Final answer:
The normal PCV in dogs is about 45%, which is represented by option A). The PCV or hematocrit is the volume percentage of erythrocytes in blood, with a normal range for humans influenced by factors like gender.
Step-by-step explanation:
The normal packed cell volume (PCV) or hematocrit in dogs is about 45%. Given the options provided: A) 45%. B) 38%. C) 58%. D) 35%. The correct answer is A) 45%. Hematocrit represents the volume percentage of red blood cells (erythrocytes) in whole blood. Normal hematocrit values can vary and are influenced by factors such as gender; for humans, they range from 37 to 47 for females, and from 42 to 52 for males.
Considering a patient's hematocrit is 42 percent, approximately 58% of the patient's blood would be plasma. This is because plasma makes up the percentage of blood that is not erythrocytes (100% minus the percentage of erythrocytes).