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Related Concept Videos

What is Homeostasis?01:16

What is Homeostasis?

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Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F).
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Positive and Negative Feedback Loops01:18

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Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
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Homeostatic Imbalance01:10

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Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
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An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
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pH Homeostasis01:31

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Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
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Regulation of Hormone Secretion01:19

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Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
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Using Caenorhabditis elegans as a Model System to Study Protein Homeostasis in a Multicellular Organism
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Homes rule.

F O Ettinger1

  • 1Garve, Ross-sbire.

Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
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Summary
This summary is machine-generated.

A Registered General Nurse (RGN) reflects on completing training at age 45. Despite enjoying the experience, the nurse faced concerns about dispersing colleagues and limited nursing job prospects upon graduation.

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Area of Science:

  • Nursing Education
  • Career Transition

Background:

  • Reflective account of a late-entry nursing student.
  • Experience nearing completion of Registered General Nurse (RGN) training.

Purpose of the Study:

  • To document the emotional and professional reflections at the end of nursing training.
  • To highlight concerns regarding post-graduation employment in nursing.

Main Methods:

  • Personal narrative and reflection.
  • Qualitative self-assessment.

Main Results:

  • Positive overall experience during three years of nursing training.
  • Significant apprehension regarding future employment opportunities in the nursing field.
  • Anticipation of group dispersal and the end of the student nurse phase.

Conclusions:

  • The transition from student nurse to registered nurse can be accompanied by significant emotional and practical challenges.
  • Concerns about job prospects are a key factor influencing the outlook of newly qualified nurses.