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5 Written questions

5 Matching questions

  1. pump
  2. the pacemaker and control of heartbeat
  3. organisms with closed systems
  4. rate is regulated by...
  5. varicose veins
  1. a 1. pacemaker generates electrical impulses
    2. impulses spread through the atria
    3. impulses reach the ventricles
  2. b vertebrates, worms, etc.
  3. c 1. vagus nerve (slows down heart rate)
    2. cardio accelerator (speeds up heart rate)
    3. horomones (epinephrine increases h.r.)
    4. emotions, coffee/tea, body temp.
  4. d something to force fluid throughout the organism
  5. e - 'knotted' appearance
    - veins swell because valves wont close properly and sections get overfilled

5 Multiple choice questions

  1. a tough, protective membrane that covers the heart
  2. - carries blood away from heart
    - majority carries oxygenated blood to body cells
    - smooth muscle causes to be thicker
    - only aortic and pulmonary arteries have valves
  3. the pacemaker: specialized group of muscle cells in right atrium
    - initiates its own impulses to for the heart to contract
  4. -blood is not always contained in tubes
    -open ended vessels
    -fluid directly bathes cells
  5. valve doesn't close all the way
    - wushing sound in heart beat
    - can be born with one
    - watch bicuspid valve more closely because can result in a "large heart"
    - replace valve with sheep, pig, artificial, or organ donor valve
    - back flow of blood
    - can be result of untreated strep throat where bacteria attacks valve= Rheumatic fever

5 True/False questions

  1. septumseparates the right and left sides and prevents the mixing of blood

          

  2. heart's natural pacemakerthe number of heart beats per minute

          

  3. organisms with open systeminsects, arthropods, mollusks (clams and scallops), etc.

          

  4. cardiac cycle: 2 phasesinvoluntary muscle
    - individual cells with single nucleus per cell
    - forms branching interlocking network to withstand force of contractions

          

  5. coronary- carries blood away from heart
    - majority carries oxygenated blood to body cells
    - smooth muscle causes to be thicker
    - only aortic and pulmonary arteries have valves