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ASU BIO 202 Exam 1 Questions & Answers
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ASU BIO 202 Exam 1 Questions & Answers
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ASU BIO 202 Exam 1 Questions & AnswersChapter 18 Blood - CORRECT ANSWER-....
Describe the functions and properties of blood - CORRECT ANSWER-Transports
:
O2 from lungs to organs/cells
CO2 from cells to lungs
Nutrients from digestive system & storage
Wastes to liver & kidneys
Hormones
Regulates body temperature (transports heat out to skin)
Immunity (white blood cells)
Clotting (platelets)
Stabilizes water balance
Stabilizes pH - buffer for acids & bases
Explain why blood is a connective tissue - CORRECT ANSWER-more matrix vs
cells
Adults have ____ L of blood - CORRECT ANSWER-4-6 L of blood average
about 5
List the components of blood and their average amounts - CORRECT
ANSWER-plasma, a clear extracellular fluid (55% of blood
Formed elements - blood cells and platelets
Mean erythrocyte (RBCs) count - 4.2-6.2 million/ml
Mean leukocyte (WBCs) count - 5,000-10,000/ml
Mean platelet count - 130,000-400,000/ml
, List the major types of WBCs - CORRECT ANSWER-Granulocytes - have
cytoplasmic granules
Neutrophils
Eosinophils
Basophils
Agranulocytes - no cytoplasmic granules
Lymphocytes (T-cells & B-cells)
Monocytes & Macrophages
Explain hematocrit and list average percentages - CORRECT
ANSWER-Hematocrit is % of total volume that is actual cells
Erythrocytes are heaviest and settle first
-37% to 52% total volume
White blood cells & platelets
-1% total volume
Buffy coat
-leukocytes and platelets
Plasma
-47% to 63%
Explain the significance of blood viscosity and osmolarity, and how changes in
viscosity and osmolarity affect the body. - CORRECT ANSWER-Viscosity -
resistance to flow (thickness/stickyness)
-Too many or too few red blood cells changes the viscosity of blood and puts a
strain on the heart
Osmolarity - total molar concentration of dissolved particles in 1 L of solution due
to transfer of nutrients and wastes between the blood & tissue fluids
-If too high: bloodstream absorbs too much fluid from the tissues, thus causing
hypertension (high BP)
-If too low: bloodstream transfers too much fluid to tissues, resulting in edema
and hypotension (low BP)
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