Some enzymatic receptors and most G protein-coupled receptors transmit the signal into the cytoplasm by utilizing other substances within the cytoplasm that are referred to as:
A. genes.
B. intracellular receptors.
C. second messengers.
D. first messengers.
C. second messengers.
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Clams and oysters are:A
detritivores. B. herbivores C. omnivores. D. carnivores. E. filter feeders
The ability to maintain an upright position is due to ________ muscle contractions
Fill in the blank(s) with correct word
Which of the following statements does not belongs in the Introduction of a scientific paper?
A. The migratory movements of the birds depended on many factors B. To collect the samples, the animals were carefully removed from the inside of the plants C. The aerobic exercise is very important and creates deep changes in heart conditions D. Connective tissue is one of the four basic types of tissue E. The behavior doesn't depend on the climate conditions and seems to be more guided by Earth magnetism
Which of the following is not a type of joint?
A. cartilaginous B. suture C. fibrous D. trochanter E. synovial