MCQs For NCERT Class 10 Science Chapter 7 Control and Coordination

Please refer to the MCQ Questions for Class 10 Science Chapter 7 Control and Coordination with Answers. The following Control and Coordination Class 10 Science MCQ Questions have been designed based on the current academic year syllabus and examination guidelines for Class 10. Our faculty has designed MCQ Questions for Class 10 Science with Answers for all chapters as per your NCERT Class 10 Science book.

Control and Coordination Class 10 MCQ Questions with Answers

Please see below Control and Coordination Class 10 Science MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Which vein brings clean blood from the lungs into the heart ? 
(a) renal vein
(b) pulmonary vein
(c) vena cava
(d) hepatic vein

Question. Which blood vessel does not carry any carbon dioxide ? 
(a) pulmonary artery
(b) vena cava
(c) hepatic vein
(d) pulmonary vein

Question. It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon ? 
(a) the cold climate stimulates the production of red corpuscles to keep the body warm
(b) people of high mountains breathe more quickly
(c) the low air pressure requires more red corpuscles to supply the body cells with oxygen.
(d) the low air pressure in high mountains speeds up the blood circulation so that more red corpuscles are needed

Question. The phloem tissue in plants is responsible for the transport of :
(a) water
(b) water and minerals
(c) sugar
(d) all of the above

Question. Which of the following has a three-chambered heart ? 
(a) pigeon
(b) lizard
(c) fish
(d) lion

Question. In which of the following are the largest amounts of nitrogen excreted from a mammalian body ?     c
(a) breath
(b) sweat
(c) urine
(d) faeces

Question. Which one of the following has cytoplasm but no nucleus : 
(a) xylem vessel
(b) sieve tube
(c) tracheid
(d) companion cell

Question. What prevents the backflow of blood inside the heart during contraction ? 
(a) thick muscular walls of ventricles
(b) valves
(c) thin walls of atria
(d) all of the above

Question. Which of the following is the correct path taken by urine in our body ? 
(a) kidney → ureter → urethra → bladder
(b) kidney → bladder → urethra → ureter
(c) kidney → ureter → bladder → urethra
(d) bladder → kidney → ureter → urethra

Question. The process of carrying food from the leaves to other parts of a plant is called : 
(a) transpiration
(b) transportation
(c) translocation
(d) transformation

Question. Which of the following is the only conducting tissue in non-flowering plants ? 
(a) xylem vessels
(b) sieve tubes
(c) companion cells
(d) tracheids

Question. Which of the following helps in the upward movement of water and dissolved minerals from the roots to the leaves through the stem ? 
(a) transportation
(b) translocation
(c) tropic movement
(d) transpiration

Question. Coagulation of blood in a cut or wound is brought about by : 
(a) plasma
(b) platelets
(c) WBC
(d) RBC

Question. The blood vessel which carries oxygenated blood from the lungs to the heart is :   
(a) main artery
(b) pulmonary artery
(c) main vein
(d) pulmonary vein

Question. The instrument for measuring blood pressure is called :   
(a) manometer
(b) sphygmomanometer
(c) barometer
(d) potentiometer

Question. The procedure of cleaning the blood of a person by using a kidney machine is known as :
(a) ketolysis
(b) hydrolysis
(c) dialysis
(d) photolysis

Question. In a neuron conversion of electrical signal to a chemical signal occurs at :
(a) Cell body
(b) Dendritic end
(c) Axonal terminals
(d) Axon

Question. The substance that triggers the fall of mature leaves and fruits from plants is due to :
(a) Auxin
(b) Gibberellin
(c) Abscisic acid
(d) Cytokinin

Question. The gap between two neurons is called a :
(a) Dendrite
(b) Synapse
(c) Axon
(d) Impulse

Question. The shape of guard cells changes due to change in the :
(a) Protein composition of cells
(b) Temperature of cells
(c) Amount of water in cells
(d) Position of nucleus in cells

Question. Cretinism results due to :
(a) Excess secretion of growth hormone
(b) Under secretion of thyroxin
(c) Excess secretion of adrenaline
(d) Under secretion of growth hormone

Question. Which of the following is a plant hormone ?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin

Question. The growth of tendrils in pea plants is due to :
(a) Effect of gravity
(b) Effect of chemicals
(c) Rapid cell division in tendrillar cells that are away from the support
(d) Rapid cell division in tendrillar cells in contact with the support

Question. The movement of root away from light is :
(a) Positive phototropism
(b) Negative hydrotropism
(c) Negative phototropism
(d) Positive geotropism

Question. Involuntary actions in the body are controlled by :
(a) Medulla in fore brain
(b) Medulla in mid brain
(c) Medulla in hind brain
(d) Medulla in spinal cord

Question. The brain is responsible for :
(a) Thinking
(b) Regulating the heart beat
(c) Balancing the body
(d) All of the above

Question. The excretory organs in an earthworm are : 
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters

Question. One of the following is not a constituent of blood. This one is :   
(a) red blood cells
(b) white blood cells
(c) sieve plates
(d) platelets

Question. If a patient is put on dialysis, he is most likely suffering from a severe ailment of the :   
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system

Question. The component of blood which makes chemicals known as antibodies is : 
(a) platelets
(b) white blood cells
(c) red blood cells
(d) plasma

Question. The excretory unit in the human excretory system is called : 
(a) nephron
(b) neuron
(c) nephridia
(d) kidneyon

Question. The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is mainly : 
(a) glucose
(b) amino acid
(c) urea
(d) water

Question. An animal in which the oxygenation of blood does not take place in the lungs is : 
(a) cow
(b) fish
(c) frog
(d) fox

Question. Electrical impulse travels in a neuron from –
(a) Dendrite → axon → axon end → cell body.
(b) Cell body→ dendrite→ axon → axon end.
(c) Dendrite→ cell body→ axon→ end.
(d) Axon end → axon→ cell body → dendrite.

Question. Junction of two neurons in called.
(a) Synapse
(b) Synapsis
(c) Joint
(d) Junction

Question. The growth of tendrils in pea plants is due to
(a) Effect of light
(b) Effect of gravity
(c) Rapid cell division in tendrillar cells in contact with the support
(d) Rapid cell divisions in tendrillar cells that are away from the support.

Question. Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin

Question. Which one of the endocrine glands is known as master gland?
(a) Pituitary
(b) Adrenal
(c) Thyroid
(d) Parathyroid

Question ASSERTION (a): Insulin regulates blood sugar level.
REASON(R): insufficient secretion of insulin will cause diabetes.
(a) Both A and R are true and R is the correct explanation for A
(b) Both A and R are true and R is not the correct explanation for A
(c) A is true but R is false
(d) A is false but R is true

Question. ASSERTION (a): a nerve impulse is an electrochemical event.
REASON(R): In a nerve impulse there are changes in the resting potential which spread down the
nerve fiber
(a) Both A and R are true and R is the correct explanation for A
(b) Both A and R are true and R is not the correct explanation for A
(c) A is true but R is false
(d) A is false but R is true

Fill in the blanks

Question. A neuron which carries an impulse to the brain is called a …………………………. neuron.

Question. …………………………. is the hormone that causes phototropism in plants.

Question. The response of leaves to the sunlight is called ………………………….

Assertion and Reasoning Based Questions

Directions : In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as :
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false but reason is true.

Question. Assertion : It is advised to have iodized salt in our diet.
Reason : It prevents us from goitre.
Answer : (a) Iodine is very necessary for the production of the hormone thyroxine, lack of thyroxine causes goitre in the body. So, iodine is necessary to prevent goitre. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : In spite of not having nervous system, plants can sense things.
Reason : Plants can sense things with the help of hormones.
Answer : (a) Plant hormones help them to sense changes in the environment even if they don’t have eyes, ears or nose. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : Cytokinins promote cell division in plants.
Reason : Full form of ABA is abscisic acid.
Answer : (b) Both the statements are true, but full form of ABA has no relation with the function of cytokinin. Thus both assertion and reason are true, but reason is not the correct explanation of the assertion.

Question. Assertion : Synapse is a gap through which nerve impulse pass from one neuron to the next.
Reason : Neuron is the functional unit of nervous system.
Answer : (b) Synapse and neuron has no relation regarding function. Neuron is the functional unit but that doesn’t define synapse. Thus both assertion and reason are true, but reason is not the correct explanation of the assertion.

Question. Assertion : Cerebrum controls the body posture.
Reason : Cerebrum is not connected to internal ear.
Answer : (d) Cerebellum controls body posture and cerebrum is not connected to internal ear. Thus assertion is false but reason is true.

Creating Based Questions

Question. ‘Synapses act like one-way valves’ – Elaborate.
Answer : The chemical substance is present only on one side of the gap, so nerve impulse can go across only from one side ( which contains the chemical substance).

Question. Using the following words below, construct a reflex arc. Sensory nerves, receptor, effector, stimulus, brain or spinal cord, response, motor neurons.
Answer : Stimulus → Receptor → Sensory nerves → Brain or
spinal cord → Motor neurons → Effector → Response.

Question. ‘An alcoholic person usually walks clumsily’— develop a better explanation for this statement.
Answer : Cerebellum is the part of the brain that maintains balance and posture. After consumption of alcohol the cerebellum gets affected by the alcohol for which it cannot maintain balance and posture properly and hence walk clumsily.

Question. Create a flow chart of neuron through which information travels as an electrical impulse by filling up ‘a’ and ‘b’.
Dendrite → a → b → end point of neuron.
Answer : (a) Cell body or cyton (b) Axon

Question. Choose the incorrect word from the following and replace it with the correct word :
(a) Pancreas is called the master gland.
(b) Iron is needed for production of thyroxine.
Answer : (a) Pancreas is the incorrect word replaced by pituitary gland.
(b) Iron is the incorrect word replaced by iodine.

Paragraph/Table and Case Study Based Questions

1. The brain directs our body’s internal functions. It also integrates sensory impulses and information to form perceptions, thoughts, and memories. The brain gives us self-awareness and the ability to speak and move in the world.

(a) The brain is divided into three major subclasses.
Name these subclasses.
(b) Name the part of the brain that is responsible for maintaining body posture ?
(c) Name the part of the brain that has the reflex centers for sneezing and vomiting ?
(d) The brain is the part of the central nervous system or peripheral nervous system ?
Answer : (a) The brain is divided into three main subclasses:
the forebrain, the midbrain, and the hindbrain.
The structure present toward the lower back of the skull is the hindbrain. The narrow region that links the hindbrain with the forebrain is the midbrain.
The structure in front of the brain is the forebrain.
(b) The cerebellum is present in the hindbrain. It controls the body posture and coordinates motor activity for moving limbs. It is densely packed with neurons.
(c) The medulla oblongata is the region which regulates the breathing, heart rate, and blood pressure, and also consists of reflex centers for sneezing, vomiting, defecating, coughing, hiccupping, and swallowing.
(d) The nervous system present in vertebrates is divided into the peripheral nervous system and central nervous system. The brain and spinal cord are found in the central nervous system. Thus, the brain is part of the central nervous system.

2. Study the table given below and answer the questions.

(a) Name the part of the brain where the cerebrum is located ?
(b) The cerebellum is located in the ____________ .
(c) What is the main thinking part of the brain ?
(d) Name the nerves that arise from the spinal cord.
Answer : (a) The forebrain of the brain contains an area known as the cerebrum. This area is composed of the cerebral cortex.
(b) The cerebellum is located in the hindbrain. The structure present toward the lower back of the skull is the hindbrain.
(c) The major part of the brain that is involved in thinking is the forebrain.
(d) The nerves that arise from the spinal cord are called spinal nerves.

3. A system of control and coordination is essential in living organism to maintain homeostasis as well as to respond to various stimuli. The working together of various organs in an organism, to produce a proper response to a stimulus is called coordination. In animals, control and coordination is done by the nervous system and endocrine system. 
Hormones in animals conduct a variety of functions like growth, sexual development, vegetative development, cellular respiration, metabolism, thermal production etc. While the nervous system coordinates activities of animals like movement,
hormones integrate the coordination. Larger complex animals like vertebrates have endocrine glands to produce hormones.

(i) Which of the following statement is incorrect regarding Thyroid gland?
(a) Present in the neck region.
(b) Produces thyroxin.
(c) Responsible for metabolic rate, healthy hair & skin.
(d) Regulates blood sugar level.

(ii) Which endocrine gland controls Development of female sex organs, regulates menstrual cycle, etc?
(a) Pituitary
(b) Thyroid
(c) Ovaries
(d) Pancreas

(iii) Deficiency of which hormone leads to dwarfism
(a) Adrenaline
(b) Thyroxin
(c) Growth Hormone
(d) Somatostatin

(iv) _________ is a hormone produced by the beta cells of the pancreas
(a) Insulin
(b) Glucagon
(c) Glycogen
(d) Oxytocin

(v) Growth hormone is secreted by:
(a) Pituitary gland
(b) Thyroid gland
(c) Pancreas
(d) Testes

4. Plants do not show the type of movements that animals exhibit. Plants are anchored to a place, remain stationary and perform their duties. However, plants also show certain movements of their body or body parts in response to changes in the environment. Most of these movements are hard to see. The movements that plants exhibit come under two categories viz Growth movements and Turgour movements.

(i) The movement of a plant part in response to the force of attraction exerted by the earth is called:
(a) Hydrotropism
(b) Geotropism
(c) Chemotropism
(d) Phototropism

(ii) The main function of the plant hormone called Abscisic acid is to:
(a) Increase the length of cells
(b) Promote cell division
(c) Inhibit growth
(d) Promote growth of stem and roots

(iii) The growth of tendrils in pea plants is due to the:
(a) Effect of sunlight on the tendril cells facing the sun
(b) Effect of gravity on the part of tendril hanging down towards the earth
(c) Rapid cell division and elongation in tendril cells that are away from the support
(d) Rapid cell division and elongation in tendril cells in contact with the support

(iv) Twining of tendrils around a support is a good example of:
(a) Chemotropism
(b) Nastic movements
(c) Phototropism
(d) Thigmotropism

(v) A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of:
(a) Chemotropism
(b) Hydrotropism
(c) Phototropism
(d) Geotropism