A muscle fiber is a ________.
A) actin molecule
B) myosin molecule
C) muscle cell
D) bundle of actin and myosin inside of a muscle cell
Ans: C) muscle cell
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Answer the following statements true (T) or false (F)
1. Cardiac veins empty into the superior vena cava, which drains into the right atrium. 2. One function of arteries is to serve as blood reservoirs. 3. In the capillaries, glucose and carbon dioxide move in opposite directions. 4. A heart that is beating weakly will cause a drop in the central venous pressure. 5. Normal average diastolic pressure is about 120 mm Hg.
The term "metabolism" refers to
A. all the chemical reactions in the body. B. reactions involving the synthesis of complex molecules from simpler ones. C. reactions involving the breakdown of complex molecules into simpler ones. D. reactions involving the breakdown of complex molecules or the exchange of atoms between similarly sized reactants. E. digestive system reactions that are either catabolic or exchange reactions.
Define puberty
What will be an ideal response?
Water may move through membrane pores constructed by transmembrane proteins called ________.
Fill in the blank(s) with the appropriate word(s).