WorksheetsBody Fluids
Total questions: 83
Worksheet time: 42mins
Which topic focuses on the distribution across body fluid compartments?
Body fluid compartments distribution overview
Intracellular and extracellular composition focus
General functions and roles of blood
Sequential steps of blood coagulation
Hormonal regulation of fluid volume
Which learning goal centers on comparing intracellular and extracellular fluid make-up?
Describe composition of ICF and ECF
Explain distribution of body compartments
Summarize major blood physiological roles
Outline cascade of clot formation
Discuss hormones controlling volume
A student aims to review why blood is essential. Which objective fits best?
Summarize the functions of blood
Explain distribution across compartments
Describe ICF versus ECF composition
Outline steps within coagulation
Discuss hormonal volume regulation
Which objective specifically addresses the coagulation cascade?
Outline the steps of blood coagulation
Summarize the functions of blood
Describe intracellular and extracellular composition
Explain distribution of fluid compartments
Discuss hormonal control of volume
Which objective targets endocrine control over body fluid volume?
Discuss hormonal control of body fluid volume
Outline the steps of blood coagulation
Summarize the functions of blood
Explain distribution of body fluid compartments
Describe composition of ICF and ECF
In a healthy adult, total body water is approximately what fraction of body weight?
About fifty percent of body weight
About sixty percent of body weight
About seventy percent of body weight
About eighty percent of body weight
Which statement best describes age-related differences in total body water percentage?
Newborns have about thirty percent water
Newborns have about seventy-five percent water
Elderly individuals exceed seventy percent water
Elderly individuals match adult sixty percent water
Proper hydration most directly supports which cellular function listed?
Production of bile pigments exclusively
Stability of subcellular structures
Formation of bone osteons only
Synthesis of hemoglobin chains
Which process depends on ion gradients maintained by hydration status?
Keratin deposition in hair shafts
Muscle contraction and nerve transmission
Glycogen storage in adipocytes
Vitamin D activation in kidneys
In a typical adult male, fluids account for roughly what proportion of total body mass?
About forty percent of total mass
About fifty percent of total mass
About sixty percent of total mass
About seventy percent of total mass
Which compartment contains approximately two-thirds of the total body water?
Plasma compartment within blood vessels
Interstitial fluid surrounding cells
Intracellular fluid inside cells
Transcellular fluid in specialized spaces
Within the extracellular fluid, the larger subcompartment by volume is which one?
Plasma at about eighty percent
Interstitial fluid at about eighty percent
Lymph at about eighty percent
Transcellular fluid at about eighty percent
Which factor most consistently lowers total body water percentage when comparing healthy adults?
Higher adipose tissue content
Higher skeletal muscle mass
Lower dietary sodium intake
Higher plasma protein levels
Approximately what fraction of body weight is intracellular fluid in a typical adult?
About ten percent of body weight
About twenty percent of body weight
About forty percent of body weight
About sixty percent of body weight
Approximately what fraction of body weight is extracellular fluid in a typical adult?
About ten percent of body weight
About twenty percent of body weight
About thirty percent of body weight
About forty percent of body weight
Which barrier primarily separates plasma from interstitial fluid?
Capillary wall with endothelial junctions
Cell membrane with lipid bilayer
Basement membrane of epithelia
Mitochondrial outer membrane
Which barrier primarily separates interstitial fluid from intracellular fluid?
Nuclear envelope with pores
Cell membrane with transporters
Capillary wall with fenestrations
Lysosomal membrane with pumps
Which ion is highest in concentration within the intracellular fluid under normal physiology?
Sodium near one hundred forty mmol per liter
Potassium near one hundred ten mmol per liter
Calcium near two millimoles per liter
Chloride near one hundred ten mmol per liter
Which statement best contrasts sodium distribution between compartments?
Sodium predominates in ICF at one hundred forty
Sodium predominates in ECF at one hundred forty
Sodium equal in ICF and ECF at seventy
Sodium predominates in plasma at ten millimoles
According to the diagrams, which combination most closely matches average daily water intake sources in adults totaling about 2 L/day?
Drink 1200 mL, food 500 mL, metabolism 300 mL
Drink 800 mL, food 900 mL, metabolism 300 mL
Drink 1500 mL, food 300 mL, metabolism 200 mL
Drink 1000 mL, food 700 mL, metabolism 300 mL
Which route accounts for the largest proportion of daily water loss in the steady-state adult shown?
Urine about 1200 mL per day
Expired air about 500 mL per day
Sweat about 200 mL per day
Feces about 100 mL per day
Which statement best defines insensible water loss as depicted?
Loss through lungs and skin not easily measured
Loss exclusively via urine collection methods
Loss only during heavy exercise sessions
Loss primarily through gastrointestinal secretions
Average insensible water loss is approximately how much per day in adults under moderate conditions?
About 500 mL per day
About 100 mL per day
About 1500 mL per day
About 50 mL per day
Which conditions are shown to increase insensible water loss?
High ambient temperature, exercise, fever
Low ambient temperature, sleep, fasting
High humidity, rest, hypothermia
Dehydration, low salt intake, anemia
In a steady state, the relationship between water intake and water loss is best described as:
Water intake equals water loss over time
Water intake exceeds water loss consistently
Water loss exceeds intake by small margin
Intake fluctuates more than any outputs
If extracellular fluid (ECF) osmolality acutely increases, what is the immediate water shift and cellular consequence shown?
Water moves from ICF to ECF causing cell dehydration
Water moves from ECF to ICF causing cell edema
No net water movement with unchanged cell volume
Water moves into plasma only causing hemoconcentration
A decrease in ECF osmolality produces which new equilibrium according to the diagram?
Water enters cells leading to cellular edema
Water leaves cells resulting in dehydration
Water evenly redistributes with no volume change
Water accumulates in interstitium without cell effect
Which statement best explains why severe diarrhea rapidly leads to dehydration in the figure?
Seven liters pass through the gastrointestinal tract daily
Total body water content is unusually low in adults
Diarrhea decreases metabolic water production markedly
Sweat losses exceed all other routes under rest
A febrile surgical patient in a hot ward is breathing fast. Based on the diagrams, which proactive measure most directly maintains fluid balance?
Increase fluid intake to match elevated insensible losses
Restrict fluids to reduce urinary output volume
Administer diuretics to prevent tissue edema
Reduce dietary sodium to lower ECF osmolality
Which statement best defines blood in human physiology?
A connective tissue composed of cells and plasma
A simple tissue made only of red cells
A glandular tissue secreting plasma hormones
A nervous tissue carrying electrical impulses
Which regulatory role is attributed to blood?
Maintain pH, temperature, fluid balance
Control bone growth and mineralization
Initiate nerve conduction and synapses
Produce bile salts in the small intestine
Which protective function is provided by blood?
Immune defense and coagulation
Mechanical support and leverage
Thermal insulation in adipose
Oxygen storage in myoglobin
Approximately what proportion of whole blood is plasma in healthy adults?
About fifty five percent by volume
About forty five percent by volume
About thirty percent by volume
About seventy five percent by volume
Which list correctly names major plasma proteins?
Albumin, globulins, fibrinogen
Myosin, actin, troponin
Collagen, elastin, keratin
Insulin, glucagon, cortisol
Which component is classified as a formed element of blood?
Erythrocytes circulating in vessels
Water dissolved in plasma
Glucose transported to tissues
Sodium ions balancing osmolarity
Which pairing matches a white blood cell type with a typical role?
Neutrophils performing phagocytosis
Basophils producing antibodies
Eosinophils forming fibrin strands
Lymphocytes releasing hemoglobin
Which description best fits platelets?
Small irregular fragments for clotting
Large nucleated cells for gas exchange
Elongated fibers for contraction
Spherical organelles for digestion
A patient loses plasma proteins, especially albumin. Which immediate physiological consequence is most likely?
Decreased oncotic pressure causing edema
Increased hemoglobin improving oxygenation
Elevated pH creating respiratory alkalosis
Enhanced clotting due to fibrin formation
Which blood function primarily involves O2 and CO2 transport via red blood cells?
Respiration by erythrocyte gas exchange
Nutrition through plasma solute delivery
Excretion through renal and pulmonary routes
Regulation of temperature and osmolarity
Which process best describes blood’s role in nutrient delivery to tissues?
Nutrition via plasmaborne substrates
Respiration via hemoglobin binding
Defense via leukocyte activity
Coagulation via fibrin meshwork
Removal of metabolic waste through kidneys, lungs, and skin is primarily a function of which system mediated by blood?
Excretion coordinating waste elimination
Homeostasis maintaining pH balance
Defense producing specific antibodies
Hormone transport distributing signals
Maintaining acid–base and fluid balance is most directly categorized under which blood function?
Homeostasis regulating internal balance
Defense against invading pathogens
Coagulation forming hemostatic plugs
Nutrition supplying cellular metabolites
Which statement best identifies a regulatory role of blood?
Controls water, temperature, osmotic pressure
Transports oxygen and carbon dioxide
Delivers amino acids and glucose
Forms fibrin to stop bleeding
Which component primarily mediates immune defense within blood?
White blood cells and antibodies
Platelets and thrombin complexes
Albumin and fatty acid binding
Erythrocytes and carbonic anhydrase
Which plasma protein is most responsible for maintaining plasma colloid osmotic pressure?
Albumin with broad ligand binding
Fibrinogen as fibrin precursor
Alpha globulins transporting lipids
Gamma globulins as immunoglobulins
Albumin binds several ligands. Which set is most consistent with its binding profile?
Fatty acids, bilirubin, Ca2+, steroids
Glucose, ketones, bicarbonate, urea
Iron, heme, hemoglobin, nitrate
Histamine, catecholamines, peptides
Gamma globulins mainly serve which role in the body?
Antibodies critical for immune defense
Carriers of steroid hormones
Precursors for fibrin formation
Buffers of extracellular pH
Which sequence correctly lists the three phases of hemostasis in order?
Vascular spasm, platelet plug, coagulation cascade
Platelet plug, vascular spasm, coagulation cascade
Coagulation cascade, platelet plug, vascular spasm
Vascular spasm, coagulation cascade, platelet plug
Which event is the main outcome of the coagulation cascade?
Formation of a fibrin clot that stabilizes the plug
Dilation of vessels to increase local blood flow
Activation of macrophages for wound debridement
Generation of nitric oxide to inhibit platelets
Which factor initiates the extrinsic pathway after endothelial injury?
Tissue factor exposure and factor VII activation
Collagen exposure activating factor XII
Platelet release of ADP and thromboxane
Calcium binding to gamma-carboxylated factors
Which sequence best represents the intrinsic pathway progression?
XII → XI → IX → VIII → X
VII → X → V → II → I
X → V → II → I → XIII
XII → VII → X → II → I
Which step belongs to the common pathway of coagulation?
Conversion of prothrombin (II) to thrombin (IIa)
Activation of factor XI by HMWK and kallikrein
Exposure of tissue factor with factor VIIa
Cross-linking fibrinogen to fibrin by platelets
Which cofactor pair assembles enzyme complexes on platelet membranes during coagulation?
Factors V and VIII serve as essential cofactors
Factors VII and IX serve as essential cofactors
Factors XI and XIII serve as essential cofactors
Factors II and I serve as essential cofactors
Vitamin K–dependent gamma-carboxyglutamate residues primarily serve what role in coagulation?
Anchor coagulation complexes via Ca2+ binding
Activate platelets through thromboxane synthesis
Trigger fibrinolysis by plasmin formation
Induce vasoconstriction through endothelin release
Which mnemonic helps recall the extrinsic and intrinsic initiation leading to factor X activation?
TENET: Tissue factor, Eleven, Nine, Eight, Ten
SEVEN-UP: Seven activates Nine using Platelets
VIVA: Five initiates via Vitamin K activation
CLOT: Collagen leads to One then Thirteen
A deficiency of factor VIII most directly disrupts which part of the cascade?
Intrinsic pathway amplification toward factor X
Extrinsic pathway initiation by tissue factor
Common pathway conversion of II to IIa
Stabilization of fibrin by factor XIIIa
Which change best explains why coagulation is localized at the injury site?
Assembly of enzyme complexes on platelet surfaces
Systemic vasoconstriction of upstream arteries
Widespread activation of anticoagulant proteins
Rapid washout of factors by high blood flow
Which immediate effect follows activation of factor X to Xa in the common pathway?
Prothrombin is converted to thrombin with factor V
Fibrinogen is degraded by plasmin into fragments
Tissue factor is released from endothelial cells
Factor XII is activated by exposed subendothelium
Which statement accurately links thrombin activity to clot stability?
Thrombin converts fibrinogen to fibrin and activates XIII
Thrombin degrades fibrin polymers and limits clotting
Thrombin activates tissue plasminogen to plasmin
Thrombin inhibits V and VIII to reduce amplification
Which coagulation regulators are directly inactivated by Protein C with Protein S as a cofactor?
Factors Va and VIIIa
Factors IXa and XIa
Prothrombin and fibrin
Tissue factor and vWF
Antithrombin III primarily inhibits which set of serine proteases in the coagulation cascade?
Thrombin, IXa, Xa, XIa
Va, VIIIa, XIIIa, VIIa
Plasmin, kallikrein, HMWK
vWF, fibrinogen, collagen
A patient with obstructive jaundice develops easy bruising. Which mechanism best explains the bleeding tendency?
Reduced vitamin K–dependent factors
Excess fibrin polymer stability
Hyperactive platelet aggregation
Increased thromboxane A2 release
During primary hemostasis, what molecule bridges platelets together to form the temporary plug?
Fibrinogen via GPIIb/IIIa
von Willebrand factor
Collagen type I
Thromboxane A2
Which event best characterizes platelet adhesion at a site of vascular injury?
vWF binding exposed collagen
ADP secretion from dense granules
TXA2 synthesis from arachidonic acid
Fibrin cross-linking by factor XIII
Platelet activation is most directly associated with which immediate release from platelets?
ADP, Ca2+, and thromboxane A2
vWF and factor VIII
Protein C and antithrombin
Plasmin and kallikrein
A new anticoagulant selectively enhances antithrombin III activity. Which laboratory change is most expected?
Reduced thrombin and factor Xa activity
Increased factor Va activity
Enhanced fibrin cross-link formation
Elevated thromboxane A2 levels
A patient has lifelong mucosal bleeding and prolonged bleeding time. Lab studies show defective GPIb function. Which step of primary hemostasis is impaired?
Platelet adhesion to vWF-collagen
Platelet activation granule release
Platelet aggregation via fibrinogen
Fibrin mesh stabilization
Which hormone primarily increases water reabsorption in the collecting ducts by inserting aquaporin-2 channels?
ADH released from posterior pituitary
ANP released from atrial myocytes
Aldosterone from adrenal medulla
Angiotensin II from pancreatic cells
Aldosterone’s renal effect is best described as which combination of ion movements?
Increase Na+ reabsorption and decrease K+
Decrease Na+ reabsorption and increase K+
Increase Na+ excretion and increase K+
No change in Na+ and decrease K+
Which hormone is secreted from atrial myocytes in response to stretch and promotes natriuresis?
ANP increasing Na+ and water excretion
ADH decreasing water excretion strongly
Aldosterone increasing Na+ retention mostly
Renin increasing Na+ reabsorption directly
During low renal perfusion pressure, renin release initiates a cascade. Which subsequent product causes systemic arteriolar vasoconstriction?
Angiotensin II formed by ACE
Angiotensin I formed by renin
Aldosterone from adrenal cortex
ADH from posterior pituitary
Which pairing of hormone and source is correct?
ADH — posterior pituitary gland
ANP — ventricular myocytes primarily
Aldosterone — adrenal medulla region
Angiotensin II — pancreatic islets mainly
A patient has high plasma potassium. Which hormone’s secretion would most directly increase to promote potassium excretion?
Aldosterone enhancing K+ secretion
ADH reducing K+ secretion mainly
ANP increasing K+ retention usually
Angiotensin II blocking K+ secretion
Which sequence correctly traces the RAAS pathway from trigger to effector outcomes?
Low perfusion → renin → Ang I → ACE → Ang II
High perfusion → renin → Ang II → ACE → Ang I
Low perfusion → ACE → Ang I → renin → Ang II
High sodium → renin → ACE → Ang II → Ang I
Which deficiency most directly causes prolonged bleeding in Hemophilia A?
Factor VIII deficiency in the coagulation cascade
Platelet GPIb deficiency affecting adhesion
Vitamin K deficiency impairing gamma-carboxylation
Fibrinogen deficiency lowering clot firmness
A patient presents with extensive ecchymoses on the arm and abdomen. Anticoagulants are being used concurrently with a lupus anticoagulant. Which pathophysiologic process best explains the bruising pattern?
Autoantibody-mediated Factor VIII inhibition with impaired clotting
Platelet overactivation causing microthrombi and purpura
Excess ADH leading to water retention and dilutional anemia
Reduced albumin causing low oncotic pressure edema
Which condition most likely leads to edema by reducing plasma oncotic pressure?
Hypoalbuminemia decreasing colloid osmotic pressure
SIADH increasing total body sodium content
Thrombosis blocking lymphatic drainage globally
Hemophilia A causing capillary hydrostatic failure
A postoperative patient develops an inappropriate clot in a deep vein. Which best characterizes this complication?
Thrombosis due to inappropriate clot formation
Hemophilia due to intrinsic pathway failure
Edema due to reduced plasma proteins
Hyponatremia due to renal salt wasting
A patient with excessive ADH secretion shows altered fluid volume. Which paired disorder shows the opposite defect in ADH action?
Diabetes insipidus with reduced ADH effect
Hypoalbuminemia with excess ADH effect
Thrombosis with increased ADH production
Hemophilia A with absent ADH signaling
Which statement best describes total body water distribution in a healthy adult?
Sixty percent of body weight is total body water
Forty percent of body weight is total body water
Seventy percent of body weight is total body water
Thirty percent of body weight is total body water
A patient has hyponatremia. Which compartment is sodium the principal cation of under normal physiology?
Extracellular fluid compartment
Intracellular fluid compartment
Transcellular fluid compartment
Intravascular cell compartment
Which pairing correctly matches hormone with its primary role in fluid homeostasis?
ADH increases water reabsorption in kidneys
ANP increases aldosterone secretion directly
Aldosterone decreases sodium reabsorption distally
ADH decreases collecting duct permeability
A trauma patient is bleeding profusely. Which sequence best explains the initiation routes leading to the common coagulation pathway?
Intrinsic and extrinsic pathways converge to common
Common pathway activates intrinsic then extrinsic
Extrinsic pathway inhibits intrinsic pathway entirely
Intrinsic pathway activates fibrinolysis preceding clot
