Cells are to tissues as tissues are to
A. organs.
B. systems.
C. organelles.
D. molecules.
Answer: A
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At the molecular level, what are the effects of nicotine on the nervous system? How are these effects exerted? How are these effects similar to or different from those of curare? How do these effects explain some of the physiological consequences of smoking?
What will be an ideal response?
Which carries oxygenated blood from the lungs to the heart?
A. Pulmonary arteries B. Pulmonary veins C. Pulmonary trunk D. Inferior vena cava E. Superior vena cava
The chest is superior to the head.
Indicate whether this statement is true or false.
Which layer of the digestive wall is connective tissue that provided distensibility and elasticity?
a. mucosa b. submucosa c. muscular layer d. serosa e. myenteric plexus