Chapter 2 & 3: Cells

Question 0

Functions of IF are…

Answer 0

1. ) Removes wastes
2. ) Delivers needed substances to cells not in direct contact with circulation
3. ) Helps keep the external environment stable (Homeostasis)

Question 1

What is IF?

Answer 1

IF is interstitial fluid. It is composed of mostly water but it also contains: white blood cells, electrolytes, few large protein molecules, and dissolved nutrients, hormones, gases, and wastes.

Question 2

How is IF released and returned to general circulation?

Answer 2

Fluid is forced out of capillaries because pressure INSIDE circulation is HIGHER than outside.

Most IF is returned to circulatory system at capillaries since pressure is now HIGHER OUTSIDE than inside.
Small amount of IF and protein are returned to circulation with help of the Lymphatic System.

Question 3

What is homeostasis?

Answer 3

Processes that you body uses to maintain stable internal conditions despite changing external conditions

Question 4

Define physiological stress. W

Answer 4

Stress on your body that affects your processes of homeostasis.

Question 5

Function of the cell membrane are…

Answer 5

1. ) Hold cell together
2. ) Control what enters and leaves the cell (selectively permeable)
3. ) Signal transduction (reception of and response to oncoming messages)

Question 6

Define and explain cell differentiation.

Answer 6

All cells start out the same but they develop unique structures and functions as genes are developed.

Question 7

What cells are unique in respect to cell differentiation? Why?

Answer 7

Stem cells retain the ability of differentiate into adulthood, they don’t change.