CBSE Class 10 Biology Control And Coordination Worksheet Set C

Read and download free pdf of CBSE Class 10 Biology Control And Coordination Worksheet Set C. Students and teachers of Class 10 Science can get free printable Worksheets for Class 10 Science Chapter 7 Control and Coordination in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 10 students should practice questions and answers given here for Science in Class 10 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 10 Science Worksheets prepared by teachers as per the latest Science books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 10 Science Chapter 7 Control and Coordination

Class 10 Science students should refer to the following printable worksheet in Pdf for Chapter 7 Control and Coordination in Class 10. This test paper with questions and answers for Class 10 will be very useful for exams and help you to score good marks

Class 10 Science Worksheet for Chapter 7 Control and Coordination

Question : Intercellular communication in multicellular organisms occur through
(A) digestive system only
(B) nervous system only
(C) both nervous and endocrine system
(D) respiratory system only
Answer : C

Question : Which one is not secreted by pituitary ?
(A) Thyroxine
(B) FSH
(C) GH
(D) ACTH
Answer : A

Question : What will happen, if the thyroid is removed from a tadpole ?
(A) The tadpole will grow into a dwarf frog
(B) The larva will produce giant frog
(C) It will continue indefinitely in larva stage
(D) The larva will die
Answer : C

Question : Tick the right statement -
(A) Spinal cord is a part of central nervous system.
(B) Nerves are continuous fibres
(C) Reflexes are not controlled by nerves
(D) None of the above
Answer : A

Question : Temperature in human beings is controlled by
(A) hypothalamus gland
(B) thyroid gland
(C) pituitary gland
(D) adrenal gland
Answer : A

Question : Chemically hormones are
(A) biogenetic amines only
(B) proteins, steroids and biogenetic amines
(C) proteins only
(D) steroids only
Answer : B

Question : Hormones influence body parts for bringing about
(A) proper growth
(B) co – ordination
(C) stimulation of body parts
(D) proper functioning of body parts
Answer : B

Question : Leuteinising hormone in female
(A) helps in the appearance of secondary sexual characters
(B) stimulates ovary to secrete esterogen
(C) helps in release of the ovum from the ovary
(D) control of blood pressure
Answer : C

Question : Hormone concerned primarily with cell division is
(A) GA3
(B) IAA
(C) NAA
(D) Cytokinins
Answer : D

Question : The brain is responsible for:
(a) thinking.
(b) regulating the heart beat.
(c) balancing the body.
(d) all of the above. 
Answer : D

Question : In reflex action the reflex arc is formed by
(A) brain → spinal cord → muscles
(B) receptor → spinal cord → muscles
(C) muscle → receptor → brain
(D) muscles → spinal cord → receptor
Answer : B

Question : The sensation of sight in human brain is perceived by
(A) optic lobe
(B) occipital lobe
(C) frontal lobe
(D) parietal lobes
Answer : A

Question : Which part of the brain act as Relay centre?
(A) hypothalamus
(B) cerebrum
(C) cerebellum
(D) thalamus
Answer : D

Question : Which part of brain is more developed in man ?
(A) Medulla
(B) Cerebellum
(C) Cerebrum
(D) Optic lobes
Answer : C

Question : Part of brain involved in muscular movement .
(A) Mid brain
(B) cerebrum
(C) sensory area
(D) cerebellum
Answer : B

Question : Autonomic nervous system controls
(A) reflex action
(B) sense organs
(C) internal organs
(D) skeletal muscle
Answer : C

Question : Which cell organelle is absent in neuron ?
(A) mitochondria
(B) ribosomes
(C) centrioles
(D) nucleus
Answer : C

Question : Which part of the brain is affected first in a drunk person ?
(A) Cerebrum
(B) Medulla oblongata
(C) Cerebellum
(D) Olfactory lobe
Answer : C

Question : Reflex action in a body is not
(A) inborn
(B) automatic & quick
(C) voluntary
(D) protective in nature
Answer : C

Question : The centre for the sense of smell in brain is -
(A) cerebellum
(B) cerebrum
(C) midbrain
(D) olfactory lobes
Answer : D

Question : The study of nervous system and its disorders is called
(A) neurogenesis
(B) hematology
(C) neuroglia
(D) neurology 
Answer : D

Question : The gap between two neurons is called a
(a) dendrite.
(b) synapse.
(c) axon.
(d) impulse.
Answer : B

Question : Myelin sheath is a covering of
(A) muscle cell
(B) axon
(C) blood vessels
(D) osteocyte
Answer : B

Question : Two halves of the cerebrum are connected through
(A) cerebral hemispheres
(B) medulla oblongata
(C) corpus callosum
(D) pons varolii
Answer : C

Question : Synapse is a close proximity of -
(A) two veins
(B) two arteries
(C) two lymphatics
(D) two neurons.
Answer : D

Question : The largest part of brain is
(A) Corpora quadrigemia
(B) Medulla oblongata
(C) Cerebellum
(D) Cerebrum
Answer : D

Question : Cerebral hemisphere are the centres for
(A) thinking
(B) taste
(C) smell
(D) all the above
Answer : D

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

Very Short Answer type Questions

Question : What is the difference between a reflex action and walking?
Answer : A reflex action is voluntary action which is a rapid and automatic response to stimuli while walking is a voluntary action which requires our thinking and in our control.

Question : What are plant hormones?
Answer : Plant hormones are the fluids which are secreted within the plant, also known as phytohormones. Plant hormones regulate the growth and development of the plant. Examples of plant hormones are auxins, gibberellins, cytokinins, Abscisic acid and ethylene.

Question : Why are some patients of diabetes treated by giving injections of insulin?
Answer :Diabetes is caused due to less or no secretion of hormone insulin by pancreas. In such a person, blood sugar level is high. Insulin converts extra sugar present in blood into glycogen. Thus, patients suffering from diabetes are given insulin injection to control their blood sugar level.

Question : How do we detect the smell of an agarbatti (incense stick)?
Answer : When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detect it and send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.

Question : What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?
Answer- Functions of receptors:
(1) They sense the external stimuli such as heat or pain.
(2) They also trigger an impulse in the sensory neuron which sends message to the spinal cord.
When the receptors are damaged, the external stimuli transferring signals to the brain are not felt. For example, in the case of damaged receptors, if we accidentally touch any hot object, then our hands might get burnt as damaged receptors cannot perceive the external stimuli of heat and pain.

Question : What is the role of the brain in reflex action?
Answer : Brain has no direct involvement in reflex action. It is mainly controlled by Spinal Cord as this action not requires thinking and is very quick action.

Question : Which part of the brain maintains posture and equilibrium of the body?
Answer : Cerebellum

Question : How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
Answer : The movements of the leaves of the sensitive plant are touch sensitive and independent of growth, while the movement of the shoot towards light is growth related and known as phototropism.

Question : Give an example of a plant hormone that promotes growth.
Answer : Auxins.

Question : What happens at the synapse between two neurons?
Answer : A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.

Question : How do auxins promote the growth of a tendril around a support?
Answer : When tendrils come in contact with any support, the part of the tendril in contact with the object does not grow as rapidly as the part of the tendril away from the object. This is caused by the action of auxin hormone. Less auxin occurs on the side of contact as compared to the free side as a result, auxin promotes growth on the free side and the tendrils coil around the support.

Question : How does chemical coordination take place in animals?
Answer : Chemical coordination takes place in animals with the help of hormones. Hormones are the chemical fluids that are secreted by the glands of the endocrine system. Hormones travel through the blood and regulate the overall growth and development of the animals.

Question : Why is the use of iodized salt advisable?
Answer : Because iodine stimulates the thyroid gland to produce thyroxin hormone. It regulates carbohydrate, fat, and protein metabolism in our body. Deficiency of this hormone results in the enlargement of the thyroid gland. This can lead to goitre, a disease characterized by swollen neck.

Question : How does our body respond when adrenaline is secreted into the blood?
Answer : When someone is in danger or in emergency then adrenal gland secrete adrenaline hormone. It is secreted directly into the blood and is transported to different parts of the body. It speeds up the heartbeat and hence supplies more oxygen to the muscles. This results in increasing breathing rate and blood pressure which enable them to fight with such urgent situation.

Question : Draw the structure of a neuron and explain its function.
Answer-

8th.sci.eng.oct.nov.21.22 15

Neurons is the fundamental unit of nervous system. Neuron consists of main three parts : Axon, Dendrite and Cell body.
(1) Axon: It conducts messages away from the cell body.
(2) Dendrite: It receives information from axon of another cell and conducts the messages towards the cell body.
(3) Cell body: It contains nucleus, mitochondria, and other organelles. It is mainly concerned with the maintenance and growth.
 
Question : How does phototropism occur in plants?
Answer- The growth movement in plants in response to light stimulus due to auxin plant hormone is known as phototropism. The shoots show positive phototropism and the roots show negative phototropism. This means that the shoots bend towards the source of light whereas the roots bend away from the light source.
 
Question : Which signals will get disrupted in case of a spinal cord injury?
Answer- In case of the spinal cord injury, the signals coming from the nerves as well as the signals coming to
the receptors will be disrupted.
 
Question : How does chemical coordination occur in plants?
Answer- Chemical coordination occurs in plants with the help of plant hormones. Different plant hormones help to coordinate growth, development, and responses to the environment. For example, auxin promotes cell growth, gibberellins promote stem growth, cytokinins promote cell division and abscisic acid inhibits growth and its effects include wilting of leaves.
 
Question : What is the need for a system of control and coordination in an organism?
Answer- There are various organs in an organism. These organs must be carefully controlled and coordinated for the survival of an organism. All daily decisions that include voluntary and involuntary actions are controlled by central nervous system (CNS).
 
Question : How are involuntary actions and reflex actions different from each other?
Answer- Involuntary action is the set of muscle movement which do not require thinking. But it is controlled by brain for example heart beat. While on the other hand, the reflex action is rapid and spontaneous action in response to any stimulus. For example closing of eyes immediately, when bright light is focused.

 

More Question

Question : What happens if a young green plant receives sunlight from one direction only?

Question : Which plant hormone’s function is opposite to auxins, gibberellins and cytokinins?

Question : What are endocrine glands?

Question : Which plant hormone helps in ripening of fruits and flowering in plants?

Question : What is reflex action?

Question : What are the components of the CNS (Central Nervous System)?

Question : What are spinal and cranial nerves?

Question : Name the hormone secreted by:

1. Ovary

2. Pancreas

3. Pituitary Gland

Question : Name the gaseous phytohormone.

Question : Write an example of nastic movement in plants.

Question : Activities like coughing, sneezing and swallowing are regulated by which part of the brain?

Question : Which gland secretes adrenaline?

Question : What is function of olfactory lobes?

Question : Give example of chemotropism and hydrotropism.

 

Short Answer Type I 

Question : How do endocrine glands help in maintaining feedback control?

Question : How does a touch-me-not plant respond on touching? What is this movement called?

Question : Name the components of Human Nervous System?

Question : Where is Cerebro Spinal Fluid (CSF) present? What is its function?

Question : Represent schematically the path of a reflex arc.

Question : Why endocrine glands are called ductless glands? How do they send hormones to the target organs?

Question : Name the plant hormones responsible for the following:

1. Elongation of cells

2. Promotion of cell division

3. Ripening of fruits

4. Growth of the tip stem

Answer the following:

I. Dwarfism results due to deficiency of which hormone?

II. Blood sugar level rises due to deficiency of which hormone?

III. Which gland secretes digestive enzymes as well as hormones?

IV. Which endocrine gland is present in males but not in females?

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Worksheet for Science CBSE Class 10 Chapter 7 Control and Coordination

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Chapter 7 Control and Coordination CBSE Class 10 Science Worksheet

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