For several nights in a row, a sleep researcher wakes you up whenever you show signs of entering REM sleep. On the first night that you are allowed to sleep uninterrupted, you will most likely experience:
A) microsleeps.
B) a dramatic increase in stages 3 and 4 NREM sleep.
C) REM rebound.
D) very little REM sleep.
Answer: C) REM rebound.
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Which of the following occurs in E. coli when lactose is absent from its environment?
A. Large amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made. B. Trace amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made. C. No ?-galactosidase, lactose permease, and galactoside transacetylase is made. D. The lac operon is induced. E. Polycistronic mRNA levels would be very high.
Each antigen has one antigenic determinant site or epitope.
Answer the following statement true (T) or false (F)
When epinephrine binds to its G-protein linked receptor ____ is activated producing ___.
A. phospholipase C, diacylglyceride B. kinase, calcium C. kinase, transcription factor D. enzyme linked receptors, protein kinase E. adenylyl cyclase, cAMP
The movement of substances from the blood into the proximal tubule is known as ____.
Fill in the blank(s) with the appropriate word(s).