Blood flow through a capillary bed is regulated by precapillary sphincters.
Answer the following statement true (T) or false (F)
True
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Despite being a more immediate source of energy for a cell, glucose must be stored as glycogen in order to prevent excess intracellular fluid from accumulating.
Answer the following statement true (T) or false (F)
Platyhelminthes can live without a circulatory or respiratory system because
A) They rely on their digestive system. B) They are dorsoventrally flattened. C) The kidney excretes excess waste materials. D) The epidermis secretes lubricants.
A newly discovered region of the brain, known as the default mode network, consumes 60-80% of the brain's energy and is more during daydreaming than during focused tasks
Indicate whether the statement is true or false
Which of the following is NOT a characteristic of epithelial tissue?
A. It has many blood vessels to support its nutrient needs. B. It readily divides to produce new cells. C. It has a basement membrane to connect to underlying tissue. D. It always has a free surface.