If blood volume increases, blood pressure will ________ and the firing rate of baroreceptors will ________.
A. decrease; increase
B. decrease; decrease
C. increase; decrease
D. increase; increase
Answer: D
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A team of researchers has developed a poison that has proven effective against lamprey larvae in freshwater cultures. The poison is ingested and causes paralysis by detaching segmental muscles from the skeletal elements
The team wants to test the poison's effectiveness in streams feeding Lake Michigan, but one critic worries about potential effects on lancelets, which are similar to lampreys in many ways. Why is this concern misplaced? A) A chemical poisonous to lampreys could not also be toxic to organisms as ancestral as lancelets. B) Lamprey larvae and lancelets have very different feeding mechanisms. C) Lancelets do not have segmental muscles. D) Lancelets live only in saltwater environments. E) Lancelets and lamprey larvae eat different kinds of food.
People who do not exhibit changes in blood pressure based on a circadian rhythm are more likely to have a heart
attack.
Indicate whether the statement is true or false.Explain why the biological species concept cannot be applied to organisms such as bacteria and some rotifers. What will be an ideal response?
The final electron acceptor associated with photosystem I is _____
A) oxygen B) water C) NADP D) NADPH