Explain How Blue Light Triggers the Movement of Hydrogen and Potassium

question 45

Essay

Explain how blue light triggers the movement of hydrogen and potassium ions across the membranes of guard cells and how this causes opening and closing of the stomata.

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Definitions:

Dermal Papilla

A small, nipple-like extension of the dermis into the hair follicle, containing capillaries that nourish the hair.

Spinothalamic Tracts

Neural pathways in the spinal cord that transmit pain and temperature sensations to the brain.

Dorsal Column Tracts

Sensory pathways in the spinal cord that convey touch, vibration, and proprioceptive information to the brain.

Tactile Corpuscles

Specialized nerve endings in the skin responsible for sensitivity to light touch.