Given below are five groups of five terms in each. Arrange the terms in each group in their proper sequence.
I.Renal Pelvis, Urethra, Ureter Kidney Urinary Bladder
ii. Sodium ions move into the axon, Repolarisation. Polarisation, Stimulus, Depolarisation
iii. ATP is produced, guard cells photosynthesise during the day guard cells become more turgid. guard cells become hypertonic, Potassium ions are actively pumped into the guard cells
iv Efferent ducts, Network of ducts, Seminiferous tubules. Urethra, Vas deferens v. Response, Effector Brain or Spinal Cord, Receptor Stimulus

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Solution

I. Kidney, Renal Pelvis, ureter, urinary bladder, urethra.
II. Polarisation, stimulus, Sodium ions move into axon, depolarisation, repolarization.
III. ATP is produced, potassium ions are actively pumped into the guard cells, guard cells become hypertonic, guard cells become more turgid, guard cells photosynthesize during the day.
IV. Seminiferous tubules, efferent ducts, the network of ducts, vas deferens, urethra.
V. Stimulus, receptor, brain or spinal cord, effector, response.

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During the day, chloroplasts in the guard cells photosynthesise, which leads to the production of ___. This is used to actively pump the ___ ions of the adjacent cells into the guard cells.

Q. Arrange the events of the opening of stomata in the correct sequence and choose the correct option accordingly.

I. Lowering of osmotic potential of guard cells.
II. Decline in guard cell solute.
III. Rise of potassium ion level in guard cells.
IV. Guard cells absorb water from neighboring epidermal cells.
V. Guard cells become flaccid.

Q. According to

H^{+} - K^{+}

exchange pump mechanism of stomatal movement
I.

K^{+}

ions accumulate in guard cells during the day.
II.

H^{+}

ions are pumped out from guard cells and

K^{+}

ions are pumped into guard cells.
III. Water potential of guard cells decreases with the accumulation of

K^{+}

ions together with

C l^{-}

and organic acid ions.
IV. Water enters into guard cells from epidermal and mesophyll cells due to decreased water potential of guard cells.

Given below are two sets (a and b) of five terms each. Rewrite the terms in their correct order so as to be in logical sequence.

(a) Afferent arteriole, renal vein, capillary network, glomerulus, efferent arteriole.

(b) Renal artery, urethra, ureter, kidney, urinary bladder.

Q. Select the correct events leading to the opening of the stomata. I. Decline in guard cell solutes. II. Lowering of osmotic potential of guard cells. III. Rise in potassium levels in guard cells. IV. Movement of water from neighbouring cells into guard cells. V. Guard cells becoming flaccid.

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