Biology 2601A/B Lecture Notes - Lecture 15: Circulatory System, Teleost, Heart
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1) At what point is the amount of oxygen at its highest?
in the capillaries during strenous activity | ||
in the lungs | ||
in the capillaries at rest | ||
in muscle tissue during strenous activity |
2) You have diagnosed a patient with an iron deficiency. Themost likely result of this is
low carbon dioxide content | ||
very red blood | ||
low oxygen content | ||
high oxygen content |
3) Why are insects limited to relatively small sizes?
Their respiratory system relies on diffusion which is slow overlong distances | ||
Their respiratory muscles are smooth muscle only | ||
They have a closed circulatory system | ||
Their exoskeleton cannot support larger-bodied animals |
4) Air rushes into the lungs of humans during inhalationbecause
the volume of the thoracic cavity increases | ||
pressure in the alveoli increases | ||
the diaphragm contracts and pushes upward on the chestcavity | ||
smooth muscle lining the trachea and bronchi contracts andcauses their volume to increase |