Unit 1 - Molecules Flashcards
Homeostasis
Maintaining stable internal state in body
- Change (causes cells to react)
- Receptors (detect change
- Control center (receives info from receptor and sends commands to effector
- Effectors (physical change agents)
Ionic Bond and Polar Covalent
1 atom seemingly gives away electron to another atom (become postive when losing ion and negative when they gain)
have dipoles (slight positive and negative natures) like water - Unequal sharing
Hydrogen Bonds
- Weak
can form hydrogen bonds with up to four other molecules
The type of bond shown between the two water molecules is
Hydrogen Bonds
Example of negative feedback
The thermostat will shut off the furnace when a room temperature reaches a certain point
A solution with a pH of 2 is:
Strongly acidic
If the pH of a solution changes from 2 to 5, then the solution has
Lost Hydrogen ions
Negative feedback
Stimulus (stimulates) - Receptor (sends message to) - Regulatory center (Causes) - Adaptive response (results in) Normal conditions (end of circuit)
In living systems, excess hydroxide or hydrogen ions will be removed by a/an:
Buffer
Positive Feedback
Stimulus (stimulates) - Receptor (sends message to) - Regulatory center (causes) - Adaptive Response - Regulatory Center
Normal Condition not met
What type of bonds are found between hyrdrogen and oxygen atoms within single water molecule?
Colvalent
What type of bonds are form between two or more water molecule?
Hydrogen Bonds - 4 water molcules can hydrogen bond with a single water molecule
Monosaccharide VS Disaccharide VS Polysaccharide
- Sugar containing single ring (gluose and fructose)
- Sugar containing 2 bonded rings (Surcrose= glucose + fructose)
- Sugar containing many bonded rings (starch and Glycogen)
3 Disaccarides
Maltose(glucose+glucose), Sucrose(glucose+fructose), and Lactose(glucose+galactose)
