Explain the following terms : (i) Reflex action (ii) Vaccination (i

1.	Explain the following terms : (i) Reflex action (ii) Vaccination (iii) Turgidity (iv) Bleeding in plants (v) Cataract.
Answer» (i) Reflex Action: Reflex action is an automatic, quick and involuntary action in the body brought about by a stimulus. Reflexes are of two types : (1) Simple (natural) reflexes and. (2) Conditioned (acquired) reflexes. (ii) Vaccination: Vaccination is the practice of artificially injecting mild form of the germs; Weakened (attenuated) germs, killed germs or the toxins produced by the germs into the body for the development of resistance to diseases. (iii) Turgidity: The state in which the cell wall is fully stretched and cannot accommodate any more water. (iv) Bleeding in plants: In plants direct flowing out of plant sap from any cut surface or from an injured part. (v) Cataract: The eye condition in which the lens turns opaque and vision is cut down even to total blindness.

Explain the following terms : (i) Reflex action (ii) Vaccination (iii) Turgidity (iv) Bleeding in plants (v) Cataract.

Answer»

(i) Reflex Action: Reflex action is an automatic, quick and involuntary action in the body brought about by a stimulus. Reflexes are of two types : (1) Simple (natural) reflexes and. (2) Conditioned (acquired) reflexes.

(ii) Vaccination: Vaccination is the practice of artificially injecting mild form of the germs; Weakened (attenuated) germs, killed germs or the toxins produced by the germs into the body for the development of resistance to diseases.

(iii) Turgidity: The state in which the cell wall is fully stretched and cannot accommodate any more water.

(iv) Bleeding in plants: In plants direct flowing out of plant sap from any cut surface or from an injured part.

(v) Cataract: The eye condition in which the lens turns opaque and vision is cut down even to total blindness.

Discussion

No Comment Found

Related InterviewSolutions

A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis to :(A) Remove starch from the plant. (B) Ensure that starch is not translocated from the leaves. (C) Remove chlorophyll from the leaf of the plant. (D) Remove starch from the experimental leaf.
The producer of Lime Fresh’ tea introduces ‘Buy one Get one’ scheme on all the products of ‘Lime Fresh’. Identify the promotional strategy’ used by the producer. State any one objective that could be met by this strategy.
A stringed musical instrument, such as the sitar,is provided with a number of wires of different thicknesses. explain the reason for this.
Mention whether the following would result in inflow, outflow or no flow of cash :(i) Issue of fully paid Bonus Shares (ii) Cash withdrawn from Bank
State with reason whether the following would result in inflow, outflow or no flow of cash :(i) Charging depreciation on furniture. (ii) Cash withdrawn for bank for office use.
Give four points of anatomical differences between a monocot stem and a dicot stem.
State the conditions required for total internal reflection of light to take place.
State the conditions required for total internal reflection of light to take place.
(i) When does a ray of light falling on a lens pass through it undeviated ? (ii) Which lens can produce a real and inverted image of an object ?
When acoustic resonance takes place a loud sound is heard. Why does this happen ? Explain.