Answer the following statements true (T) or false (F)
1. An electron in the third energy level is closer to the nucleus than an electron in the second energy level.
2. All compounds are molecules, but not all molecules are compounds.
3. The bond between carbon and hydrogen in an organic compound is an example of a covalent bond.
4. Water is the most abundant solute in the body.
5. Chemical bonds can store potential chemical energy.
1. FALSE
2. TRUE
3. TRUE
4. FALSE
5. TRUE
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What activates the renin-angiotensin mechanism?
a) decreased body temperature b) decreased blood pressure c) increased body temperature d) increased blood pressure
During appositional growth of cartilage, the cells that produce the matrix are the
A. fibroblasts. B. chondroblasts. C. osteoblasts. D. osteocytes. E. chondrocytes.
Voltage-gated Na+ ion channels are sensitive to changes in the extracellular concentration of
A) Ca2+ ions. B) Cl- ions. C) K+ ions. D) proteins.
The thin layer of muscle in the wall of the GI tract that can change the shape of the lining is called the:
a. musocsa b. muscularis mucosa c. muscularis externa d. lamina propria