Lecture 1

Question 1

Define homeostasis

Answer 1

Maintenance of a relatively stable internal environment

Question 2

What are the 10 organ systems

Answer 2

Integumentary, circulatory, respiratory, musculo-skeletal, endocrine, nervous, immune, digestive, renal/urinary, reproductive

Question 3

What is the purpose of homeostasis?

Answer 3

maintain variables within tight range of set point

Question 4

How is homeostasis maintained?

Answer 4

Negative feedback loops (glucose levels, blood pressure)

Question 5

What is the difference between negative and positive feedback loops?

Answer 5

Negative = reduce initial stimulus, decreases difference between set point and value
Positive = enhance initial stimulus, increases difference between set point and value (ex. birthing)

Question 6

What is feedforward control?

Answer 6

Initiation of a response in anticipation of stimulus, feedback loops are after stimulus occurs