*1-1 lecture

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studysuccess
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309295
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*1-1 lecture
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2015-10-20 00:02:42
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*1-1 lecture
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*1-1 lecture
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  1. define homeostasis
    a dynamic balance between intracellular and extracellular environments.
  2. Homeostasis is primarily controlled by the ____&____ systems.
    nervous and endocrine
  3. 1)___feedback is a response that is opposite to the initial stimuli

    2) give 3 examples
    • 1) negative
    • 2) thermostat, body temp, glucose levels
  4. 1) ____ feedback is a response that reinforces the initial stimulus.
    2) give 2 examles
    • 1) positive
    • 2) childbirth & bood clotting
  5. what happens to proteins when they undergo denaturing, and what are come of the causes?
    • they loose their structure and unfold.
    • Heat, chemicals, pH changes, dehydration, and physical abrasions can cause denaturing
  6. define hydrolysis
    organic molecules are broken apart by hydrolysis. Inserting hydrogen.
  7. define exergenic
    energy releasing by decomposition or breaking covalent (shared) bonds.
  8. define endergonic
    energy storing, usually through anabolism (synthesis reactions).
  9. 1) high pH means
    2) low pH means
    • 1) high basic/low acid
    • 2) low basic/high acid
  10. List 5 functional groups
    • 1) hydroxyl (OH):
    • 2) methyl (CH3):
    • 3) carboxyl (COOH)
    • 4) Amino (NH2)
    • 5) phosphate (H2PO4)
  11. List 4 methyl functional groups
    fats, oils, steroids, amino acids
  12. List 2 hydroxyl functional groups
    sugars and alcohols
  13. define functional groups
    extra groups of atoms often attached to carbon chains  (backbone).
  14. give 3 examples of carboxyls
    amino acids, sugars, proteins
  15. give 2 examples of an aminos
    amino acids and proteins
  16. give 2 examples of phosphates
    nucleic acids, & APT
  17. 1) what happens to a protein when denaturing

    2) what causes denaturing?
    1) they loose their structure and unfold to varying degrees.

    2) heat, chemicals, pH changes, dehydration...
  18. What does DNA stand for & how many nucleotides (subunit/monomer of nucleic acid/polymere) long?
    • Deoxyribonucleic acid (deoxy=sugar)
    • 100 mill-1billion
  19. what does RNA stand for
    • ribonucleic acid (ribo=sugar)
    • 70-10,000 nucleotides long
  20. 1) What is DNA involved with?

    2)what is RNA involved w?
    1) cell division, reproduction, protein synthesis

    2) protein synthesis coded for DNA.
  21. What does ATP stand for?
    Adenosine triphosphate.
  22. 2 forms of decomposition, and which one is often used for ATP to release energy?
    dehydration & hydrolysis, hydrolysis
  23. define exergonic, and endogonic
    • exergonic=release energy-decomposition
    • endergonic=store energy-synthesis
  24. differences between RNA & DNA
    Uricil, Thynine

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