★ Circulation and Excretion Quiz
Which of the following mechanisms are used to regulate blood pressure in the closed circulatory system of vertebrates?
A. changing force of the contraction of the heart
B. constricting and relaxing sphincters in the walls of arterioles
C. adjusting the volume of the blood in the veins
D. all the above
E. only a and b
Select your answer:
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Infectious Diseases & the WHO Digestion and Microbes Physical Fitness Components Health Unit Coordinating Paeds Edema The Microbial World Skel, Musc, Nerv, Circ, Resp Levels of Organization How the Eyes work Muscularskeletal System Physical Activity Health and Medicine Endocrine System Terms Advanced Stretching SM2 Anatomy BonesOther quiz:
Biology › Viewthe wall of the ventricle is thicker than that of the atrium
A. TRUE
B. FALSE
First Aid Bleeding › View
Which of the types of bleeding requires very little attention?
A. arterial bleeding
B. capillary bleeding
C. all the above