It is important to ensure that your diet is adequately rich in vitamins because ________
A) very few foods contain vitamins
B) most vitamins are coenzymes needed to help the body utilize essential nutrients
C) all vitamins are water soluble and pass out of the body too quickly to ensure utilization
D) vitamins provide protection against the common cold
B
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The Frank-Starling law of the heart relates to how stretching of the ventricles during ventricular filling will affect stroke volume
Indicate whether the statement is true or false
Which result from activation of the renin-angiotensin system? select all that apply.
a) increased secretion of cortisol b) increased secretion of aldosterone c) vasodilation of afferent arteriole d) increased release of ADH e) stimulated thirst
Metal ions such as magnesium or calcium can serve as enzyme ________.
A. substrates B. coenzymes C. cofactors D. ribozymes
Amplification during a second-messenger cascade is beneficial because amplification:
A. takes small molecules and makes polymers out of them. B. results in the production of more of the first messenger. C. allows a cell to respond to more different hormones. D. allows small amounts of hormones to produce large responses in target cells.