Biology (Raven), 9th Edition

Chapter 50: The Circulatory System

Pre-Test

1
Plasma is 92% water plus
A)nutrients.
B)hormones.
C)ions.
D)plasma proteins.
E)all of these
2
The circulatory fluid in organisms with an open circulatory system is called:
A)Blood.
B)Plasma.
C)Hemolymph.
D)Formed elements.
E)Coelomic fluid.
3
The heart of birds and mammals
A)is strikingly similar due to convergent evolution.
B)is four chambered due to common ancestry.
C)is divergent due to adaptive radiation.
D)is similar in function but very different structure.
E)is similar in structure but very different in function.
4
Contraction of the heart muscle is initiated by
A)the AV node.
B)the sympathetic nervous system.
C)the parasympathetic nervous system.
D)somatic nervous system.
E)autorhythmic cells.
5
The lymphatic system handles fluids that leave the
A)cardiovascular system.
B)excretory system.
C)spleen.
D)heart.
E)brain.
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