Homeostasis Flashcards Preview

Biology S4 Revision 2017 > Homeostasis > Flashcards

Flashcards in Homeostasis Deck (14):
1

Define homeostasis?

Homeostasis is keeping a constant internal environment.

2

What is the human body temperature?

The human body temperature is 37° c.

3

Explain why homeo means?

Homeo means the same.

4

Define stasis?

Stasis means balance.

5

What are the four things that the body regulates?

The four things that the body regulates are:

1). Water Levels

2). Ions

3). Temperature

4). Glucose

5). Waste

6

What does the pancreas do?

The pancreas monitors and controls glucose levels in the blood.

7

What are the four functions of the kidney's?

The four functions of the kidney's are:

1). Regulation of water levels in the blood

2). Reabsorption of useful substances into the blood

3). Adjustment of the levels of salts and ions in the blood

4) Excretion of urea and other metabolic wastes.

8

What does dialysis fluid contain?

Dialysis fluid contains:

- a glucose concentration similar to a normal level in the blood

- A concentration of ions similar to that found in normal blood plasma

- no urea

9

What are the advantages of having a dialysis?

The good things about having a dialysis are:

1). Saves lives

2). Removes urea from the blood

3). No overall change in glucose

4) Corrects an imbalance in ions

10

What are the disadvantages of having a dialysis?

The disadvantages of having a dialysis are:

1). It is highly specialised and expensive equipment

2).The patient needs to be connected 2-3 times per week.

3). It takes 4-6 hours per session.

11

What are the good things about having a kidney transplant?

The good things about having a kidney transplant are:

1). It does not require regular dialysis

2). It increases life expectancy

3). There are fewer diet restrictions.

4). You may feel healthier.

12

What are the bad things about having a kidney transplant?

The bad things about having a kidney transplant are:

1). You need to have major surgery.

2). You have to wait for a donor

3). Your body may reject the kidney

4). You have to take immunosuppressant drugs for the rest of your life.

13

What are the four reflexes?

The four reflexes are:

1). Hear

2) Touch

3). Sight

4). Taste

14

Explain how a pregnancy strip works to show a positive result.

A pregnancy strip works to show a positive result by this scientific answer:

1). The urine passes through the reaction zone.

2). The HCG hormone binds to the mobile HCG antibody (in the reaction zone)

3). The HCG hormone binds to the immobilised HCG antibodies in the results zone

4). The other antibodies do not attach to HCG.

5). They bind to antibodies in the control zone.

6). Blue dye appears in both the control and results zones (to show a positive result).