Answer:
Explanation:
a is always true no matter what
Answer:
B) cAMP
Explanation:
Phosphodiesterase is an enzyme that breaks a phosphodiester bond, for example in molecules such as cAMP and cGMP. So, phosphodiestarases are are regulators of signal transduction: regulate the duration of signaling pathway.
Caffeine is central-nervous-system stimulant and the mechanisms of its action usually are: mobilization of intracellular calcium or inhibition of specific phosphodiesterases.
Dermis and Epidermis. The Epidermis contains keratinized cells. The Dermis <span>contains papillae.</span>
I believe flagellates would be classified as heterotrophic protists With flagella. It's an animal-like protist.
