Module 2: Foundations Of Chemsitry And Biology Flashcards
Homeostasis Overview
- A relatively stable state of equilibrium
-Self-regulating process by which biological systems tend to maintain stability. Necessary for maintaining life, function, repair and HEALTH.
Go to page 7 of Notably to look at drawings
Negative Feedback Loop
NFL
Stimulus —> Sensor —> Control —> Effector
Body Temp. exceeds 37 degrees C —> Nerve cells in skin and brain —> Temp. Regulatory center in brain —> sweat glands throughout the body
Look at page 9 on notably
Positive Feedback Loop
PFL
- When the body amplifies a change in a variable is will increase or decrease to further the normal dynamic or homeostatic range
Example: Blood clotting and child birth
List the Levels of Organization
Atoms - Molecules/compounds - Organelles - Cells - Tissues - Organs - Organ systems - Organism
What are Atoms?
What are molecules?
- Smallest fundamental form of matter (hydrogen, oxygen, carbon, calcium, and phosphorus)
- When two or more atoms of the same type are chemically bonded together (O2) COMPOUNDS = two or more atoms of different types are chemically bonded (H2O)
What are Organelles?
What is Cellular?
- Sub-cellular structures that preform specific functions in the cell. (Nucleus, mitochondria, endoplasmic ret., ribosome, cell membrane)
- Most basic level of organization in the body, basic structural levels of living matter, capable of reproducing itself (Neurons, myocytes, epithelial cells)
Define tissue and the four main types of tissue.
- Group of cells organized together that perform a similar function.
Four types:
Neuronal tissue,
Muscular tissue,
Connective,
Epithelial
Define Organs, and Organ system.
- When two or more tissues work together to perform a specific function. Most organs contain all four tissues (heart, lung, small intestine)
-When two or more organs work together to preform a specific function (Respiratory, Urinary etc.)
Define Organism within the levels of organization.
Preforming all physiological functions
Differentiate Individual, population, and community.
Individual is the basic unit of ecological study, a population is a group of individuals of the same species living in a specific area, and a community comprises all the different populations that live together in a defined area.
Differentiate Ecology, Ecosystem, Biome, and Biosphere.
Ecology- Scientific discipline within biology that studies the relationships between living organisms and their interactions with their nature
Ecosystem- Community comprised of biological, physical, and chemical components, considered as a unit.
Biome - An area classified according to the species that live in that location
Biosphere - The region of earth that encompasses all living organisms: plants, animals and bacteria.
*Fluid compartment
Extracellular Fluid (ECF)
Fluid outside of the cell, fluid within the BV
*Fluid compartment
Intercellular fluid (ICF)
Fluid in the cell (surrounding cells)
If any body fluid such as Na+/K+/Cl- increases or decreases in the blood plasma it will then… What?
Increase or decrease within the interstitial fluid to match the blood plasma
EXAMPLE: Decrease in blood plasma will decrease interstitial fluid and effect the function (and fluid volume) of a cell (intracellular fluid)
Decrease in Ca2+ in blood plasma, decrease interstitial fluid = muscle spasms in skeletal muscle
ISF Composition (Plasma)
Na+ (sodium) *
Cl- (chloride) *. Increase Na+, Cl-, Ca2+
Ca+2 (calcium) *. Decrease K+, P
HCO3- (bicarbonate)
OUTSIDE OF BANANA