Failure of the testes to descend into the scrotal sac is known as cryptorchidism
Indicate whether the statement is true or false
T
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The universal energy currency in cells is
a. ATP. b. glucose. c. glycogen. d. insulin. e. myosin.
The blood-brain barrier
1.results from microglia signaling adjacent cells of the brain capillaries to form tight junctions. 2.prevents most water soluble substances from moving between the blood and the interstitial fluid of the brain. 3.allows glucose to diffuse across the capillary walls. 4. allows changes in plasma potassium levels to cause corresponding changes in brain interstitial fluid potassium levels. 5. All of these are correct
true or false? At the end of meiosis I, there are two haploid cells, each with two sister chromatids per chromosome.
a. true b. false
Which does not occur during the G2 phase?
A. Enzymes needed for cell division are synthesized. B. Each DNA molecule replicates. C. Organelle production continues. D. Centriole replication is completed.