Yes water is a polar molecule
Answer : (1) The correct option is, (A) increases
(2) The correct option is, (C) Decreases
Explanation :
Gravitational force : It is defined as the gravitational force is directly proportional to the product of the masses of the two object and an inversely proportional to the square of the distance between the two object.
where,
F = gravitational force or gravity
M and m = mass of two object
r = distance between the two object
G = gravitational constant
When the mass of an object increases then the gravitational force or gravity is increases because gravitational force is directly proportional to the mass of an object.
When the distance between the two object increases then the gravitational force or gravity is decreases because gravitational force is inversely proportional to the distance between the two object.
Hence, (1) As mass increases, gravity increases. (2) As distance increases, gravity decreases.
Cells are so small so the surface area and volume of them can be proportional to each other. This helps with the efficiency of the cell's absorption and waste expulsion processes. Also by the cell's smallness, communication from the nucleus to other organelles is fast and the cell can be regulated while the conditions for diffusion are still ideal.Its because they need to be able to diffuse through materials easily. Also, materials inside and outside of the cell need to easily pass through the cell membrane, which makes it harder and slower for the materials to pass through the cell membrane.
Answer: Paracrine
Explanation:
Paracrine signaling is a form of cell signaling in which a cell produces a signal that induces changes in nearby cells, altering the behavior or differentiation of those cells. Molecules known as paracrine factors diffuse over relatively short distances (local action), unlike endocrine factors (hormones that travel considerable distances over the circulatory system), juxtacrine interactions, and autocrine signaling.
<u>Cells that produce paracrine factors secrete them into their immediate extracellular environment. </u>These factors then travel to nearby cells where the gradient of the factor received determines the outcome. However, the exact distance a paracrine factor can travel is not known with certainty. Paracrine signaling is a form of cell signaling in which a cell produces a signal that induces changes in nearby cells, altering the behavior or differentiation of those cells. <u>Molecules known as paracrine factors diffuse over relatively short distances</u>, unlike endocrine factors (hormones that travel considerable distances over the circulatory system), juxtacrine interactions, and autocrine signaling.
Cells that produce paracrine factors secrete them into their immediate extracellular environment. These factors then travel to nearby cells where the gradient of the factor received determines the outcome. However, the exact distance a paracrine factor can travel is not known with certainty.
In the case of infection, cells of the innate immune system secrete different cytokines into their immediate extracellular environment that attract other immune system cells such as neutrophils and lymphocytes, to fight the infection.
