BIO 252 ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS COMPLETE STUDY GUIDE

BIO 252 ACTUAL EXAM QUESTIONS AND
CORRECT ANSWERS COMPLETE STUDY
GUIDE

●● Lumen
Answer: Interior of a tubular structure such as a blood vessel or a portion
of the alimentary canal through which blood, chyme, or other substances
travel.


●● Vein
Answer: Blood vessel that conducts blood toward the heart.


●● Platelets (thrombocytes)
Answer: Aid in blood clotting


●● Leukocytes (white blood cells)
Answer: Involved in immune response.


●● Erythrocytes (red blood cells)
Answer: Transport oxygen and carbon dioxide.


●● Plasma

, Answer: The liquid part of blood, making up about 55% of its volume.
Contains water, proteins, electrolytes, nutrients, hormones, and waste
products.


●● Formed elements
Answer: The cellular components of blood, making up about 45% of its
volume.


●● Albumin
Answer: Plasma protein produced in the liver. Helps regulate colloid
osmotic pressure.


●● Colloid osmotic pressure
Answer: Acts like a fluid magnet; pulls fluid into the blood vessels and
help regulate blood volume and pressure.


●● Erythrocytes (function)
Answer: Transport oxygen and carbon dioxide


●● Erythrocytes (structure and lifespan)
Answer: Bioconcave, no nucleus, no mitochondria, consists of
hemoglobin.
Only lives for 120 days.