Tight junctions between muscle cells help muscle tissue function as a unit
Indicate whether the statement is true or false.
ANS: F, Gap junctions
You might also like to view...
Compared with today, the temperature on Earth during its first half-billion years was probably
A) considerably warmer. B) considerably colder. C) about the same as today. D) about the same as today on average, but the diurnal fluctuations were much greater.
In your fly laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity
Three human disorders–fragile-X syndrome, myotonic dystrophy, and Huntington disease–are conceptually linked by a common mode of molecular upset. Describe the phenomena that link these disorders
What will be an ideal response?
Under which of the following situations would receptor down-regulation most likely occur?
a. The number of G proteins is too high. b. The concentration of a hormone is too high. c. The cell is unable to manufacture cyclic AMP. d. The concentration of a neurotransmitter is too low. e. The number of receptors in the plasma membrane is too low.