Answer:
maybe its are technology??
Answer:
(C) tarsal glands: produce tears
Explanation:
Tarsal glands are also called as Meibomian glands. These glands do not secrete tears. The tarsal glands sere to produce a fluid which in turn do not allow the eyelids to adhere to each other. Hence, tarsal glands are involved in preventing the eyelids from sticking to each other. Production of tears is the function of lacrimal glands.
Endocytosis is the process by which cells internalize substances from their external environment. It is how cells get the nutrients they need to grow and develop. Substances internalized by endocytosis include fluids, electrolytes, proteins, and other macromolecules. Endocytosis is also one of the means by which white blood cells of the immune system capture and destroy potential pathogens including bacteria and protists. The process of endocytosis can be summarized in three basic steps.
The Basic Steps of Endocytosis
The plasma membrane folds inward (invaginates) forming a cavity that fills with extracellular fluid, dissolved molecules, food particles, foreign matter, pathogens, or other substances.
The plasma membrane folds back on itself until the ends of the in-folded membrane meet. This traps the fluid inside the vesicle. In some cells, long channels also form extending from the membrane deep into the cytoplasm.
The vesicle is pinched off from the membrane as the ends of the in-folded membrane fuse together. The internalized vesicle is then processed by the cell.
There are three primary types of endocytosis: phagocytosis, pinocytosis, and receptor-mediated endocytosis. Phagocytosis is also called "cell eating" and involves the intake of solid material or food particles. Pinocytosis, also called "cell drinking", involves the intake of molecules dissolved in fluid. Receptor-mediated endocytosis involves the intake of molecules based upon their interaction with receptors on a cell's surface.
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The pH scale is a measurement system that indicates the concentration of HYDROGEN IONS in a solution.
The pH scale ranges from zero to 14. A pH that is less than 7 is considered to be acidic while a pH that is more than 7 is considered to be basic. pH 7 is considered to be neutral. The pH of a substance is dependent on the number of hydrogen ions that are present in the substance.
Nationalism means the belief of groups of people who are bound by cultural, territorial and ethnic. The answer is A. Centripetal forces. These are forces in a state promoting stability, unity and giving the strength thus binding a state together such as having strong national culture.
