All organic compounds contain carbon
Indicate whether the statement is true or false
TRUE
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Solution 1 has a higher concentration of NaCl than solution 2 . A membrane permeable only to Na+ and water separates the two membranes. Which of the following is true?
a. Na+ will diffuse into solution 2 until the two solutions become isotonic. b. Solution 2 has a higher osmolarity. c. A membrane potential will develop, with the negative side being in solution 1. d. Solution 2 will gain water from solution 1. e. Eventually, solution 2 will contain only Na+ and solution 1 will contain only Cl-
A nucleus is a
A. group of axons that travel together in the CNS. B. collection of neuron cell bodies within the PNS. C. network of nerves. D. collection of neuron cell bodies within the CNS. E. center that displays discrete anatomic boundaries.
Under the influence of the trophoblast, maternal blood vessels in the endometrium
A) disappear. B) attach to the inner cell mass. C) break down and form sinuses or lacunae. D) form a capillary network in the trophoblast. E) increase in size and penetrate the blastocyst.
Like skeletal muscle cells, cardiac muscle cells have an absolute refractory period prior to repolarization
Fill in the blank with correct word.