As an adult human ages, the blood vessels lose their elasticity, and blood pressure drops as dilation occurs
Indicate whether the statement is true or false
FALSE
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Somatic cells are those that give rise to sperm and egg cells
Indicate whether the statement is true or false
Which is the gametophyte form of most liverworts?
a. a seta b. gemmae c. a thallus
d. a frond e. a prothallus
The resting potential across a typical neuron membrane is approximately ____ inside relative to outside.
A. ?70 microvolts B. ?70 millivolts C. ?70 volts D. +70 millivolts E. +70 megavolts
The adaptive immune system is capable of mounting specific responses to particular microorganisms because
A) lymphocytes are able to change their antigen specificity as required to fight infection. B) stem cells determine which type of B and T cells to make. C) the body contains an enormous diversity of lymphocytes, each with the ability to respond to a different antigen. D) stem cells make different antigen receptors depending on the invading microorganism.