During REM sleep, an EEG shows
A) a flat trace with very few waves.
B) a pattern that is similar to when a person is in deep sleep.
C) an irregular, rapidly changing pattern.
Answer: C
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In the lungs of cystic fibrosis patients, ____
a. chloride ions are stuck inside epithelial cells b. water is excessively abundant on epithelial surfaces c. epithelial surfaces are coated with slippery mucus d. excess water and chloride ions are pumped out of epithelial cells e. chloride ions are not transported out of epithelial cells, and epithelial surfaces are dry
Fibrous layer
What will be an ideal response?
Which of the following is an adaptation to increase the surface area of a part of a cell that is involved in cellular respiration?
A) the cristae of a mitochondrion B) the outer membrane of a chloroplast C) the grana of a chloroplast D) the endoplasmic reticulum
What distinguishes an embryonic stem cell from a somatic cell of an adult organism?
A) Embryonic stem cells cannot be reprogrammed, but somatic cells can be reprogrammed. B) Embryonic stem cells can produce more of themselves as well as produce specialized cells, but somatic cells are already specialized. C) Somatic cells can produce more of themselves and produce stem cells. D) Somatic cells can change into specialized cells, while stem cells can only produce more of themselves.