Explanation:
it is unique in being the only human bone that is not attached by joints to any other bone, but is suspended in the neck by muscles and ligaments alone.
The natural blind spot is due to lack of receptors where the optic nerve and blood vessels leave the eye. There can also be artificial blind spots when something blocks light from reaching the photoreceptors, or when there is local adaptation of the retina as just after seeing a bright light
Answer:
Paranthropus robustus
Explanation:
2.5 million years ago some autralopithecines were identified by dating fossils from South Africa, meaning they lived a good period of time. Of these, Australopithecus africanus is well known and is a little closer to our species. Other fossils found in excavations in both southern Africa and eastern Africa have been found to be of more recent specimens 2.5 to 2 million years ago. These specimens were classified as Paranthropus robustus and Paranthropus boisei. These australopithecine species became extinct and left no current descendants.
The correct option is ALDOSTERONE.
Angiotensin ll is one of the most potent sodium retaining hormones. It regulates aldosterone release from the adrenal cortex. The aldosterone hormone stimulates sodium re-absorption through mineralocorticoid receptors in the connecting and cortical segments of the collecting tubules.
