The heart secretes the hormone ________, which lowers blood pressure by increasing the excretion of salt and water
Fill in the blank(s) with correct word
atrial natriuretic peptide (or ANP)
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Which of the following events is least likely a result of protein phosphorylation?
A. reduction in the activity of an enzyme B. transport of the protein to the nucleus C. the specific binding of a regulatory protein D. targeting of the protein for degradation
In the avian and mammalian eye, the lens remains stationary but changes shape in order to focus on objects at various distances. This is called "accommodation" and is accomplished through adjusting muscle control of the lens in order to
A. control the amount of light admitted to the eye through the pupil. B. alter the sensitivity of the eye to varying light levels. C. convert light energy into electrical signals by the retina. D. bend light rays to varying degrees according to the angle at which light enters the eye. E. regulate the vitreous humor volume.
A specific type of reproduction in which a new organism is an outgrowth of the parent is
A. budding. B. fragmentation. C. cloning. D. sexual.
Answer the following questions true (T) or false (F)
1. Integral proteins always extend completely through the plasma membrane. 2. The chief component of the plasma membrane is the phospholipid bilayer. 3. The glycocalyx is found just inside the plasma membrane of the cell.