Chapter 2 Flashcards

1
Q

What is the definition of homeostasis?

A

condition or maintenance of bodily function where there is relatively constant or unchanging internal environment; at rest and unstressed

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2
Q

What is a good example of dynamic nature of homeostasis?

A

variability in blood pressure

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3
Q

What is steady state exercise?

A

an EXERCISE CONDITION where certain body functions have attained dynamic constancy at a new level

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4
Q

What are good examples of steady state?

A

changes in heart rate and oxygen consumption, ventilation, sweating, and body temperature

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5
Q

What helps maintain homeostasis?

A

biological control system

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6
Q

What are the components of a biological control system

A

receptor, integrating control center, and effector mechanism

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7
Q

what is negative feedback?

A

response caused by the effector mechanism works in opposition to the initial stimulus

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8
Q

Nonbiological negative feedback system?

A

thermostat

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9
Q

Biological Control Systems

A
Thermoregulation
Regulation of Blood Pressure
Regulation of Blood Glucose
Cellular Stress Response
Fluid Balance
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10
Q

Study the charts Homeostatic Control/Regulation of Blood Pressure/Regulation of Blood Glucose

A

..

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11
Q

Explain intracellular signaling

A

a chemical messenger is produced inside a cell and triggers pathways within the same cell for a specific response

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12
Q

Explain Juxtacrine Signaling

A

cell communicates by cell to cell contact through small junctions that connect between their cytoplasms

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13
Q

Explain Autocrine Signaling

A

a cell produces and releases a chemical messenger into the extracellular fluid that acts upon the cell produces the signal

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14
Q

Explain Paracrine Signaling

A

cell signal acts locally on nearby cells

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15
Q

Explain Endocrine Signaling

A

cells release hormones into the blood and they are carried throughout the body

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16
Q

look at stress protein chart

A

..

17
Q

What does positive feedback do?

A

increases the original signal which further stimulates a biological response

18
Q

Example of positive feedback

A

child birth; know that church

19
Q

What is gain?

A

the precision with which a control system maintains homeostasis

20
Q

Impaired Body Functions

A
Hypothermia
Hyponatremia 
Hypertension
Heart Failure
Diabettes