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bio204.s1.d16
cava bio 204 s1.d16 2.05 Ions in Living Things
Question | Answer |
---|---|
An [...] is an atom with a positive or a negative electrical charge | An ion is an atom with a positive or a negative electrical charge |
Cells use [...] to send electrical signals to each other. | Cells use ions to send electrical signals to each other. |
When you ingest sodium chloride, you are ingesting an inorganic compound —it does not contain carbon. You are also ingesting an [-ic] compound. | When you ingest sodium chloride, you are ingesting an inorganic compound —it does not contain carbon. You are also ingesting an ionic compound. |
One of calcium's most important roles is to help regulate the substances that cross cell [-s]. | One of calcium's most important roles is to help regulate the substances that cross cell membranes. |
When [...] dissolves in water (or blood), it forms an acid called carbonic acid. | When carbon dioxide dissolves in water (or blood), it forms an acid called carbonic acid. |
Bicarbonate ions serve as [-s] that keep the acidity at levels that cells can tolerate. | Bicarbonate ions serve as buffers that keep the acidity at levels that cells can tolerate. |
[-s] are chemicals that resist a change in pH; either to more acidic, or more alkaline. | Buffers are chemicals that resist a change in pH; either to more acidic, or more alkaline. |
The most familiar source of bicarbonate ions is probably sodium bicarbonate (aka [...]) | The most familiar source of bicarbonate ions is probably sodium bicarbonate (aka baking soda) |
[...] ions (Na+) play an important role in balancing the movement of fluids into and out of cells. | Sodium ions (Na+) play an important role in balancing the movement of fluids into and out of cells. |
In lesson 2.05, the k12 authors say, "Hold your arms out like a bird and flap them up and down. Don't worry, no one can see you! ".... how do they know no one can see you!? ARE THEY WATCHING YOU!??? ;-) | YES!! |
The ruby-throated hummingbird can flap its wings approximately 65 times per [...]. | The ruby-throated hummingbird can flap its wings approximately 65 times per second. |
In general, the larger an animal is, the [-er] it's heart beats and the smaller it is, the [-er]. | In general, the larger an animal is, the slower it's heart beats and the smaller it is, the faster. |
-ide is a suffix we use in chemistry for [-ive] ions. Chlorine is an element, but Chlor-IDE is the [-ive] ion of Chlorine. | -ide is a suffix we use in chemistry for negative ions. Chlorine is an element, but Chlor-IDE is the negative ion of Chlorine. |
Hydrogen [-s] play a large role in generating ATP, the 'battery' molecule that powers all the protein machines in cells. | Hydrogen ions play a large role in generating ATP, the 'battery' molecule that powers all the protein machines in cells. |