Answer:
no 1. A is the answer
Explanation:
hope this helps and plz mark me as the brainliest
Answer:
14.to 17 hours of a 24 hour period . say the national sleep faoundation , some newbourn sleep up to 18.to 19 hours a day
Answer:
it needs carbon dioxide and water to make oxygen and glucose
Explanation:
Blood flow through most organs in the systemic circuit is regulated primarily by increasing or decreasing the sympathetic activity to arterioral smooth muscles in the organ. Another form of regulation called active hyperemia, depends upon the ,metabolic activity of the organ. Increased activity leads to increased interstitial fluid metabolites, which cause dilation of the arterioles, the former is a type of extrinsic regulation of blood flow; the latter is an example of intrinsic regulation.
