Biology Flashcards
3 Ways to lose water from our body (organs)
- Skin (Sweat)
- Kidney (Urine)
- Lungs (Respiration/Breathing)
3 main minerals in body
Calcium, Iron, Phosphorus
What is homeostasis?
List what it does.
Homeostasis keeps the internal body environment constant.
pH level = 7.35
0.1% blood sugar
37°C
What are neurons and what do they do?
Bundles of nerves.
Send electrical impulses.
What are synapses and what do they do?
Connect neurons.
Send chemical signals.
What does the central nervous system (CNS) do and what does it consist of?
It analyzes information coming through our senses and consists of the Spinal chord and brain.
What does the Peripheral nervous system do?
It carries information to the CNS via nerves.
What are the 2 nerves in the PNS and what do they do?
- Sensory nerves. They carry information to the CNS.
- Motor nerves carry information from the brain straight to organs & muscles. They are responsible for reflexes (involuntary reaction to stimuli)
What does the Atonomic Nervous system do? (Vegetative NS/Autonomous NS)
It controls all involuntary activities (blinking, heart rate, etc). It is responsible for maintaining homeostasis.
Also responsible for the General adaption syndrome = fight or flight.
Boyle’s Law
Volume is inversely proportional to pressure (at constant temperature)
PV=k
Charle’s Law
Volume is proportional to temperature (at constant pressure).
V/T=k
Gay-Lussac’s Law
Temperature is proportional to pressure (at constant volume)
P/T=k
Dalton’s Law
Law of partial pressure
P(total)=P1+P2+P3
Sum of all pressures = total pressure
Henry’s Law
Amount of gas dissolved within a liquid is proportional to the amount of pressure applied to it.
Fick’s Law
Law of diffusion.
Gas goes from an area of high pressure to an area of low pressure.
e.g. Gases diffuse in lungs&blood.
