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Related Concept Videos

Xylem and Transpiration-driven Transport of Resources02:03

Xylem and Transpiration-driven Transport of Resources

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The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
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Short-distance Transport of Resources02:12

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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
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When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
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As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
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The Apoplast and Symplast01:46

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Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
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Internet resources for hospice and bereavement.

Becky McKay1

  • 1Medical Sciences Library, Texas A & M University, 4462 TAMU, College Station, TX 77843-4462, USA. bmckay@medlib.tamu.edu

Medical Reference Services Quarterly
|October 11, 2008
PubMed
Summary

Interest in end-of-life care has grown. This article overviews hospice care, focusing on symptom relief for the dying, family support, and bereavement services, with resources for professionals and consumers.

Area of Science:

  • Palliative Care
  • Thanatology
  • Health Services Research

Background:

  • Growing interest in improving end-of-life care over the past decade.
  • Need for accessible information on hospice and grief support.
  • Importance of interdisciplinary approaches in terminal care.

Purpose of the Study:

  • To provide an overview of hospice care.
  • To describe the aims of hospice, including symptom management and family support.
  • To identify and describe relevant web resources for hospice and grief.

Main Methods:

  • Literature review on hospice care.
  • Identification of key components of hospice services.
  • Curated list of web resources for healthcare professionals and consumers.

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Main Results:

  • Hospice offers interdisciplinary care focused on relieving pain and symptoms.
  • Support extends to families during the dying process and includes bereavement assistance.
  • A list of useful websites for hospice and grief information is provided.

Conclusions:

  • Hospice care is a vital component of end-of-life care.
  • Accessible resources are crucial for both healthcare providers and the public.
  • Further dissemination of information on hospice and grief support is recommended.