Answer:
B is your answer
Explanation:
Convergent boundaries: where two plates are colliding.
No, this is false!
In some case, the brain can predict the stimuli and so start the interpretation already during the sensory perception, but in the usual case the stimuli have to first be perceived by the senses and only later can they be interpreted by the brain.
Indeed, steroid hormones have an important role in the well-being of the individual through specialized cells (having specific receptors). Take the example of vitamin D.
Vitamin D is involved in calcium and phosphorus absorption by the intestines, as well as in their reabsorption by the kidneys. It is involved also in bone mineralization of the skeleton and joints, as well as on muscle tone.
The mechanism of action of the hormone is identical to the scheme:
Its carrier is vitamin D-binding protein
The cell may be an intestinal cell, bone cells or renal cells.
The vitamin acts on the DNA is activating / inhibiting certain genes encoding proteins so as to increase the level of calcium in blood.
