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Body Logistics > DONE Homeostasis > Flashcards

DONE Homeostasis Flashcards

1
Q

Homeostasis

A

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

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2
Q

‘Homeo’

A

Sameness

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3
Q

‘Stasis’

A

Standing still

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4
Q

Variable

A

Temperature, pH

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5
Q

Sensor

A

Monitors current value of variable

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6
Q

Control centre

A

Retains desired value of variable

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7
Q

Effector

A

Change value of variable as determined by control centre

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8
Q

Negative feedback

A

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

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9
Q

Response when hot

A

Sweating, pilorelaxation, vasodilation, stretching out

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10
Q

Response when cold

A

Shivering, piloerection, vasoconstriction, metabolism of white fat

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11
Q

Positive feedback

A

Change in one direction, stops when variable ceases

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12
Q

Positive feedback example

A

Coagulation, Ferguson reflex

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13
Q

Normal range for temp.

A

37 +-0.5

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14
Q

Temp in menstrual cycle + pregnancy

A

37.4

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15
Q

Where is core body temp?

A

Thorax, abdomen, head, neck

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16
Q

Hypothermia temp

A

Below 36.5

17
Q

Ph range

A

7.35-7.45

18
Q

Blood pH

A

7.4

19
Q

Arteries pH

A

7.45

20
Q

Vein pH

A

7.35

21
Q

Acidosis pH

A

Below 7.35

22
Q

Alkalosis/alkylosis pH

A

Above 7.45

23
Q

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

A

Lungs and kidneys

24
Q

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

A

5 litres

25
Q

What is the total body water of a standard male?

A

42 litres

26
Q

What does hypotonic mean?

A

Less water outside cell as transported in

27
Q

What does hypertonic mean?

A

Less water inside cell as transported out

28
Q

What does isotonic mean?

A

Same amount of water both sides of plasma membrane

29
Q

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

A

Hydrostatic pressure

Body Logistics (14 decks)

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