Homeostasis - AnP12

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Homeostasis

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20 Terms

1

Homeostasis

process by which organisms maintain a relatively stable internal environment

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2

Dynamic Equilibrium

homeostatic levels are NOT ALWAYS constant, but can fluctuate and then are brought back within a normal range.

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3

endocrine system

The body system that involving glands that secrete hormones to regulate body processes such as growth, reproduction, and metabolism.

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4

Thermoregulation

Process of maintaining an internal temperature within a tolerable range. Homestatic body temp is 37 degrees

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5

Negative feedback control

the body counteracts a stimulus to try to bring the body back within a normal range

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6

Positive feedback control

a stimulus causes a change and then the body reacts to ampify this change, a reaction in intensified (ex: childbirth)

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7

Stimulus

a signal to which an organism responds

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8

nervous system

the body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous systems

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9

pH of the blood

Homestatic pH level in the blood should be 7.4

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10

Blood Gluose Regulation

insulin (a hormone) and negative feedback

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11

Urine formation in homeostasis

Urine formation helps regulate blood volume, salt balance and pH

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12

Pancreas in homeostasis

Detects blood glucose levels to release insulin when needed or stimulate formation of glycogen by the liver

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13

Gycogen

is the storage form of glucose, when blood glucose levels are high the liver stores glycogen

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14

Role of respiratory system in homeostasis

Regulates blood pH by removing CO2 which prevents acidosis

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15

Blood Pressure

120/80 mm Hg

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16

Blood Sugar

70-100 mg/dL glucose

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17

Effector

an organ or cell that acts in response to a stimulus.

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18

Control Centre of the body

The brain

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19

vasoconstriction

blood vessels get more narrow to prevent the loss of heat (to maintain homeostasis)

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20

vasodilation

widening of blood vessels, allows more blood flow & can be useful to transport heat away from the core (to maintain homeostasis)

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