Answer:
a. It is a hormone that acts upstream in the signaling pathway (i.e., acting as a ligand by binding to cell receptors)
b. Dopamine-mediated pathways
Explanation:
It is well known that many cellular transduction pathways are activated via binding of signaling molecules (ligands) to receptors capable of triggering signaling cascades into the cell. For example, dopamine is a signaling hormone (neurotransmitter) involved in diverse brain processes (i.e., motor control, emotional response, etc). It is a neurotransmitter that binds to dopamine receptors and then stimulates the enzyme adenylate cyclase in a process that subsequently activates the production of the second messenger cyclic adenosine monophosphate (cAMP). Finally, cAMP acts as an intracellular signal transductor that play roles in many biological processes by transferring into the cell the effects of dopamine.
Answer:
Explanation:
cardiovascular system is the circulatory system, it permits the circulation of blood and allows for transport of nutrients such as amino acids and electrolytes, oxygen and carbon dioxide gases, hormones, and blood cells in the body. It also helps the body to provide nourishment and fight against diseases and maintain homeostasis.
It is consider an high way because of its function. An high way allows for free passage, with often time no obstruction this is what cardiovascular system does they allow for movement of blood and essential nutrient in the body system for effective function of our body.
Answer:
The floating leaves had stomata on the upper surface, were thicker and contained more chlorophyll per surface area than the submerged leaves.
Explanation:
U 2 can help me by marking as brainliest.........
C. He compared two groups of finches to illustrate natural selection
(although it was actually 4 groups of finches from 4 different islands)
The stubbing of the toe on the edge of the bedpost will result in the release of endorphins. Endorphins are the neurotransmitters that pass the nerve signals from one neuron to another. The endorphins are released in response to stimuli such as fear, pain and stress. These are released in the different parts of the nervous system, and the pituitary gland. The stabbing of the toe will act as a pain stimuli for the release of endorphins.
Hence, the answer is 'Endorphins'.