Question 3 (1 point) 1) Litien Which of the following characteristics of blood are false (choose all that apply)? 1) the temperature of blood typically runs slightly lower than body temperature 2) deoxygenated blood has a dark scarlet or bluish tint 3) blood is more viscous than water 4) blood is just slightly acidic 5) the average male has about $$ 4-5 $$ liters of blood in his body Question 4 (1 point) Listen $$ 93 \% $$ of blood is water. 1) True 2) False Question 5 (1 point) Listen Electrolytes are a component of blood plasma. 1) True 2) False

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**Question 3**

We must identify the statements that are false.

1. **Statement 1:** “The temperature of blood typically runs slightly lower than body temperature.”  
   - In a healthy individual, core blood temperature is essentially the same as body temperature (about $$37^\circ$$C). Although blood in the extremities can be cooler, the statement as given is misleading.  
   - **This statement is false.**

2. **Statement 2:** “Deoxygenated blood has a dark scarlet or bluish tint.”  
   - Deoxygenated blood is darker than oxygenated blood. It is often described as a dark red (or maroon) color. The reference to a “bluish” tint is a misconception; blood does not actually turn blue, even though veins may appear blue through the skin.  
   - **This statement is false.**

3. **Statement 3:** “Blood is more viscous than water.”  
   - Blood contains cells and plasma proteins that make it much more viscous than water.  
   - **This statement is true.**

4. **Statement 4:** “Blood is just slightly acidic.”  
   - Blood pH is tightly regulated around $$7.35$$ to $$7.45$$, which is slightly alkaline, not acidic.  
   - **This statement is false.**

5. **Statement 5:** “The average male has about $$4	ext{–}5$$ liters of blood in his body.”  
   - While blood volumes can vary among individuals, a typical adult male has approximately $$5$$–$$6$$ liters. The range $$4	ext{–}5$$ liters is a bit on the lower edge but is generally acceptable in many contexts.  
   - **This statement is essentially true.**

Thus, the false statements are **1, 2, and 4**.

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**Question 4**

The statement given is: “$$93\%$$ of blood is water.”

- Blood is composed of plasma (which is about $$90\%$$ water) and formed elements (cells) that also contain water (though at a lower percentage). When averaged over whole blood, the overall percentage of water is lower than $$93\%$$.
- Therefore, the statement is an overestimate when applied to whole blood.

**Answer:** False

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**Question 5**

The statement is: “Electrolytes are a component of blood plasma.”

- Blood plasma contains various electrolytes, such as sodium, potassium, calcium, chloride, bicarbonate, and others. These are essential for maintaining osmotic balance and proper cell function.

**Answer:** True
**Question 3** - **False Statements:** 1, 2, and 4 **Question 4** - **False** **Question 5** - **True**

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