Which of the following is NOT a concept of the cell theory?
A) The cell is the basic unit of life.
B) The metabolic activities of individual cells in a multicellular organism are coordinated and essential for survival.
C) Each cell of a multicellular organism maintains its own metabolism.
D) All cells arise spontaneously.
D
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Shivering is a way of generating heat via dilation of many blood vessels.
Answer the following statement true (T) or false (F)
Which of the following statements correctly describes fatty acids?
A) Volatile fatty acids are the longest fatty acids. B) Saturated fatty acids are linear in structure and have one or no double bonds. C) Medium-chain fatty acids are produced by ruminants when cellulose is fermented. D) Double bonds in fatty acids create bends/kinks in the chain, thus altering membrane structure.
Protein folding can take place spontaneously or with ________.
Fill in the blank(s) with the appropriate word(s).
What is the role of serotonin in the digestive tract?
A. Decrease nausea B. Stimulate motility C. Inhibit motility D. Hormone release