Normally, an adult human has 23 chromosomes
Indicate whether the statement is true or false.
FALSE
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Elderly individuals generally have a _______ percentage of body fluid and are therefore _______ prone to fluid imbalances
A. high; more B. high; less C. low; less D. low; more
The hormone ANP causes an __________.
a) increase in blood pressure b) increase in GFR c) increase in blood volume d) increased ANP
A positive feedback loop occurs when the outcome of an event causes the event to continue occurring and amplifies its effects. Which of the following aspects of an action potential constitutes a positive feedback loop?
A. Opening of voltage-gated sodium channels causes voltage-gated potassium channels to open and release potassium to the extracellular environment, slowly counteracting sodium influx. B. The sodium-potassium pump exactly balances ion leaks by pumping three sodium and two potassium ions across the membrane. C. An initial flow of sodium ions into the neuron opens voltage-gated sodium channels, rapidly causing more sodium to enter. D. The threshold potential is around -55mV.
Potassium ion secretion along the distal convoluted tubule and collecting duct is stimulated by
A) ADH. B) aldosterone. C) EPO. D) ANP. E) cortisol.