Plesse answer the questions1. Name the fluid present in the meninges of the brain and what is its function?2. Write one word for the following statements:a. Part of brain which enables us to stand erect.b. Part of brain that is the seat of intelligence.c. The term used for the space between nerve ending of one neuron and theeffector(muscle).d. A phytohormone that causes fruit ripening.e. A gaseous Plant growth regulator.f. A growth inhibiting plant hormone.g. A plant hormone present in the shoot tip of plants.h. The part of CNS which is the centre for reflex action.3. Arrange the following in proper sequence:Receptor organ, muscle action, spinal cord, motor nerve, stimulus, sensory nerve.4. What is cranium?Two to three marks questions5. Draw neat and labeled diagram of the following:a. Human brainb. Neuronc. Reflex action6. List the various functions of Brain.7. Mentions the functions of cerebrum , cerebellum, medulla8. Explain reflex action and reflex arc with the help of an example.9. Write a short note on hind brain.PHYSICSQ1. Write the rule which determines the direction of magnetic field developed around a straightconductor, when current is passed through the conductor.Q2. What is a solenoid? Draw the pattern of magnetic field lines of a solenoid through which asteady current flows.Q3. What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can betransformed into an electromagnet?Q4. What is magnetic force? How will you find its direction?Q5.What is electromagnetic induction?Q6. Explain briefly different methods of producing induced emf/current.Q7. What is the role of fuse, used in series with any electric appliance? Why should fuse withdefined rating not be replaced by one with a larger one?Q8. (a) Distinguish between overloading and short circulating in a domestic circuit.(b) Why is it essential to earth electrical appliances having metallic body?Q9. (a) What is electromagnetic induction?(b) Explain the various methods of producing induced current.(c) State the rule which gives the direction of induced current.(d) Name two devices which work on the principle of electromagnetic induction.Q10. (a) Which effect of the electric current is utilised in the working of an electrical fuse?(b) A fuse is connected in series or in parallel in household circuit?(c) Draw a schematic labelled diagram of a domestic circuit which has a provision of amain fuse, meter, one light bulb and a switch/socket.CHEMISTRYQ1. Dry ammonia has no action on litmus paper but a solution of ammonia in water turns redlitmus paper blue. Why is it so?Q2. A compound which is prepared from gypsum has the property of hardening when mixedwith proper quantity of water. Identify the compound and write its chemical formula.Q3.What is the role of tartaric acid in baking powder?Q4. Which chemicals are used in soda-acid fire extinguishers?Q5. What is baking powder? How does it make the cake soft and spongy?Q6. What is the chemical formula for Plaster of Paris? How is it prepared? State the commonand chemical names of the compound formed when Plaster of Paris is mixed with water.Q7. Write the chemical formula for washing soda. How may it be obtained from baking soda?Name an industrial use of washing soda other than washing clothes.Q8. Given below are the pH values of four different liquids:7.0, 14.0, 4.0, 2.0Which of these could be that ofa. juiceb. Distilled waterc. 1 M NaOH solutiond. Tomato juiceQ9. State the chemical property in each case on which of the following uses of baking soda arebaseda. As an antacidb. As a constituent of baking powder.Q10. A chemical compound having a strong smell of chlorine is used to disinfect water. Namethe compound and write a chemical equation to show its preparation. Give its one use.Q11. A blue salt becomes white on heating. With the help of a reaction, explain the change incolour.Q12. Write the names of five hydrated salts with their colours.Q13. How are bases different from alkalis? Are all bases alkalis?Q14. Which of the following substances in water will not show acidic properties?Sugar, alcohol, acetic acid, urea, nitric acid and carbon dioxide
Answers
Answer 2 (a): Cerebellum along with an organ known as vestibular apparatus present in inner ear helps us to maintain balance of body and stand erect.
Answer 2 (b): Parietal and frontal lobes according to some scientists who calls it Parieto-frontal Integration Theory.
Answer 2 (c): Synapse or synaptic cleft
Answer 2 (d) and (e): Ethylene
Answer 2 (f): Abscisic acid
Answer 2 (g):Auxin or IAA (Indole-3-acetic acid)
Answer 2 (h):Cerebellum
Answer 3 : Stimulus, Receptor Organ, Sensory Nerve, Spinal cord, Motor Nerve, Muscle Action.
Answer 4: Skull is composed of cranium (brain box) which protects brain and mandibles (facial bones). Cranium consist of frontal, parietal, occipital, temporal, sphenoid and ethnoid bones. Cranium is made up of eight bones which joins with each other at places called sutures.
Answer 6: Functions of brain:
(1) Central Nervous System consists of brain and spinal cord.
(2) Brain controls and coordinates all the functions of body.
(3) Various part of brain performs various functions.
(4) There are motor and sensory areas in brain which help in conduction of nerve impulses.
(5) It has broadly two parts: cerebrum and cerebellum.
(6) Cerebrum helps in interpretation of various impulses which we gain by seeing, listening, smelling, tasting and by touch.
(7) It also analyze and interpret various situations.
(8) Cerebellum helps in maintaining balance of the body.
(9) Brain also helps in memory, remembrance, emotions, intelligence etc.
(10) It has various glands which secrete neurotransmitters and hormones from thalamus, hypothalamus,pituitary and pineal gland.
(11) It also controls respiration, circulation,excretion reproduction, hunger etc.
Answer 7:
Answer:
ExplanatAnswer 1: Cerebrospinal fluid. Its function is to protect brain from injuries by acting as a cushion. Also it supplies nutrients to brain and spinal cord and remove wastes from these sites.
Answer 2 (a): Cerebellum along with an organ known as vestibular apparatus present in inner ear helps us to maintain balance of body and stand erect.
Answer 2 (b): Parietal and frontal lobes according to some scientists who calls it Parieto-frontal Integration Theory.
Answer 2 (c): Synapse or synaptic cleft
Answer 2 (d) and (e): Ethylene
Answer 2 (f): Abscisic acid
Answer 2 (g):Auxin or IAA (Indole-3-acetic acid)
Answer 2 (h):Cerebellum
Answer 3 : Stimulus, Receptor Organ, Sensory Nerve, Spinal cord, Motor Nerve, Muscle Action.
Answer 4: Skull is composed of cranium (brain box) which protects brain and mandibles (facial bones). Cranium consist of frontal, parietal, occipital, temporal, sphenoid and ethnoid bones. Cranium is made up of eight bones which joins with each other at places called sutures.
Answer 6: Functions of brain:
(1) Central Nervous System consists of brain and spinal cord.
(2) Brain controls and coordinates all the functions of body.
(3) Various part of brain performs various functions.
(4) There are motor and sensory areas in brain which help in conduction of nerve impulses.
(5) It has broadly two parts: cerebrum and cerebellum.
(6) Cerebrum helps in interpretation of various impulses which we gain by seeing, listening, smelling, tasting and by touch.
(7) It also analyze and interpret various situations.
(8) Cerebellum helps in maintaining balance of the body.
(9) Brain also helps in memory, remembrance, emotions, intelligence etc.
(10) It has various glands which secrete neurotransmitters and hormones from thalamus, hypothalamus,pituitary and pineal gland.
(11) It also controls respiration, circulation,excretion reproduction, hunger etc.
Answer 7:ion: