Exocytosis vs. Endocytosis Quiz

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What is the term for the phase when water moves from the environment to the cytoplasm and to the contractile vacuole?

Osmoregulation

Diastole (correct)

Exocytosis

Systole

Which organelle is involved in excretion and osmoregulation in Paramecium caudatum?

Mitochondria

Contractile vacuole (correct)

Nucleus

Endoplasmic reticulum

What does systole refer to in relation to the contractile vacuole?

Water moves out of the vacuole (correct)

Osmotic pressure increases in the vacuole

Water moves into the vacuole

Nutrients are stored in the vacuole

In the context of water expulsion, what is the function of exocytosis?

Expulsion of substances from the cell Signup and view all the answers

Which term specifically relates to the regulation of water balance in a cell?

Osmoregulation Signup and view all the answers

What does the contractile vacuole do in regards to excess water in Euglenas?

Contracts to expel excess water Signup and view all the answers

What is the primary function of excretion in organisms?

Eliminating waste products of osmoregulatory processes Signup and view all the answers

Which of the following substances is an example of a nitrogenous waste?

Uric acid Signup and view all the answers

What happens to the nitrogen-containing amino group during catabolism?

It is removed by enzymes and converted to ammonia Signup and view all the answers

Which process is responsible for removing water and nitrogenous wastes from organisms?

Excretion Signup and view all the answers

Where are nitrogenous wastes like ammonia, urea, and uric acid primarily removed from in animals?

By excretory organs Signup and view all the answers

Which process do some aquatic organisms use to excrete highly toxic ammonia before it reaches dangerous concentrations?

Exocytosis Signup and view all the answers

What is the primary function of a contractile vacuole?

Excreting toxic wastes Signup and view all the answers

How does a contractile vacuole help organisms in hypertonic environments?

By adjusting the cytoplasm to be more hypertonic than the outside environment Signup and view all the answers

What process do amoebas utilize to expel toxic wastes and excess water?

Exocytosis Signup and view all the answers

What does exocytosis involve?

Releasing substances from a cell through fusion with the cell membrane Signup and view all the answers

In paramecium, what happens when the canals around the contractile vacuole fill with water?

The vacuole expels the water through a pore in the cytoplasm Signup and view all the answers

How does exocytosis differ from endocytosis?

Exocytosis expels substances out, while endocytosis brings substances in. Signup and view all the answers