Lecture 4, Life Processes 4 Flashcards
What is diffusion/osmosis?
A form of passive transport directly across the membrane.
What is facilitated diffusion?
A form of passive transport through a membrane channel or transporter (water through an aquaporin).
What does primary active transport do?
Uses ATP to transport substances against their electrochemical gradient, creating an electrochemical gradient.
What does secondary active transport do?
Uses electrochemical gradients created by primary active transport. The movement of one substance down its gradient (downhill) drives the movement of another substance against its gradient (uphill).
True or false… bulk transport (flow) is a passive process in which all solutes and water move down a pressure gradient that requires pressure to be created?
True
What is homeostasis?
Maintaining a balanced internal environment (keeping a range of variables within a set range so that cells can function).
What is the primary fuel to make ATP?
Blood glucose
What is blood osmolarity?
The ratio of solutes to water
What does MABP stand for and what is it?
Mean arterial blood pressure is the average blood pressure within all the arteries.
What will occur if the temperature of the blood is too hot or cold?
Hot= Protein damage, Cold= Processes slow or stop
In what order does negative feedback control work?
Stimulus → Sensor → Control centre → Effector
What are 5 examples of variables the body tries to keep in balance?
Blood glucose, blood pH, blood osmolarity, blood pressure, and blood temperature.
