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AP Intermediate 1st Year Body Fluids and Circulation — practice questions

Explore 50 free Body Fluids and Circulation questions in AP Intermediate 1st Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Body Fluids and Circulation questions and exercises with answers

Showing questions 1–30 of 50.

Blood is BEST classified asRead the answer and worked solution →Plasma constitutes approximately what fraction of blood by volume?Read the answer and worked solution →The pigment that gives erythrocytes their red colour isRead the answer and worked solution →The average lifespan of a human red blood cell is aboutRead the answer and worked solution →Which leucocyte is the MOST abundant in human blood?Read the answer and worked solution →Persons with blood group O are calledRead the answer and worked solution →The pacemaker of the human heart is theRead the answer and worked solution →The first heart sound ('lub') is produced byRead the answer and worked solution →Normal resting blood pressure of a healthy adult is approximatelyRead the answer and worked solution →Hepatic portal system carries blood fromRead the answer and worked solution →Plasma without clotting factors is calledRead the answer and worked solution →Granulocytes among WBCs includeRead the answer and worked solution →Phagocytic cells of the immune system includeRead the answer and worked solution →Blood group AB individuals haveRead the answer and worked solution →Erythroblastosis foetalis occurs whenRead the answer and worked solution →Fibrin clot is formed in blood coagulation fromRead the answer and worked solution →A 3-chambered heart is characteristic ofRead the answer and worked solution →Cardiac output is BEST defined asRead the answer and worked solution →The P-wave of an ECG representsRead the answer and worked solution →Lymph differs from blood in that lymphRead the answer and worked solution →In the cardiac cycle, ventricular pressure rises sharply duringRead the answer and worked solution →Adrenal medullary hormones canRead the answer and worked solution →The bicuspid (mitral) valve is located betweenRead the answer and worked solution →The myogenic nature of the heart means thatRead the answer and worked solution →During joint diastole of the cardiac cycle, blood flows fromRead the answer and worked solution →Coronary Artery Disease (atherosclerosis) is caused byRead the answer and worked solution →In a fish, the heart pumpsRead the answer and worked solution →Sympathetic stimulation of the heartRead the answer and worked solution →The thickest layer of the wall of an artery is theRead the answer and worked solution →Heart failure is BEST distinguished from cardiac arrest in thatRead the answer and worked solution →

Worked practice questions

Blood is BEST classified as

  1. A special connective tissue with fluid matrix
  2. A simple epithelial tissue with secretions
  3. A skeletal muscle tissue with fibres
  4. A nervous tissue with conducting cells
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Correct answer: A. A special connective tissue with fluid matrix

Blood is a fluid connective tissue with plasma as its matrix and formed elements (RBCs, WBCs, platelets) suspended within.

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Plasma constitutes approximately what fraction of blood by volume?

  1. Around 25 per cent of total blood volume
  2. Around 55 per cent of total blood volume
  3. Around 75 per cent of total blood volume
  4. Around 90 per cent of total blood volume
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Correct answer: B. Around 55 per cent of total blood volume

Plasma is roughly 55% of blood. Formed elements make up the remaining 45%. Plasma itself is 90-92% water and 6-8% proteins (albumins, globulins, fibrinogen).

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The pigment that gives erythrocytes their red colour is

  1. Bilirubin from the liver bile
  2. Haemoglobin containing iron groups
  3. Carotene from the diet of plants
  4. Myoglobin found in muscle cells
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Correct answer: B. Haemoglobin containing iron groups

Haemoglobin is the iron-containing complex protein in RBCs that binds oxygen. A healthy individual has 12-16 g of haemoglobin per 100 mL of blood.

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