Carbohydrates are stored in animal cells in the form of
A. triacylglycerol.
B. starch.
C. glycogen.
D. protein.
E. cellulose.
Answer: C
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__________ are structures that promote the upward flow of blood in leg veins by preventing backflow.
Fill in the blank(s) with the appropriate word(s).
Which of the following directly initiates the release of calcium ions from the endoplasmic reticulum?
A. Inositol triphosphate (IP3) B. Phospholipase C C. Calmodulin D. G-proteins
The all-or-none principle states that
A) all stimuli will produce identical action potentials. B) all stimuli great enough to bring the membrane to threshold will produce identical action potentials. C) the greater the magnitude of the stimuli, the greater the magnitude of the action potential. D) only sensory stimuli can activate action potentials. E) only motor stimuli can activate action potentials.
Although hormones influence activity in the neural and reproductive systems, they do not influence the digestive system
Indicate whether this statement is true or false.