Answer:
To maintain body homeostasis
Explanation:
The endocrine system consists of the endocrine glands that release hormones directly int the blood. Those hormones bind to their receptors on the target cells and thus regulate their function. The major glands are:
pineal gland-releases melatonin, controls sleep cycle
pituitary gland-control growth, blood pressure, thyroid glands and metabolism etc.
pancreas-secretes insulin and glucagon, control of blood sugar levels
ovaries, testes-reproductive role (release female and male hormones)
thyroid gland-controls metabolism and protein synthesis
parathyroid gland-controls Ca levels
hypothalamus-connects nervous and endocrine systems, controls other glands
adrenal glands-release adrenalin and steroid hormones.
creating simple sugars from smaller molecules
Explanation:
The human cells are not capable of creating simple sugars from smaller molecules.
Simple sugars cannot be further hydrolyzed by the human body.
- It is only the process of photosynthesis that creates simple sugars from smaller molecules.
- The human cells are not capable of carrying out this process.
- During photosynthesis, green plants manufacture glucose, a simple sugar by combining carbon dioxide and water in the presence of sunlight.
- The product is usually glucose and evolution of oxygen.
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Answer: d
Explanation: The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.
Well, knowing that the molar mass of O2 is 32 g/mol. In 16 grams of pure O2, there is 0.5 mol of Oxygen - O2. In 48 grams there would be 0.5 • 3 which is 3/2 or 1.5 moles. 1.5 • (6.02 X 10^23) gives us the number of molecules in pure O2.
This would be 9.03 X 10 ^23 molecules.
