Answer:
A. synthesis of vitamin C.
Explanation:
Integumentary system refers to the skin and its appendages. So it doesn't have the role to synthesis vitamin C, but it can synthesis vitamin D through exposure to UV light. The major role of integumentary system is protective role (immuno defense-from infections, dehydration, temperature changes, protection of underlying tissue etc). It also contains many receptors (for pain, touch, temperature change) that detect environmental changes.
Answer:
Can I see the graph or the other options??
Explanation:
Explanation:
cAMP binds to protein kinase A and activates it, allowing PKA to phosphorylate downstream factors to produce a cellular response. cAMP signaling is turned off by enzymes called phosphodiesterases, which break the ring of cAMP and turn it into adenosine monophosphate (AMP).
<span>d. neither of these will cross a plasma membrane.
Glucose cannot diffuse across a plasma membrane as it is polar. Since the question doesn't specify the type of diffusion, simple diffusion is assumed.
If you count facilitated diffusion, then A is the answer.</span>
