Regarding the structure of DNA, which of the following is covalently bonded to a nitrogen base?
A) Ribose
B) Deoxyribose
C) Hydrogen bonds
D) Phospholipid
E) Phosphate
B
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The white matter differs from gray matter in
that
a. white matter is found in the brain, and gray matter is found in the spinal cord. b. white matter consists of bundles of myelinsheathed axons, and gray matter consists of cell bodies, dendrites, and neuroglial cell. c. white matter transmits sensory information, and gray matter transmits motor information. d. white matter is associated with the sympathetic nervous system, and gray matter is associated with the parasympathetic nervous system. e. all of these are true.
The respiratory pacemaker center is located in the ____
a. spinal cord b. lungs c. frontal lobe d. brain stem e. diaphragm
Myocardial infarction, also called a heart attack,
A) is caused by excessive blood pressure in the heart. B) actually causes no permanent damage to the heart. C) is unrelated to cigarette smoking. D) is the damage or death of cardiac muscle tissue.
When a virus takes over the metabolism of a cell, it forces the cell to manufacture which of the following?
a) more mitochondria for energy for the virus b) more liposomes to isolate themselves from water c) more food particles d) more viruses e) more bacteria