Midterm 3

Question 1

What is homeostasis?

Answer 1

Tendency for environment to remain constant

Question 2

What factors affect homeostasis?

Answer 2

Warmth, water, food

Question 3

What type of feedback characterizes homeostatic systems?

Can you describe what it means?

Answer 3

Negative feedback

asdf

Question 4

What is the difference between ectothermy and endothermy?

Answer 4

asdf

Question 5

Where are our internal thermostats located?

Answer 5

Spinal cord, midbrain/brainstem, hypothalamus

Question 6

Within the hypothalamus, what area controls autonomic responses to changing temperature?

Answer 6

PDA controls response to changing temperature

Question 7

Within the hypothalamus, what area controls behavioral response to changing temperature?

Answer 7

Lateral hypothalamus controls behavioral response

Question 8

What word do we use to describe a solution that has the same level of salt content as our extracellular compartment? Higher salt concentration? Lower salt concentration?

Answer 8

Isotonic: same salt concentration
Hypertonic: higher salt concentration
Hypotonic: lower salt concentration

Question 9

What type of thirst is triggered by low extracellular volume and what type of receptors detect it?

Answer 9

Hypovolemic thirst

detected by baroreceptors