KSEEB Solutions for Class 10 Science Chapter 7 Control and Coordination

Students can Download Science Chapter 7 Control and Coordination Questions and Answers, Notes Pdf, KSEEB Solutions for Class 10 Science helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.

Karnataka State Syllabus Class 10 Science Chapter 7 Control and Coordination

KSEEB Class 10 Science Control and Coordination Intext Questions and Answers

Question 1.
What is the difference between a reflex action and walking?
Answer:
Walking is a voluntary activity but reflexaction is involuntary activity.

Question 2.
What happens at the synapse between two neurons?
Answer:
Sinapse finally allows delivery of impulses from neurons to other cells, such as muscle cells or gland.

Question 3.
Which part of the brain maintains posture and equilibrium of the body?
Answer:
A part of the hindbrain called the cerebellum maintains posture and equilibrium of the body.

Question 4.
How do we detect the smell of an agarbatti (incense stick)?
Answer:
Olfactory receptors in the nose detect the smell of an agarbatti. (incense stick).

Question 5.
What is the role of the brain in reflex action?
Answer:
Spinal cord controls reflex action. Only reflex actions such as cerebral reflexes which requires thinking, involves brain.

Question 6.
What are plant hormones?
Answer:
Plant hormones are simple organic substances which regulate growth and physiological functions in the plant body.

Question 7.
How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
Answer:
In sensitive plant movement of leaves takes place by movement dependent on growth whereas movement of a short towards light takes place by movement independent of growth.

Question 8.
Given an example of a plants hormone that promotes growth.
Answer:
Gibberellins.

Question 9.
How do auxins promote the growth of a tendrill around a support?
Answer:
Tendrils are sensitive to touch. When they come in contact with any support, auxin diffuses from the tip of tendril to the side of tendril that is not in contact with the support. This leads to rapid growth in the part of the tendril away from the support. This causes the tendril to circle around the object and thus cling to it.

Question 10.
Design an experiment to demonstrate hydrotropism.
Answer:
Fill the flower pot with soil and pour water in it. Then plant some seeds. After few days we observe germination of seed and seeds contain two parts one of the parts (root) grows towards water and another part of the plant (stem) grows towards light. By this experiment we conclude that roots show hydrotropism and shoot shows phototropic movement.

Question 11.
How does chemical coordination take place in animals?
Answer:
Hormones are the chemical substances secreted by endocrine glands, Blood transports hormones to distantly located target organs. Binding of hormones to the tissues of target organs delivers the needed information to bring about the effect.

Question 12.
Why is the use of iodised salt advisable?
Answer:
Iodine is necessary for thyroid gland to make thyroxine hormone. Deficiency of iodine in our diet results in the disease Goitre. Hence the use of iodised salt is advisable.

Question 13.
How does our body respond when adrenaline is secreted into the blood?
Answer:
When adrenaline is secreted into blood, the heart beats faster, resulting in supply of more oxygen to our muscles. The breathing rate also increases. Finally, the body is prepared to face emergency situations.

Question 14.
Why are some patients of diabetes treated by giving injections of insulin?
Answer:
The sugar level in the blood rises causing many harmful effects in the patients suffering from diabetes. Insulin is the hormone that helps to bring down the blood sugar levels. Hence the diabetic patients are treated by giving injections of insulin.

Question 15.
Swollen neck is one of the symptoms of
a) Goitre
b) Diabetes
c) Dwarfism
d) Common cold.
Answer:
a) Goitre

Question 16.
Insulin is secreted by
a) Thyroid gland
b) Pancreas
c) Liver
d) Hypothalamus.
Answer:
b) Pancreas

Question 17.
What are the limitations of nervous co-ordination?
Answer:

• Impulses do not reach each and every cell in the animal body. Cells connected to nervous tissue receive impulses.
• The nerve cells cannot continually create and transmit electrical impulses.

Question 18.
Give an example for a hormone secreted by the pituitary? How does it affect us?
Answer:
An example for a hormone secreted by the pituitary is growth hormone. It regulates growth and development of the body. The deficiency of this hormone in childhood leads to dwarfism, whereas its hyper secretion leads to extremely tall condition (Gigantism).

Question 19.
Name the hormones that lead to appearance of secondary sexual characters at puberty.
Answer:
The changes associated with puberty are because of the secretion of testosterone in males and oestrogen in females.

Question 20.
Adrenal gland is associated with
(a) Pharynx
(b) Kidney
(c) Pancreas
(d) Brain
Answer:
(b) Kidney

Question 21.
Name the harmone produces by Thyroid gland and write its functions.
Answer:
Thyroid gland secretes Thyroxin. It regulates fat, carbohydrate and protein metabolism in the body so as to provide the best balance for growth.

Question 22.
Which gland in human secretes both enzymes and hormones?
Answer:
Pancreas.

KSEEB Class 10 Science Control and Coordination Textbook Exercise Questions and Answers

Question 1.
Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin.
Answer:
(d) Cytokinin.

Question 2.
The gap between two neurons is called a
(a) dendrite
(b) synapse.
(c) axon
(d) impulse
Answer:
(b) synapse.

Question 3.
The brain is responsible for
(a) thinking
(b) regulating the heart beat.
(c) balancing the body
(d) All of the above.
Answer:
(d) All of the above.

Question 4.
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:
Receptors are the specialised cells located in our sense organs. They detect information from the environment and send it to brain. During common cold our olfactory receptors do not function properly and the person wont be able to detect smell. When receptors do not’work properly the stimuli are unable to create nerve impulses and body does not respond.

Question 5.
Draw the structure of a neuron and explain its function.
Answer:

Neurons are the functional units of neural system that transmit signals in the form of electrical impulses throughout the body. Dendrites are short protections of neurons that receive signals and conduct them toward the cell body. Axons are long extensions of neurons that conduct impulses away from the cell body to other cells via

Question 6.
How does phototropism occur in plants?
Answer:
Environmental triggers, such as light or gravity will change the directions that plant parts grow in. These directional or tropic, movements can be either towards the stimulus or away from it. So in two different kinds of phototropic movement, shoots respond by bending towards light while roots respond by bending away from it.

Question 7.
Which signals will get disrupted in case of a spinal cord injury?
Answer:
Spinal cord is a component of reflex arc. Hence in case of a spinal cord injury reflex actions will get disrupted.

Question 8.
How does chemical coordination occur in plants?
Answer:
Different plant hormones help to coordinate growth, development and responses to the environment. They are synthesised at places away from where they act and simply diffuse to the area of action.

Question 9.
What is the need for a system of control and coordination in an organism?
Answer:
The process through which two or more organs interact and complement the function of each other is called coordination. In multi cellular organisms with complex organ systems, various physiological processes and life activities involves active participation of different organs. In such organisms the mechanism of control and coordination is necessary.

Question 10.
How are involuntary actions and reflex actions different from each other?
Answer:
Involuntary actions are controlled by the mid – brain and hind brain whereas reflex actions are controlled by spinal cord.

Question 11.
Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
Answer:
Nervous System:
Nervous system is the second way to communicate with the muscles. The communication between the central nervous system and the other parts of the body is facilitated by the peripheral nervous system consisting of cranial nerves arising from the spinal cord.

The forebrain is the main thinking part of the brain. It has regions which receive sensory impulses from various receptors. The brain has three major parts, namely the fore brain, mid brain and hind brain. Midbrain and Hindbrain control involuntary activities. Cerebellum controls voluntary activities.

Hormones:
Hormones are part of the endocrine system which constitutes a second way of control and coordination in our body. Hormones produced in one part of an organism move to another part to achieve the desired effect.

Including animals and human being Adrenaline is secreted directly into the blood and carried to different parts of the body. The target organs or the specific tissues on which it acts include the heart.

Question 12.
What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?
Answer:
Movement in touch me not plant: This movement is Response to stimulus movement of our legs.
The movement of our legs is under our will. Hence this is a voluntary action.

Match the following:

A	B
1. Regulation of blood sugar level	a) Thyroxine
2. Regulation of menstrual cycle	b) Testosterone
3. Regulation of metabolism for body growth	c) Adrenaline
4. Regulation of body functions during emotional imbalance	d) Parathormone
	e) Insulin
	f) estrogen
	g) Growth hormone

Answer:
e) Insulin
f) estrogen
a) Thyroxine
c) Adrenaline

Multiple Choice Question 

Question 1.
The part of the human body in which ovum gets fertilized is
a) Uterus
b) Cervix
c) Fallopian tube
d) Ovary
Answer:
a) Uterus

Question 2.
The Hormone responsible for wilting of leaves
a) Abscisic acid
b) Gibberlius
c) Cytokinius
d) Auxius
Answer:
a) Abscisic acid

Question 3.
What percentage of sunlight is captured by plants to convert it into food energy
a) 1%
b) 10%
c) 50%
d) 100%
Answer:
a) 1%

Question 4.
The auto trophic mode of nutrition is requires
a) CO₂
b) Chlorophill
c) Sunlight
d) All the above
Answer:
d) All the above

Question 5.
Which of the following is a plant Hormones
a) Insulin
b) Thyroxin
c) estrogen
d) Cytokinin
Answer:
d) Cytokinin

Question 6.
Brain is responsible for
a) thinking
b) regulating heartbeat
c) balancing the body
d) all the above
Answer:
d) all the above

Question 7.
The gap between two neuton is called a
a) deudrite
b) synapse
c) Axon
d) impulse
Answer:
b) synapse

Question 8.
Average adult brain weight
a) 1200g
b) 1400g
c) 1600g
d) 1800g
Answer:
b) 1400g

Question 9.
Average baby brain weight
a) 200g
b) 360g
c) 400g
d) 600g
Answer:
b) 360g

Question 10.
Brain protected by a bony case
a) Cranium
b) Skin
c) Skull
d) None of these
Answer:
a) Cranium

KSEEB Class 10 Science Control and Coordination Additional Questions and Answers

Question 1.
Draw a neat labelled diagram of human brain.
Answer:

Question 2.
What is synapse?
Answer:
The functional junction between two neurons is called synapse.

Question 3.
What is the function of peripheral nervous system? Mention its components?
Answer:
Peripheral nervous system facilitates the communication between the central nervous system and other parts of the body. PNS consists cranial nerves arising from the brain and spinal nerves arising from the spinal cord.

Question 4.
Which are the two types of muscles?
Answer:
Voluntary muscles and involuntary muscles.

Question 5.
The part of the brain concerned with speech is
a) Cerebellum
b) Mid brain
c) Cerebrum
d) Medulla
Answer:
c) Cerebrum

Question 6.
Gustatory receptors are found in
a) Eyes
b)Nose
c) Tongue
d) Skin
Answer:
c) Tongue

Question 7.
Vertebral column protects
a) Spinal cord
b) brain
c) Heart
d) None of the above
Answer:
a) Spinal cord.

Question 8.
Synapse is bringing together of two
a) Venules
b) nephrons
c) arteries
d) neurons
Answer:
(d) neurons

Question 9.
Differentiate between cranial nerves and spinal nerves.
Answer:

Cranial nerves	Spinal nerves
Cranial nerves arise from different parts of the brain.	Spinal nerves arise from spinal cord.

Question 10.
How is brain protected in our body?
Answer:
The brain sits inside a bony box called cranium. Inside the box, the brain is contained in a fluid (cerebro spinal fluid) – filled balloon like sac (Meninges) which provides further shock absorption.

Question 11.
Which part of the brain receives sensory impulses from various receptors?
Answer:
Forebrain

Question 12.
Growth of roots is
a) Phototropism
b) Hydro tropism
c) Geotropism
d) Both b and c.
Answer:
d) Both b and c.

Question 13.
Growth of pollen tubes towards ovules is
a) Chemotropism
b) Geotropism
c) Hydro tropism
d) Phototropism.
Answer:
a) Chemotropism

Question 14.
The hormone that promotes rapid cell division in fruits and seeds is
a) Auxin
b) Gibberellins
c) Abscisic acid
d) Cytokinins
Answer:
d) Cytokinins

Question 15.
Wilting of leaves is promoted by
a) Cytokinins
b) Abscisic acid
c) Gibberellins
d) Auxin.
Answer:
b) Abscisic acid.

Question 16.
Stimulation of cell division is concerned with
(a) Cytokinin
(b) Gibberellin
(c) Auxin
(d) Abscisic acid
Answer:
a) Cytokinin

Question 17.
Which of the following have the maximum concentration of gibberellins?
(a) mature seeds and young leaves.
(b) mature seeds and old leaves
(c) young seeds and young leaves
(d) old leaves and young seeds
Answer:
(c) young seeds and young leaves

Question 18.
How is Abscisic acid helpful to plants?
Answer:
Abscisic acid inhibits seed germination (dormancy). Thus it helps seeds to withstand desiccation and other factors unfavourable for growth.

Question 19.
Functions of the following:
1) Sensory neuron
2) Cranium
3) Vertebral column
4) Motor Neuron
Answer:

1. Information from receptors to brain
2. Protect the brain
3. Protect the spinal cord
4. Information from brain to spinal cord

Question 20.
Name the Hormones
a) Metabalism of carbohydrates, fats and protein
b) balance of calcium and phosphate
c) balance blood pressure
d) development of moustache and bread in male
e) Controlling the uterus changes in menstural cycle
f) Voluntary action
g) Involuntary action
Answer:
a) Thyroxine
b) Parathormone
c) Adrenline
d) Testosterone
e) Progesterone
f) Cerebellum
g) Nedulla

Question 21.
How do we respond when adrenal, gland secretion its hormones.
Answer:

• Hear beat faster
• Breathing rate increases
• Situation to emergency

Question 22.
Match the following:

A	B
1. Under secretion of growth Hormones	a) Giantism
2. Hyper secretions of growth Hormones	b) Dwarfism
3. Under secretion of insulin	c) Goitre
4. Deficiency of Iodine	d) Diabetes

Answer:

1. b) Dwartism
2. a) Giantism
3. d) Diabetes
4. c) Goitre

Question 23.
Functions of the following organs:
a) Hypothalamus
b) Medulla ablongata
c) Thalumus
d) Pons
e) Cerebrum
f) Cerebellum
Answer:
a)

• Control body temperature
• Maintain water salance
• Control urge of eating drinking
• Control pitutary gland

b) It controls involuntary actions such as breathing, blood pressure. It regulates reflex response like salivations and vomiting.

c) Send sensory information to cerebrum.

d)

• It control breathing rate
• It controls facial expressions
• Mastications of food

e)

• It is the main thinking part of brain
• It is responsible for reasoning
• Will power
• Intelligence
• Sight
• Hearing

f)

• It controls and coordinates different muscular actions.
• It maintains posture and equilibrium of the body during various activities such as walking drinking riding etc.

Question 24.
Functions of following plant Hormones:
a) Auxius
b) Gibberellins
c) Cytokinins
d) Abscissic acid
e) Ethylene
Answer:
a)

• It promote growth
• It helps in the elongation of cells
• It helps in the bending of stem towards light sources.

b) It helps in the growth of the stem and flower.

c)

• It promotes cell division.
• It helps in rapid cell division in fruit and seeds.
• It helps in opening of stomata during day time.

d)

• It inhibits the growth of plant
• It is responsible for wilting of leaves.
• It helps in the closing of stomata during night.

e)

• Ripening of fruit ageing leaves and flowers.

Question 25.
List the Hormone and functions of following endocrine glands:
a) Pituitory gland
b) Thyroid
c) Adrenal gland
d) Pancreas
e) Testies
f) Ovaries