A&P 207 Quiz Answers – Flashcards
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Which of the following substances comprise 95% of the human body
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Carbon Hydrogen Oxygen Nitrogen
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Which of the following represents the number of elements required by living organisms
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20
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The electrons of an atom occupy one or more areas of space called
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Shells
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The electrons in the outermost shell of an atom determine its
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Chemical Behavior
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The atoms of isotopes of a particular element vary in the number of
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Neurtons
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The attraction of the positive hydrogen end of a polar molecule to the negative nitrogen or oxygen end of another polar molecule is called
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Hydrogen Bond
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A molecule of a compund always contains definite kinds and numbers of
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Atoms
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A chemical reaction in which pairs of two of diffrent molecules trade positions with one another is a
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Exchange Reaction
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A decomposition reaction can be symbolized
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AB - A+B
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A solution that contains more hydrogen ions than hydroxide ions is
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Acidic
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Each whole number on the PH scale represents 10 fold difference in hydrogen ion concentrations
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10 Fold
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As hydrogn ion concentrations increases the PH number
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Gets Smaller
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A solution that has a PH of 6 has ten times the hydrogen ion concentration of a solution with
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7
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A person has alkalosis if the blood PH
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Rises above 7.45
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Chemicals that resist changes in PH are called
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Buffers
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Which of the following chemicals is not an inorganic substance
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Nucleic Acids
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Inorganis substances that usually dissociate in water are callled
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Electrolytes
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Carbon Dioxide
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A waste product of metabolic process and exhaled from the lungs
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Which of the following is not an organic substance
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Carbon dioxide
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The different types of carbohydrates do not include
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Proteins
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An investionator who conducts an experiment to determine how the rate at which affect temperatue changes is most likely to be
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Physiologist
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Which of the followin lists best illustrates the idea of increasing levels of organization
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Atom Molecule Macromolecule Organelle Cell
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Metabolism is defined
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The sum total of all of the chemcial reactions in the body that breaks down substances and build them up
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The building up phase of metabolism is called
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Anabolism
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The breakingdown phase of metabolism is called
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Catabolism
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Which of the following processes is not concerned with maintaining the life of
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Reproduction
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Homeostasis refers to
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Stable Internal Conditions
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Homeostatic mechanisms do not include
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Positive Feedback
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Which of the following provides the best example of a homeostativ mechanism
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Shivering that occurs as body temperature drops
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Water
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The most abundant chemical in the body
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A process in the body that causes conditions to move away from the normal state is called
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Positive Feedback
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Positive Feedback mechanism usually produce
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Unstable conditions which might seem incompatible with homeostasis
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The axial portion of the body includes
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Cranial Cavity Vertebral Canal Ventral Body Cavities
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The mediastinum seperates
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The thoracic cavity into two compartments which contain the right and left lungs
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Which of the following is not a part of the smaller cavities located within the head
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Pituitary Cavity
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Which of the following organs occupies the pelvic cavity
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Urinary Bladder
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The membrane on the surface of the lung is called
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Visceral Pleura
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A part that is closer to the head than something else is said to be
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Superior
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A section that seperates the body into let and right portions would be
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Sagittal Section
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When a body is in the anatomical position it is
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Standing erect with the face forward
