BIO 100 - Exam 1

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tt23
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273378
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BIO 100 - Exam 1
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2014-05-08 17:39:01
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  1. The four organic molecules found in all living systems are carbohydrates, nucleic acids, lipids, and ________.
    proteins
  2. A group of similar organisms capable of interbreeding and producing fertile offspring is a ________.
    species
  3. A group of tissues working together for a common purpose is known as a(n) ________.
    organ
  4. A ________ is a tentative statement about the natural world that can lead to a testable deduction.
    hypothesis
  5. The first step of the scientific method is ________.
    observation
  6. The application of scientific knowledge to improve the condition of humans is known as ________.
    technology
  7. The structure of a cell membrane includes a modified form of lipid called a ________.
    phosolipid
  8. The universal energy source for cells is ________.
    ATP
  9. Cells that have a membrane-bound organelles and cytoplasm are classified as ________ cells.
    eukaryotic
  10. Plasma membranes becomes less fluid when ________ is present.
    cholesterol
  11. The net diffusion of water across a plasma membrane is known as ________.
    osmosis
  12. The ________ is surrounded by an outer membrane which encloses an inner membrane that is highly folded; this organelle is associated with the breakdown of chemical bonds in food.
    mitochondrion
  13. Microtubules and microfilaments compose the ________, which forms an internal network of support for the cell.
    cytoskeleton
  14. The only way that cells can produce ATP in the absence of oxygen is through the process of ________.
    glycolysis
  15. Specialized epithelial tissues that produce and secrete a product are known as ________.
    glands
  16. Epithelial tissue are classified according to the number of cell layers making up the tissue and ________.
    cell shape
  17. Connective tissue is unique because the cells secrete an ________ that can be a semi-liquid or hardened.
    extracellular matrix
  18. Cells in cartilage that produce the ground substance are the ________.
    chondroblasts
  19. Cardiac muscle is located only in the ________.
    heart
  20. Nervous tissue is composed of two types of cells: ________ that conduct impulses and ________ that surround and protect these cells.
    neurons, glial cells
  21. The ability of living organisms to maintain a constant internal environment despite changes in the external environment is _______.
    homeostasis
  22. Ligaments attach ________ to bone.
    bone
  23. The end of a long bone is known as the ________.
    epiphysis
  24. The outer surface of a bone is covered with a tough connective tissue called the ________.
    periosteum
  25. The process by which the cartilage of fetal bones is gradually replaced with bone tissue is ________.
    ossification
  26. The blood calcium level is regulated by two hormones: ________ causes an increase in blood calcium, while ________ causes a decrease in blood calcium.
    • parathyroid hormone
    • calcitonin
  27. Immovable joints such as those found between bones of the skull are ________ joints.
    fibrous
  28. The pure form of matter that cannot be broken down into a simpler form is a(n) ________.
    element
  29. An electrically charged molecule or atom is a(n) ________.
    ion
  30. Molecules that are polar and attracted to water are ________; molecules that are nonpolar and therefore not attracted to water are ________.
    hydrophilic, hydrophobic
  31. The process by which cells breakdown organic macromolecules into their subunits is ________.
    hydrolysis

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