Free Circulation MCQs with Answers
695 Circulation MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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Read the Circulation notesFree MDCAT chapter notes with key terms695 questions · page 32 of 35
- A. Whom could they choose but the man who had worked for it all those years?
- B. To whom could they choose but the man who had work for it all those years?
- C. Which could they choose but the man who had work for it all those years?
- D. Whose could they choose but the man who had work for it all those years?
Explanation: This option is correct. "Whom" is used correctly here as the object of the verb "choose."
Correct answer: Whom could they choose but the man who had worked for it all those years?- A. Globular proteins
- B. Glycoproteins
- C. Fibrous proteins
- D. Glycolipids
Explanation: Antibodies are globular proteins that play a key role in the immune system by binding to antigens.
Correct answer: Globular proteins- A. Molecules of dissolved substance move from left to right
- B. Molecules of dissolved substance move from right to left
- C. Overall, water molecules move from left to right.
- D. Overall, water molecules move from right to left
Explanation: Water molecules move from the left to right as water potential is higher on the left side than the right side.
Correct answer: Overall, water molecules move from left to right.- A. Right Atrium
- B. Left Atrium
- C. Right Ventricle
- D. Left Ventricle
- E. Aorta
Explanation: The right atrium is the part of the heart that receives deoxygenated blood from the whole body via the superior and inferior vena cava.
Correct answer: Right Atrium- A. A
- B. B
- C. C
- D. Both A and B
- E. Both C and D
Explanation: Option B is the isotonic solution, and option C is the hypotonic solution as it causes the cells to fill with water due to the movement of…
Correct answer: A- A. Liver
- B. Intestine
- C. Liver and Intestine
- D. Adipose tissue
Explanation: a) Liver: High-Density Lipoprotein (HDL) is synthesized in the liver. HDL is a type of lipoprotein that plays a crucial role in the…
Correct answer: Liver- A. Both the atria are towards the left side
- B. Both the ventricles are towards the left side
- C. Entire heart is on the left side
- D. The aorta is on the left side
Explanation: Option B: This option is the correct answer. It states that the beating of the heart is heard on the left side because both the ventricles…
Correct answer: Both the ventricles are towards the left side- A. Ascent of sap
- B. Plasmolysis
- C. Imbibition
- D. Guttation
Explanation: A hydathode is a type of pore, commonly found in angiosperms, that secretes water through pores in the epidermis of leaf margin through…
Correct answer: Guttation- A. Over extension
- B. Abrasion
- C. Physical trauma
- D. Contraction
Explanation: Pericardium prevents the heart from over extension; Pericardial fluid prevents the heart from abrasion and ribcage prevents it from…
Correct answer: Over extension- A. Cellulose
- B. Lignin
- C. Pectin
- D. Glucose
Explanation: Answer is "Glucose"Explanation: Glucose is soluble in water because it is a monosaccharide in nature.
Correct answer: Glucose- A. Secondary cell wall
- B. Middle lamella
- C. Cell membrane
- D. Primary cell wall
Explanation: The primary cell wall of the plant is composed of cellulose, pectic compounds mostly polysaccharides, and hemicellulose. It lacks lignin.
Correct answer: Primary cell wall- A. MC complex
- B. lmmunogen
- C. Mucus
- D. Antibodies
Explanation: An antigen is a foreign substance that can stimulate the production of antibodies by the immune system.
Correct answer: Antibodies- A. Plasmodcsmala
- B. Cortex
- C. Endodennis
- D. Pith
Explanation: In roots, the apoplast pathway of water is disrupted when water reaches the endodermis.
Correct answer: Endodennis- A. Erythrocytes
- B. Leukocytes
- C. Neutrophils
- D. Thrombocytes
Explanation: Thrombocytes are called blood platelets.They are minute discshaped cell fragments in mammalian blood.
Correct answer: Thrombocytes- A. Capillaries
- B. Arteries
- C. Veins
- D. Lymph vessels
Explanation: Yes, the fastest distribution of an injectable material or medicine is achieved by injecting it into the veins.
Correct answer: Veins- A. Atrioventricular bundle
- B. Purkinje system
- C. Sinoatrial node
- D. Atrioventricular node
Explanation: SA (sinoatrial) node is a specialized bundle of neurons located in the upper part of the right atrium of the heart.
Correct answer: Sinoatrial node- A. Diffusion
- B. Active transport
- C. Osmosis
- D. Facilitated diffusion
Explanation: Answer is "Osmosis"The movement of water molecules from a region of higher water potential to a region of lower water potential through…
Correct answer: Osmosis- A. Root hairs
- B. Root cells
- C. Underground stem
- D. Leaves
Explanation: Root hairs are specialized structures that extend from the surface of root cells and greatly increase the surface area for water and…
Correct answer: Root hairs- A. Cisternae
- B. Tonoplast
- C. Cristae
- D. Protoplast
Explanation: The membrane that surrounds the vacuole in plant cells is called the tonoplast.
Correct answer: Tonoplast- A. Leukemia
- B. Edema
- C. Thalassemia
- D. Atherosclerosis
Explanation: "Leukaemia" is a type of cancer that results in the body making too many abnormal white blood cells.
Correct answer: Leukemia