Module 1

Question 1

Homeostasis

Answer 1

The ability to keep stable internal environment as external conditions change through negative feedback pathways.

Question 2

Interstitial Space

Answer 2

Water between the cells

Question 3

Intracellular Fluid

Answer 3

Water inside the cells

Question 4

Extracellular Fluid

Answer 4

Water outside of the cells. (Ex: plasma)

Question 5

Negative Feedback

Answer 5

A way to maintain homeostasis, a very common process in the body. The response of a negative feedback system opposes the stimulus.

Question 6

Positive Feedback

Answer 6

Does not maintain homeostasis. It emphasizes the stimulus and leads to rapid changes. A less common mechanism.

Question 7

What are the terms used to describe negative feedback?

Answer 7

1. Stimulus
2. Sensor
3. Integrating Center
4. Effector
5. Response

Question 8

Mass Balance

Answer 8

The body wants to balance what comes into the body and what comes out. Equal input = output means the body is in balance. This helps maintain water and solute content.

Question 9

What does homeostasis act on?

Answer 9

Extracellular fluid to maintain the correct amount of fluid inside and outside of the cells which helps them function properly.

Question 10

What are some types of negative feedback loops?

Answer 10

1. Maintain body temperature
2. Maintain blood pressure
3. Changes in HR during exercise

Question 11

What are some types of positive feedback loops?

Answer 11

1. Ovulation
2. Giving Birth

Question 12

What does it mean for something to be inside the body? (internal?)

Answer 12

If something is inside the body then it has been absorbed. Must cross a barrier! Homeostasis maintains the internal environment.

Question 13

Total Body Water

Answer 13

All the water that is inside the body including intracellular water and extracellular fluid (interstitial fluid, plasma).