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9th Class Biology Chapter 9 MCQs with Answers

9th Class Biology Chapter 9 MCQs

Understand the process of the movement of material in living organisms through “Transport MCQs” for 9th-class biology. Transportation in plants and animals would be learnt through xylem and phloem with the circulatory system. Prepare yourself by practicing well-structured MCQs based on standard concepts for easy understanding.

The circulatory system is responsible for the transport of:
a) Nutrients
b) Oxygen
c) Waste products
d) All of the above

Answer
d) All of the above

The liquid component of blood is called:
a) Plasma
b) Serum
c) Lymph
d) Hemoglobin

Answer
a) Plasma

Red blood cells are primarily responsible for:
a) Carrying oxygen
b) Fighting infections
c) Clotting blood
d) Producing hormones

Answer
a) Carrying oxygen

The main function of white blood cells is to:
a) Carry oxygen
b) Fight infections
c) Transport nutrients
d) Aid in blood clotting

Answer
b) Fight infections

Blood vessels that carry blood away from the heart are called:
a) Arteries
b) Veins
c) Capillaries
d) Venules

Answer
a) Arteries

The largest artery in the human body is the:
a) Aorta
b) Pulmonary artery
c) Carotid artery
d) Femoral artery

Answer
a) Aorta

Blood is returned to the heart from the body by the:
a) Pulmonary veins
b) Vena cava
c) Coronary veins
d) Renal veins

Answer
b) Vena cava

The smallest blood vessels in the body are called:
a) Arteries
b) Veins
c) Capillaries
d) Venules

Answer
c) Capillaries

Which of the following is NOT a component of the lymphatic system?
a) Lymph nodes
b) Lymphatic vessels
c) Heart
d) Spleen

Answer
c) Heart

The lymphatic system plays a role in:
a) Carrying oxygen
b) Regulating body temperature
c) Immune response
d) Transporting hormones

Answer
c) Immune response

The process by which substances move from an area of higher concentration to an area of lower concentration is called:
a) Active transport
b) Osmosis
c) Diffusion
d) Filtration

Answer
c) Diffusion

Which of the following is a waste product transported by the circulatory system?
a) Oxygen
b) Carbon dioxide
c) Glucose
d) Water

Answer
b) Carbon dioxide

The process by which water and dissolved substances are forced through a membrane due to hydrostatic pressure is called:
a) Osmosis
b) Filtration
c) Active transport
d) Diffusion

Answer
b) Filtration

In the lungs, oxygen moves from the alveoli into the blood through:
a) Diffusion
b) Osmosis
c) Active transport
d) Filtration

Answer
a) Diffusion

The heart chamber that receives oxygenated blood from the lungs is the:
a) Right atrium
b) Left atrium
c) Right ventricle
d) Left ventricle

Answer
b) Left atrium

Which blood vessel carries oxygenated blood from the lungs to the heart?
a) Pulmonary artery
b) Pulmonary vein
c) Aorta
d) Vena cava

Answer
b) Pulmonary vein

The process by which cells take in substances from the extracellular fluid by engulfing them is called:
a) Exocytosis
b) Endocytosis
c) Osmosis
d) Diffusion

Answer
b) Endocytosis

Blood is pumped out of the heart to the rest of the body by the:
a) Left atrium
b) Right atrium
c) Left ventricle
d) Right ventricle

Answer
c) Left ventricle

The exchange of gases (oxygen and carbon dioxide) between the blood and body tissues occurs in the:
a) Lungs
b) Heart
c) Kidneys
d) Capillaries

Answer
d) Capillaries

The heart valve that separates the left atrium from the left ventricle is the:
a) Tricuspid valve
b) Pulmonary valve
c) Aortic valve
d) Mitral valve

Answer
d) Mitral valve

Blood is pumped out of the heart to the lungs by the:
a) Left atrium
b) Right atrium
c) Left ventricle
d) Right ventricle

Answer
d) Right ventricle

The process by which substances move across a cell membrane with the help of carrier proteins is called:
a) Osmosis
b) Facilitated diffusion
c) Active transport
d) Filtration

Answer
b) Facilitated diffusion

The heart valve that separates the right atrium from the right ventricle is the:
a) Tricuspid valve
b) Pulmonary valve
c) Aortic valve
d) Mitral valve

Answer
a) Tricuspid valve

Which of the following is a function of the respiratory system?
a) Transporting nutrients
b) Regulating body temperature
c) Exchanging gases (oxygen and carbon dioxide)
d) Filtration of blood

Answer
c) Exchanging gases (oxygen and carbon dioxide)

The primary function of the left ventricle is to:
a) Pump oxygenated blood to the lungs
b) Pump deoxygenated blood to the body
c) Pump oxygenated blood to the body
d) Pump deoxygenated blood to the lungs

Answer
c) Pump oxygenated blood to the body

The process by which red blood cells are produced is called:
a) Osmosis
b) Hemostasis
c) Hemolysis
d) Erythropoiesis

Answer
d) Erythropoiesis

Blood flows through the circulatory system in a specific direction due to the action of:
a) Semilunar valves
b) Atrioventricular valves
c) Ventricles
d) The pumping action of the heart

Answer
b) Atrioventricular valves

The part of the brain that controls heart rate, blood pressure, and breathing is the:
a) Cerebellum
b) Cerebrum
c) Medulla oblongata
d) Hypothalamus

Answer
c) Medulla oblongata

The movement of substances against the concentration gradient, requiring energy, is known as:
a) Osmosis
b) Facilitated diffusion
c) Active transport
d) Filtration

Answer
c) Active transport

Blood from the digestive organs is transported to the liver through the:
a) Renal vein
b) Hepatic portal vein
c) Pulmonary vein
d) Femoral vein

Answer
b) Hepatic portal vein

The process by which blood vessels narrow to reduce blood flow is known as:
a) Vasodilation
b) Vasoconstriction
c) Venous return
d) Filtration

Answer
b) Vasoconstriction

The cardiovascular system consists of the heart, blood vessels, and:
a) Lungs
b) Kidneys
c) Liver
d) Blood

Answer
d) Blood

Blood returning from the head and upper body is delivered to the heart through the:
a) Pulmonary veins
b) Vena cava
c) Coronary veins
d) Renal veins

Answer
b) Vena cava

The two major types of white blood cells are:
a) Neutrophils and basophils
b) Eosinophils and monocytes
c) Lymphocytes and monocytes
d) Neutrophils and lymphocytes

Answer
d) Neutrophils and lymphocytes

The part of the brain that controls body temperature, hunger, and thirst is the:
a) Cerebellum
b) Cerebrum
c) Medulla oblongata
d) Hypothalamus

Answer
d) Hypothalamus

The contraction phase of the heart is called:
a) Diastole
b) Systole
c) Cardiac cycle
d) Fibrillation

Answer
b) Systole

The relaxation phase of the heart is called:
a) Diastole
b) Systole
c) Cardiac cycle
d) Fibrillation

The hepatic portal system allows nutrients absorbed by the intestines to be transported directly to the:
a) Heart
b) Brain
c) Liver
d) Lungs

Answer
c) Liver

The medical term for low blood pressure is:
a) Hypertension
b) Hypotension
c) Bradycardia
d) Tachycardia

Answer
b) Hypotension

The medical term for high blood pressure is:
a) Hypertension
b) Hypotension
c) Bradycardia
d) Tachycardia

Answer
a) Hypertension

The hepatic portal vein carries blood from the digestive organs to the:
a) Brain
b) Heart
c) Liver
d) Lungs

Answer
c) Liver

The contraction of the heart is stimulated and regulated by electrical signals produced by the:
a) Aorta
b) Vena cava
c) Sinoatrial node
d) Atrioventricular node

Answer
c) Sinoatrial node

The medical term for an abnormally fast heart rate is:
a) Hypertension
b) Hypotension
c) Bradycardia
d) Tachycardia

Answer
d) Tachycardia

Which of the following is NOT a function of the lymphatic system?
a) Transporting nutrients
b) Filtering harmful substances
c) Immune response
d) Absorption of fats

Answer
a) Transporting nutrients

Blood flows from the right ventricle to the:
a) Pulmonary artery
b) Pulmonary vein
c) Aorta
d) Vena cava

Answer
a) Pulmonary artery

The largest vein in the human body is the:
a) Aorta
b) Pulmonary artery
c) Vena cava
d) Femoral vein

Answer
c) Vena cava

The part of the brain that controls coordination and balance is the:
a) Cerebellum
b) Cerebrum
c) Medulla oblongata
d) Hypothalamus

Answer
a) Cerebellum

Blood from the heart is transported to the lungs through the:
a) Left atrium
b) Right atrium
c) Left ventricle
d) Right ventricle

Answer
d) Right ventricle

The lymphatic system plays a crucial role in the body’s:
a) Immune response
b) Oxygen transport
c) Regulation of body temperature
d) Synthesis of hormones

Answer
a) Immune response

Blood is pumped out of the heart to the lungs by the:
a) Left atrium
b) Right atrium
c) Left ventricle
d) Right ventricle

Answer
d) Right ventricle

The process by which blood vessels expand to increase blood flow is known as:
a) Vasodilation
b) Vasoconstriction
c) Venous return
d) Filtration

Answer
a) Vasodilation

Blood from the lower body is delivered to the heart through the:
a) Pulmonary veins
b) Vena cava
c) Coronary veins
d) Renal veins

Answer
b) Vena cava

The heart valve that separates the left atrium from the left ventricle is the:
a) Tricuspid valve
b) Pulmonary valve
c) Aortic valve
d) Mitral valve

Answer
d) Mitral valve

Which of the following is a function of the respiratory system?
a) Transporting nutrients
b) Regulating body temperature
c) Exchanging gases (oxygen and carbon dioxide)
d) Filtration of blood

Answer
c) Exchanging gases (oxygen and carbon dioxide)

The primary function of the left ventricle is to:
a) Pump oxygenated blood to the lungs
b) Pump deoxygenated blood to the body
c) Pump oxygenated blood to the body
d) Pump deoxygenated blood to the lungs

Answer
c) Pump oxygenated blood to the body

The process by which red blood cells are produced is called:
a) Osmosis
b) Hemostasis
c) Hemolysis
d) Erythropoiesis

Answer
d) Erythropoiesis

Blood flows through the circulatory system in a specific direction due to the action of:
a) Semilunar valves
b) Atrioventricular valves
c) Ventricles
d) The pumping action of the heart

Answer
b) Atrioventricular valves

The part of the brain that controls heart rate, blood pressure, and breathing is the:
a) Cerebellum
b) Cerebrum
c) Medulla oblongata
d) Hypothalamus

Answer
c) Medulla oblongata

The movement of substances against the concentration gradient, requiring energy, is known as:
a) Osmosis
b) Facilitated diffusion
c) Active transport
d) Filtration

Answer
c) Active transport

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