Exam 1 Flashcards
What is homeostasis?
Stability (condition of being stable in the body)
If an animal’s internal body temperature is too high, how will the body respond?
Sweating
Define the term “Negative Feedback Loop”
Process that opposes changes that are outside normal range
Explain how negative feedback loops work inside the body.
- Receptors detect changes and send signal to brain
- Brain interprets signal and sends a response
- Target cell receive the signal and try to fix the problem
List 4 factors that are regulated inside the body
- Temperature
- Blood pressure
- Blood glucose levels
- Blood pH
What is a membrane?
A barrier that regulates movement of things inside and outside a cell
What is the main component of a cell membrane?
Lipid
Does diffusion require energy?
No
What is meant by the term “concentration gradient?”
Imbalance of things across the membrane
Which method of cell membrane transport requires energy?
Active Transport
Which method of transport involves easy movement across the lipid membrane?
Simple diffusion
Which method of transport involves the use of protein tunnels and DOES NOT require energy?
Facilitated diffusion
Name the important molecule that contains energy in its phosphate bonds.
ATP
What does the Sodium-Potassium Pump do?
- Moves 3 sodium outside cell
- Moves 2 potassium inside cell
Name 2 body systems that commonly use the Sodium-Potassium Pump.
- Nervous System
- Digestive System
