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Osmotic Function - Essential Elements
Plant cells generally contain mineral ions 10 to 1000 times higher in concentration than the surrounding soil. That is why water enters the cells by osmosis and builds up turgor. You know that turgor maintains the shape and size of non-rigid plant parts such as leaves. Potassium is a key ion in this respect. Changes in its concentration in guard cells affect turgor and thus result in opening and closing of stomata. Turgor is also essential for the growth of plant cells.
Physiological Changes - Consequences of Aging Various physiological regulatory mechanisms show decreased efficiency due to aging. For instance, normally the glucose level in t
What is Spermatogenesis in human biology? The male sex cells, or sperm, are produced in the oval-shaped testes, the primary sex organs of the male reproductive system, in a pro
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ways in which modern agricultural activities may threaten survival species
What is a population? In Biology a population is a set of individuals of the similar species living in a given place and in a given time.
Briefly explain about the Flexed-arm Hang Test? Persons who cannot do one pull-up may do the flexed-arm hang. Using the same hand position as in pull-ups, subject takes flexed-
Advantages of Autonomous Transactions An autonomous transaction, once started is fully independent. It shares no locks, resources, or commit-dependency with the main transacti
What is photoperiodism? Photoperiodism is the biological response shown by some living beings to their daily time of light exposure (photoperiod).
The regulation mechanism involves: a) The hormones catecholamines (epinephrine, norepinephrine) and glucagon cause the increase in CAMP levels in cells. This CAMP activates p
Explain the role of calcium ions, troponin and F-Actin during contraction in striated muscles of humans?
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