Explain the meaning of this statement: Fats are easy to absorb but difficult to digest
What will be an ideal response?
Fats are not water soluble, which means that they tend to coalesce and form droplets in gut fluids. In order for them to be chemically digested, they must be made more water soluble or emulsified. Emulsification is achieved through the release of bile salts. Upon initial digestion by lipases, the resulting fatty acids and monoglycerides attach to bile to form micelles. These micelles can then move to the cell surface, where absorption occurs by passive diffusion — an energy-free form of transport.
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Answer the question using the accompanying figure. The letter “A” represents ____
a. rapid growth b. negative growth c. prereproductive populations d. postreproductive populations e. zero growth
Arthritis is a condition in which
1.Bones are unusually fragile and break easily. 2.The bone marrow does not develop properly. 3.There is an inflammation of the joints. 4.The epiphyses do not permit growth. 5.Tendons are stretched.
Cytotoxic T cells produce ____
a. cytokines b. antibodies c. plasma cells d. perforins e. histamine
You are driving at night and decide to pass a slow-moving car. You notice that although you can see the car, you can't tell what color it is. This is due to
A) the poor ability of cones to function in low light. B) the poor ability of rods to function in low light. C) a reduced ability to focus in low light situations. D) the constriction of your pupil in low light situations, which reduces color vision.