Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   Carbon dioxide binds the iron of heme just as oxygen does.

   Statements

   1. About 70 percent of carbon dioxide travels as bicarbonate.
   2. Carbon dioxide binds the iron of heme just as oxygen does.
   3. About 20 percent of carbon dioxide rides on hemoglobin.

2. False statement

   A higher temperature makes hemoglobin hold oxygen tighter.

   Statements

   1. A more acidic pH makes hemoglobin release oxygen faster.
   2. BPG made by erythrocytes helps oxygen leave hemoglobin.
   3. A higher temperature makes hemoglobin hold oxygen tighter.

3. False statement

   Hemoglobin saturated with oxygen binds carbon dioxide readily.

   Statements

   1. Hemoglobin saturated with oxygen binds carbon dioxide readily.
   2. Only about 1.5 percent of oxygen travels dissolved in plasma.
   3. Fetal hemoglobin holds oxygen more tightly than the adult form.

4. False statement

   Erythrocytes make most of their ATP inside mitochondria.

   Statements

   1. The chloride shift swaps bicarbonate for chloride ions.
   2. Erythrocytes make most of their ATP inside mitochondria.
   3. Each hemoglobin molecule can carry up to four oxygen molecules.

Instructions

Tap the false statement in each set of three.

Explanation