(a) What is meant by reflex action?
(b) State whether the following are simple reflexes, conditioned reflexes or neither of the two.
(i) Sneezing ____________
(ii) Blushing
(iii) Contraction of eye pupil _
(iv) Lifting up a book _
(v) Knitting without looking
(vi) Sudden application of brakes of the cycle on sighting an obstacle in front _______________________________

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Solution

(a) It is an automatic/quick/immediate, involuntary action in the body brought about by a stimulus.
(b)
(i) Sneezing - Simple
(ii) Blushing - Simple
(iii) Contraction of eye pupil - Simple
(iv) Lifting up a book - Conditioned
(v) Knitting without looking - Conditioned
(vi) Sudden application of brakes of the cycle on sighting an obstacle in front - Conditioned

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Similar questions

(a) What is meant by reflex action?

(b) State whether the following are simple reflexes, conditioned reflexes or neither of the two.

(i) Sneezing - __________________

(ii) Blushing - ___________________

(iii) Contraction of eye pupil - _________________

(iv) Lifting up a book - _________________

(v) Knitting without looking - ____________________

(vi) Sudden application of brakes of the cycles on sighting an obstacle in front - ______________

Q. Suppose A and B are two monomers.
Match the following types of Copolymers with their correct arrangements.

List - I List - II
(i) Random Copolymer 1) (A-A-A-A)-(B-B-B-B)-(A-A-A)

(ii) Block Copolymer 2) -A-B-A-B-A.

(iii) Graft Copolymer 3) -A-B-A-A-A-B-B-A-B-A-A-

B-B-B-B-

|

(iv) Alternating Copolymer 4)-A-A-A-A-A-A-A-A-A-

|

B-B-B-B-

Let A = {a, b, {c, d}, e}. Which of the following are false and why ?

(i) {c, d} $\subset$ A (ii) {c, d} $ϵ$ A (iii){{c, d} $ϵ$ A }

(iv) a $ϵ$ A (v) a $\subset$ A (vi) {a, b, e} $\subset$ A

(vii) {a, b, e} $ϵ$ A (viii) {a, b, c} $ϵ$ A (ix) $ϕ$ $ϵ$ A (x) { $ϕ$ } $\subset$ A

State, with reason, whether the following are true or false. A, B and C are matrices of order
$2 \times 2.$
(i) A + B = B + A
(ii) A - B = B - A
(iii) (B. C ) . A = B. (C . A)
(iv) ( A + B ) . C = A . C + B . C
(v) A. (B -C ) = A. B - A . C
(vi) (A - B ) . C = A. C - B . C
(vii) $A^{2} - B^{2} = (A + B) (A - B)$
(viii) $(A - B)^{2} = A^{2} - 2 A . B + B^{2}$