DONE Homeostasis

Question 1

Homeostasis

Answer 1

Physiological process by which internal systems of body maintained at eqm despite variations in intrinsic and extrinsic factors on system

Question 2

‘Homeo’

Answer 2

Sameness

Question 3

‘Stasis’

Answer 3

Standing still

Question 4

Variable

Answer 4

Temperature, pH

Question 5

Sensor

Answer 5

Monitors current value of variable

Question 6

Control centre

Answer 6

Retains desired value of variable

Question 7

Effector

Answer 7

Change value of variable as determined by control centre

Question 8

Negative feedback

Answer 8

Effector opposes change, sensor/control centre inhibits further action by effector, stops when effector ceases

Question 9

Response when hot

Answer 9

Sweating, pilorelaxation, vasodilation, stretching out

Question 10

Response when cold

Answer 10

Shivering, piloerection, vasoconstriction, metabolism of white fat

Question 11

Positive feedback

Answer 11

Change in one direction, stops when variable ceases

Question 12

Positive feedback example

Answer 12

Coagulation, Ferguson reflex

Question 13

Normal range for temp.

Answer 13

37 +-0.5

Question 14

Temp in menstrual cycle + pregnancy

Answer 14

37.4

Question 15

Where is core body temp?

Answer 15

Thorax, abdomen, head, neck

Question 16

Hypothermia temp

Answer 16

Below 36.5

Question 17

Ph range

Answer 17

7.35-7.45

Question 18

Blood pH

Answer 18

7.4

Question 19

Arteries pH

Answer 19

7.45

Question 20

Vein pH

Answer 20

7.35

Question 21

Acidosis pH

Answer 21

Below 7.35

Question 22

Alkalosis/alkylosis pH

Answer 22

Above 7.45

Question 23

What are the 2 main organs that maintain acid-base balance?

Answer 23

Lungs and kidneys

Question 24

What is the volume of blood in a standard male (70kg)?

Answer 24

5 litres

Question 25

What is the total body water of a standard male?

Answer 25

42 litres

Question 26

What does hypotonic mean?

Answer 26

Less water outside cell as transported in

Question 27

What does hypertonic mean?

Answer 27

Less water inside cell as transported out

Question 28

What does isotonic mean?

Answer 28

Same amount of water both sides of plasma membrane

Question 29

What is greater in oedema, hydrostatic pressure or osmotic pressure?

Answer 29

Hydrostatic pressure