Contractile vacuoles maintain water balance by pumping excess water out of some single-called pond organisms . in multi-cellular humans , the kidney is chiefly involved in maintaining water balance . a: interference with nerve signals disrupts cellular communication and homeostasis withing organisms b: a disruption in a body system may disrupt the homeostasis of a single - celled organism c: structures found in single- celled organism can act in a manner similar to tissue and organs in multi-cellular organisms d: tissues , organs, organ systems work together to maintain homeostasis in all living things  i need with a quiz and i have 20 more questions if you will be willing to with it send me your email and i will send all the questions to you 

C: structures found in single- celled organism can act in a manner similar to tissue and organs in multi-cellular organisms

Explanation:

The question above shows a certain similarity in the function of structures of unicellular and multicellular organisms. As we can see, vacuoles are indispensable in balancing water within single-celled organisms. This function is similar to the function of the kidneys, in multicellular organisms, which is also responsible for the balance of water.

In addition, the function of the kidneys is, among others, to filter the blood to eliminate substances harmful to the body, such as ammonia, urea and uric acid. They also work to secrete substances important to our health. The kidneys receive blood from the renal arteries, branches of the aorta that come directly from the heart.

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cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!