Which of the following does not correctly characterize blood?
The pH range of blood falls between 7.35 and 7.45 .
Blood is cooler than body temperature.
Blood accounts for a volume of 5 to 6 liters in healthy adults.
The color of blood ranges from scarlet red to dark red or purple depending on the level
of oxygenation.

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UpStudy AI · Accepted Answer

1. **Option Analysis:**

- **pH of Blood:**  
     Blood has a narrow $$ pH $$ range between $$ 7.35 $$ and $$ 7.45 $$, which is correct.

- **Volume of Blood:**  
     In healthy adults, the blood volume is typically about $$ 5 $$ to $$ 6 $$ liters, which is also correct.

- **Color of Blood:**  
     The color of blood ranging from scarlet red (when oxygenated) to dark red or purple (when deoxygenated) correctly describes the appearance of blood.

- **Temperature of Blood:**  
     The statement that "blood is cooler than body temperature" is problematic because blood in the core is maintained at approximately body temperature (around $$ 37^\circ $$C). While blood might cool slightly as it reaches peripheral tissues, characterizing it as generally cooler than body temperature is not accurate.

2. **Conclusion:**

The characteristic that does not correctly describe blood is:

- **Blood is cooler than body temperature.**
Blood is cooler than body temperature does not correctly describe blood.

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