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If a bird is trained to seek food on the western side of a cage open to the sky, and is then placed in a chamber with a controlled light cycle so that its circadian rhythm becomes phase-delayed by 6 hours (i.e., its circadian rhythm is 6 hours behind real time) , when it is returned to the open cage at noon in real time, it will seek food in the
Tight Junction
Junction between cells when adjacent plasma membrane proteins join to form an impermeable barrier.
Basement Membrane
A thin, fibrous structure that lies underneath epithelial cells, providing support and anchorage, and acting as a barrier against the spread of cells.
Gap Junction
Junction between cells formed by the joining of two adjacent plasma membranes; it lends strength and allows ions, sugars, and small molecules to pass between cells.
Adhesion Junction
Junction between cells in which the adjacent plasma membranes do not touch but are held together by intercellular filaments attached to buttonlike thickenings.
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