Lecture 10/homeostasis

1 2 3 4 5 6 7 8

Review:
(1) pp.790-791. Self-quiz 3, 6 - 10, and Challenge Question.
(2) Red blood cells pick up oxygen as they travel through the capillaries of the lungs and
release it as they pass through capillaries in other organs. Why are numerous small cells
better suited to this task than a few large ones with the same total volume? (3) diagram cells, tissues and organs that make up circulatory system. (4)Are the following examples of positiveor negativefeed back?

Stimulus

Increase in glucose

Increased CO2 in blood

Decreased O2 (chronic)

Stimulate nerve

Response

secretion of insulin

rapid breathing

increase in RBCs

Na+ leaks into cells

Result

Decrease in glucose

Decrease in CO2 level

increase in O2 levels

Influx of Na+

1.

2.

3.

4.


Review: (1) pp.790-791. Self-quiz 3, 6 - 10, and Challenge Question. (2) Red blood cells pick up oxygen as they travel through the capillaries of the lungs and release it as they pass through capillaries in other organs. Why are numerous small cells better suited to this task than a few large ones with the same total volume? (3) diagram cells, tissues and organs that make up circulatory system. (4)Are the following examples of positiveor negativefeed back?
	Stimulus Increase in glucose Increased CO2 in blood Decreased O2 (chronic) Stimulate nerve	Response secretion of insulin rapid breathing increase in RBCs Na+ leaks into cells	Result Decrease in glucose Decrease in CO2 level increase in O2 levels Influx of Na+
1. 2. 3. 4.