Metal ions such as magnesium or calcium can serve as enzyme ________.
coenzymes
ribozymes
substrates
cofactors
cofactors
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Which of the following would reduce the glomerular filtration rate?
A) Vasoconstriction of the afferent arteriole B) An increase in osmotic pressure in the glomerular capsule C) Vasoconstriction of the efferent arteriole D) Vasodilation of the afferent arteriole E) A drop in oncotic pressure
Effects of aldosterone include
A. excretion of bicarbonate ions and osmosis of water into the blood. B. excretion of potassium ions and osmosis of water into the blood. C. excretion of water and osmosis of potassium ions into the blood. D. excretion of calcium ions and potassium ions.
Fertilization usually occurs in the
A. uterine tube. B. vagina. C. ovary. D. uterus.
The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels. All of the following are consequences of this inactivation except one
Choose the statement below that is not a consequence of the closing of inactivating gates. A) This allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell. B) This allows for the one way transmission of action potential down the axon. C) This limits the frequency of action potentials down the axon. D) This stops the depolarization of the axon membrane.