Which heart chamber lacks a group of pacemaker cells?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: A
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What will be an ideal response?
Lazy eye is also known as ________.
A. hyperopia B. myopia C. presbyopia D. amblyopia
The number of protons in an atom is represented by an element's
a) mass number. b) atomic number. c) atomic mass. d) valence number. e) None of these choices.
Miguel is a 25-year-old jogger with a target heart rate of 125 bpm. His resting pulse is 70 bpm. His blood volume is approximately 6.8 liters. At rest, his cardiac output is 6.3 liters/min.
A. What must his stroke volume be? B. What might his EDV and ESV be? C. During his workout, his heart rate increases to 125 bpm and his cardiac output to 12,500 mL/min. Do his SV, EDV, and ESV change with exercise?