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Chapter 17 > Powerpoint 1 > Flashcards

Powerpoint 1 Flashcards

1
Q

What is feedback?

A

Relaying of information bout a given condition to the appropriate organ system

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2
Q

What is negative feedback?

A

Feedback to restore homeostasis. The reverse of the original signal

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3
Q

What is positive feedback?

A

When the stimuli is enhanced or continued

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4
Q

What are the beneficial positive feedbacks?

A

Labor
Blood clotting
Atrial natriuretic peptide/hormone ((heart overworked))

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5
Q

What are the two systems involved in feedback?

A

Nervous and endocrine

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6
Q

What does the nervous system do in feedback?

A

Transmits and receives impulses

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7
Q

What does the endocrine system do in feedback?

A

Secrets hormones

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8
Q

What are the four fluid compartments?

A

1) Intracellular fluid (icf)
2) extracellular fluid (ecf)
A- interstitial
B- intravascular
*transcellular

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9
Q

Where is intracellular fluid found?

A

Inside the cell

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10
Q

How much of icf is found?

A

60-65%

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11
Q

What are the functions of icf?

A

To stabilize agents for parts of the cell and to assist with transport of nutrients in and out of the plasma membrane

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12
Q

Where is extracellular fluid located?

A

Outside the cell

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13
Q

How much ecf is found?

A

35-40%

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14
Q

What are the types of ecf?

A

1) interstitial
2) intravascular
3) transcellular

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15
Q

Where is interstitial fluid found?

A

Tissue

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16
Q

Where is intravascular fluid found?

A

Plasma

17
Q

Ecf is the most…

A

Regulated body fluid

18
Q

What are the controlling organs that maintain ecf?

A

Brain, kidneys and pit glands

19
Q

What are the primary mechanisms regulating ecf?

A

Kidneys, adrenal cortex and hypothalamus

20
Q

What is the hypothalamus?

A

Thirst center

21
Q

What is adh and what does it do?

A

Antidiuretic hormone and its part of negative feedback mechanism respond to conditions in the cardiovascular system

22
Q

What is the RAA system?

A

The renin angiotensin aldosterone system

23
Q

What does RAA control?

A

Fluid volume and it causes higher blood pressure which causes aldosterone secretion. Also causes na reasorptuon and equals lower urine output

24
Q

What is anp/anh

A

Atrial natriuretic peptide or hormone

25
Q

What does anp/anh promote

A

Dieresis and equals higher urine output

26
Q

What is the normal intake per day?

A

2500 ml

27
Q

What does normal intake equal?

A

Normal output

28
Q

What is the normal output?

A

Urine, feces, perspiration and breathing

29
Q

What is over-hydration?

A

Excess of water in the body

30
Q

What is edema?

A

Excess accumulation of fluid in tissues

31
Q

What is third spacing?

A

Edema, fluid accumulated resulting from trauma, infection etc

32
Q

What is homeostasis?

A

Dynamic process to maintain a balance by adjusting to internal and external stimuli

Chapter 17 (5 decks)

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