Higher viscosity of blood will increase the amount of stress placed on the heart while it is pumping. Viscosity of blood is highest when ________
A) hemoglobin levels are lowest
B) plasma levels are highest
C) hematocrit is highest
D) HbA1C levels are lowest
C
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What determines the movement of blood in systemic veins?
A. The contraction and relaxation of skeletal muscles B. The decrease of thoracic pressure and increase of abdominal pressure due to diaphragm movement C. Valves in the veins D. The blood pressure difference between systemic capillaries and the right atrium E. All of the these
The mucous membrane or mucosa of the respiratory system
A) is present as the lining of the alveoli. B) consists of respiratory epithelial cells overlying a layer of loose connective tissue, the lamina propria. C) contains an epithelium that differs from that of the larynx. D) surrounds a thick layer of connective tissue, the submucosa. E) None of the answers are correct.
Which respiratory pigment is found only in annelids?
a. erthyrocruorin b. chlorocruorin c. hemerythrin d. erthyrocruorin and chlorocruorin e. all of these are present in phylum Annelida.
End-diastolic volume minus end-systolic volume is equal to
A. cardiac output. B. cardiac reserve. C. pulse volume. D. venous return. E. stroke volume.