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WorksheetsOverview and Functions of Blood
Total questions: 48
Worksheet time: 24mins
Which statement best describes blood as a tissue?
A nervous tissue specialized for impulses
An epithelial tissue lining organ surfaces
A muscular tissue containing actin and myosin
A fluid connective tissue with living cells
What is the main function of blood emphasized in this overview?
Energy storage in adipose deposits
Electrical signaling between tissues
Mechanical support for internal organs
Transport of substances throughout the body
Blood cells (formed elements) are suspended in which nonliving component?
Stroma, the structural mesh
Plasma, the liquid matrix
Myelin, the lipid sheath
Interstitium, the tissue space
Which set lists primary transport roles of blood?
Generating ATP in mitochondria
Producing cartilage and bone
Transporting hormones to target organs
Removing cellular wastes like CO2
Carrying oxygen and nutrients
Which mechanisms help blood regulate homeostasis?
Initiating nerve impulses
Maintaining fluid volume
Secreting digestive enzymes
Acting as buffers to maintain pH
Absorbing and distributing heat
Match each blood function category with an example role.
Transport
Moving hormones to organs
Regulation
Acting as buffers for pH
Protection
Clotting to prevent blood loss
Which process illustrates blood’s protective role against infection?
Delivering glucose to hepatocytes
Absorbing heat in skeletal muscle
Exchanging gases in alveolar sacs
Carrying antibodies and white blood cells
Which scenario best explains how blood contributes to temperature homeostasis?
Storing heat within red blood cells
Redistributing heat through blood flow
Increasing oxygen solubility in plasma
Blocking hormone receptors on cells
When whole blood is centrifuged, which layer occupies about 55% of the volume?
Red cell pellet at bottom
Buffy coat in the middle
Dissolved gases layer
Plasma layer at the top
Which statement best describes the buffy coat observed after centrifugation?
Thin layer of leukocytes and platelets
Region of plasma proteins only
Thick band of erythrocyte aggregates
Layer of dissolved nutrients and water
Match each blood component to its primary function.
Plasma
Carries dissolved proteins and solutes
Leukocytes
Defends against foreign substances
Platelets
Forms clots to stop bleeding
Erythrocytes
Transports O2 and CO2
Plasma is mainly composed of which proportion of water and solutes?
About 75% water, 25% solutes
About 10% water, 90% solutes
About 50% water, 50% solutes
About 90% water, 10% solutes
Which set correctly identifies formed elements of blood?
Erythrocytes
Leukocytes
Platelets
Plasma
Which component primarily transports oxygen between lungs and tissues?
Plasma carrying clotting factors
Platelets forming fibrin plugs
Leukocytes with antibodies
Erythrocytes containing hemoglobin
During centrifugation, why do erythrocytes form the bottom layer?
They have the greatest density
They are attracted to the rotor
They dissolve into plasma
They are repelled by leukocytes
Which components together make up less than 1% of whole blood by volume?
Water and dissolved gases
Plasma proteins only
Erythrocytes alone
Leukocytes and platelets
Select all items primarily found dissolved in plasma.
Plasma proteins
Glucose
Electrolytes
Hemoglobin
Which change would most directly increase the thickness of the buffy coat after centrifugation?
Elevated leukocyte and platelet counts
Higher plasma water content
Reduced erythrocyte hemoglobin
Lower blood temperature
Which feature of erythrocytes most directly enhances gas exchange efficiency in capillaries?
Spherical rigid shape reduces turbulence
Flattened biconcave shape increases surface area
Presence of nucleus improves metabolic control
Thick cytoplasm slows oxygen diffusion
What proportion of the protein content in mature red blood cells is hemoglobin?
Approximately ninety-seven percent
About half of total proteins
Roughly one-quarter of proteins
Nearly one hundred percent
Which statement best explains why mature erythrocytes can squeeze through narrow capillaries?
They actively divide to change their shape
They store glycogen for rapid energy release
They have abundant microtubules for pushing
They lack organelles and are highly flexible
Hemoglobin can bind oxygen effectively because it contains which essential element?
Calcium in heme groups
Iron in the ferrous state
Sodium within globin chains
Potassium bound to porphyrin
Match each term to its correct description.
Hemoglobin
Protein that binds and carries oxygen
Erythrocyte
Red blood cell specialized for transport
Biconcave shape
Geometry increasing surface area and flexibility
Iron (Fe2+)
Element in hemoglobin that binds oxygen
What is hematopoiesis?
Formation of blood cells from stem cells
Immune response to foreign antigens
Destruction of old blood cells
Clotting cascade activation in vessels
Where are stem cells that replace most blood cells primarily located?
Yellow bone marrow cavities
Red bone marrow niches
Cardiac muscle tissue
Peripheral lymph nodes
Which hormone regulates the formation of red blood cells and is mainly produced in the kidneys?
Erythropoietin released by kidneys
Thrombopoietin secreted by spleen
Calcitonin produced by thyroid
Aldosterone from adrenal cortex
Which physiological trigger increases erythropoietin release?
Elevated body temperature during fever
Increase in plasma glucose concentration
Drop in normal blood oxygen levels
Rise in blood calcium levels
Select all statements that are true about mature red blood cells.
Their shape optimizes gas exchange
They primarily consist of hemoglobin proteins
They have no nucleus or other organelles
They divide frequently in circulation
Which event happens first when a blood vessel is injured?
Smooth muscle contracts to narrow vessel
Fibrin creates a stabilizing mesh
Red cells seal the wound opening
Platelets form an adhesive plug
During vascular spasm, what directly causes reduced blood flow at the injury site?
Vasoconstriction of smooth muscle
Conversion of fibrinogen into fibrin
Platelet adhesion to exposed collagen
Endothelial dilation of the vessel wall
Select all steps that primarily involve platelets rather than fibrin.
Polymerization forming a mesh-like clot
Release of factors that activate more platelets
Aggregation to form a temporary plug
Initial vessel narrowing after injury
Match each hemostasis step to its key outcome.
Vascular spasm
Vessel narrows to slow blood loss
Platelet plug formation
Temporary plug of adhered platelets
Coagulation
Fibrin mesh stabilizes final clot
Which statement best describes coagulation in hemostasis?
Red blood cells trigger vasoconstriction
Smooth muscle dilates to increase flow
Fibrin proteins form a mesh-like clot
Platelets attach and close the wound quickly
Which statement best describes antigens on red blood cells?
Enzymes that digest clots inside vessels
Proteins secreted by plasma to fight infection
Surface markers that trigger immune responses
Molecules that neutralize pathogens in plasma
Antibodies cause agglutination by doing what to foreign cells?
Activating platelets to form a clot
Binding antigens and clumping cells together
Tagging red cells for liver filtration
Breaking cell membranes with enzymes
In blood typing, what are agglutinogens specifically?
Plasma antibodies against A or B
RBC antigens determining ABO types
Rh factors on white cells
Serum proteins enhancing clotting
Which blood type has both A and B agglutinogens on RBCs?
Type A has only A antigens
Type AB has A and B antigens
Type O lacks A and B antigens
Type B has only B antigens
A person with type A blood will have which antibodies in plasma?
No anti-A or anti-B
Both anti-A and anti-B
Anti-A antibodies present
Anti-B antibodies present
Which blood type has no anti-A or anti-B antibodies in plasma?
Type AB lacks both antibodies
Type A lacks anti-A only
Type B lacks anti-B only
Type O lacks neither antibody
Who can receive blood from all ABO types?
AB recipients accept A, B, AB, O
B recipients accept B and O
A recipients accept A and O
O recipients accept only O
Which donor can give to all ABO recipients?
Type O donors to all types
Type AB donors to AB only
Type A donors to A and AB
Type B donors to B and AB
Match each ABO blood type to its antibodies in plasma.
Type AB
None
Type A
Anti-B
Type B
Anti-A
Type O
Anti-A and Anti-B
Match each ABO blood type to agglutinogens found on RBCs.
Type AB
A and B
Type A
A
Type B
B
Type O
None
Rh positive individuals can accept which Rh status safely?
Both positive and negative units
Only positive units safely
Only negative units safely
Neither status safely
Why can Rh negative individuals not receive Rh positive blood?
They lack anti-Rh antibodies
They neutralize all Rh antigens
They have Rh antigens already
They form anti-Rh antibodies
Which statement about Rh antigens is accurate?
Absence allows receiving positive blood
Absence prevents any agglutination
Presence means anti-Rh produced
Presence means no anti-Rh made
How many distinct blood types result from independent ABO and Rh sorting?
Eight unique combinations exist
Four unique combinations exist
Six unique combinations exist
Ten unique combinations exist
Select all donors compatible for a recipient with B− blood.
B− donors are compatible
AB− donors are compatible
B+ donors are compatible
O− donors are compatible
