A&P 1.6-end

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A&P 1.6-end
2015-09-19 23:09:23
A&P 1.6-end
A&P 1.6-end
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  1. metabolism def
    sum of all this internal chemical (anabolism, catabolism, & excretion).
  2. Anabolism def:
    Catabolism def:
    Excretion def:
    • Anabolism def: complex molecules formed from simpler ones
    • Catabolism def: simple molecules form complex ones
    • Excretion def: waste & toxins separate waste during metabolic processes.
  3. Homeostasis def
    ability to maintain relatively stable internal conditions
  4. 2 major processes of development
    • 1) differentiation (transformation of cells w/no specialized function into ones w/a task.
    • 2) growth (increase in size).
  5. dynamic equalibrium def
    balanced change where there is a certain set point
  6. negative feedback def:
    Positive feedback def:
    • negative feedback def: process by which the body senses change and activates mechanisms that negate or reverse it.
    • Positive feedback def: self-amplifying cycle leading to greater change
  7. vasodilatation def:
    • -widening of the blood vessels. When blood vessels dilate, warm blood flows closer to the body surface and loses heat to surroundings.
    • -sweating will occur to loose more heat
  8. vasoconstriction def:
    • -narrowing of blood vessels to retain warm blood deeper in the body to reduce heat loss.
    • -shivering will occur to generate more heat
  9. eponyms def
    terms coined from names of people
  10. acronym def
    words comosed of the first letter for first few letters of a serios of words
  11. How do x-rays work?
    radiation is absorbed by dense tissues (bone, teeth, tumors), and rediopaque substances can be injected to absorb x-rays through injection or ingestion.
  12. How does Computed Tomography (CT) scans work?
    slices of low intensity x-ray images
  13. How do Positron Emission Tomography scans work (PET)
    radioactively labeled glucose is injected (electron-like particles meet positrons to annihilate each other giving off gamma rays). Color images show which tissues are using the most glucose at the moment. They can show metabolic states like damage to heart tissues by a lack of glucose uptake.
  14. How do Magnetic Resonance Images (MRI) work:
    radio waves cause hydrogen atoms to absorb additional energy and align in different directions. Radio waves are turned off to allow hydrogen atoms to realign themselves to the magnetic field, giving off their excess energy at different rates depending on the tissue type.
  15. How do sonographs work?
    high frequency ultrasound waves can evaluate bone or lungs, fetal age, position, development.
  16. anatomical position
    standing on feet, palms facing forward.
  17. Frontal pland
    • separates front from back of body
    • AKA coronal plane.
  18. Transverse plane
    Separates top from bottom
  19. sagittal plane
    • separates left from right side of body
    • AKA: median saggital
  20. Ventral
    toward the front of the body
  21. Anterior
    Closer to the front (e.g. the pituitary is anterior to the hypothalamus).
  22. Dorsal
    toward the back
  23. Posterior
    Closer to the back (e.g. the brain is posterior to the eyes).