - Related Videos
01:23
Factors Affecting Drug Distribution: Physiological Barriers
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2025
Drug distribution in the body is intricately regulated by various physiological barriers that control the passage of substances. These include the capillary endothelial barrier, the blood-brain, blood-cerebrospinal fluid, blood-placental, and blood-testis barriers. The capillary endothelial barrier allows only smaller molecules below 600 Da (Daltons) to pass through. It also restricts drugs like heparin that are bound to blood components, limiting their movement within the bloodstream. The...
05:33
Physiology of the Circulatory System - Concepts
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2019
Homeostasis Conditions in the external environment of an organism can change rapidly and drastically. To survive, organisms must maintain a fairly constant internal environment, which involves continuous regulation of temperature, pH, and other factors. This balanced state is known as homeostasis, which describes the processes by which organisms maintain their optimal internal conditions. To maintain homeostasis, organisms have developed structures with distinct functions. Physiology is the...
01:30
Alterations in Respiration II
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2024
There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients. In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
01:06
Altered States of Awareness
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2024
Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue. The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain that...
11:55
Physiological Correlates of Emotion Recognition
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California The autonomic nervous system (ANS) controls the activity of the body's internal organs and regulates changes in their activity depending on the current environment. The vagus nerve, which innervates many of the internal organs, is an important part of the system. When our brain senses danger, vagal tone is inhibited, leading to a set of changes in the body designed to make us more prepared to fight or...
FAQs
Altered physiologic factors can change each stage of medication handling: absorption, distribution, metabolism, and excretion. Changes in body composition, hydration, circulation, or organ function may therefore alter how much drug reaches tissues, how it is processed, and how it leaves the body. Clinicians use this relationship to anticipate variation in treatment response and support safer, individualized dosing.
Age, pregnancy, and hormonal changes can make a measured clinical value less straightforward to interpret than it would be under typical conditions. These states may modify circulation, fluid balance, metabolism, or other bodily conditions that shape vital signs and laboratory results. Recognizing the physiologic context helps clinicians distinguish expected variation from findings that require closer assessment.
These factors can influence different but connected aspects of physiology. Hydration affects fluid balance, temperature represents a changed bodily condition, and organ function influences processing and removal of substances. Considering them together gives a more complete basis for interpreting clinical findings and anticipating treatment responses than relying on a single measurement or isolated factor.
Begin by identifying relevant changes such as age, pregnancy, body composition, hydration, temperature, organ function, hormonal status, or disease-related effects. Then consider how those changes could influence circulation, fluid balance, metabolism, vital signs, laboratory results, or medication handling. This structured review supports risk assessment and helps tailor subsequent clinical decisions.
Clinicians can connect the patient’s physiologic state with expected variation in drug absorption, distribution, metabolism, and excretion, while also considering altered circulation, fluid balance, or organ function. The resulting assessment helps anticipate differences in treatment response and supports safer dosing. It also encourages care decisions based on the patient’s current physiology rather than assuming a uniform response.
Accounting for these factors helps researchers interpret why participants may show different vital signs, laboratory findings, disease responses, or treatment outcomes. Age, pregnancy, body composition, organ function, hydration, temperature, hormonal changes, and disease-related changes can affect the body’s response to interventions. Including this context improves risk assessment and clarifies variation in observed effects.