Water molecules ,some ions ,non polar compounds and glucose can pass through a cell membrane
Answer:
D. sodium, nitrogen, oxygen
Explanation:
Let's break up NaNO3 into its separate chemical symbols:
Na, N, O
Na is the symbol for sodium
N is the symbol for nitrogen
O is the symbol oxygen
Secretion is the process in urinary system that leads to the elimination of excessive substances like sodium and potassium in the urine.
Secretion is the process of transfer of waste substances from the blood capillaries into the renal tubule. The waste substances can be ions like sodium, potassium, or hydrogen. The segment of the renal tubule that performs secretion is the proximal convoluted tubule.
Urinary system is also called the excretion system where all the waste ions, minerals and water is transferred out from the body in the form of urine. Kidneys are the key organs of the urinary system. They filter out the impurities from the blood and excrete it out through the urethra by a process called micturition.
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Diffusion is the net movement of fluid from area of higher concentration to lower concentration, resulting from the random movement.
From example, if you drop a red ink in a cup of water, the ink will slowly spread among the water, making the water red. This is because the red ink is very concentrated, so it moves to the other part of water to lower the ink concentration. When it reaches the point where whole cup of water is red, it reached equilibrium and there's no more net movement
The digestive tract overlaps in many layers (It can even reach microsocpic overlaping) allowing it to fit inside a person's body.
