Homeostatic Control of the Internal Environment (Grade 12 NSC Matric Life Sciences): Flashcards
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Internal environment
Internal environment
Tissue fluid surrounding all cells in the body
Homeostasis
Homeostasis
Control process maintaining stable internal conditions
Six factors controlled by homeostasis
Six factors controlled by homeostasis
Water, salts, glucose, CO₂, thyroxin, temperature
ADH full name
ADH full name
Antidiuretic hormone
Osmoregulation
Osmoregulation
Water balance control in the body
Negative feedback system
Negative feedback system
Response opposes the original change
Water levels decrease, ADH response
Water levels decrease, ADH response
More ADH secreted, more water reabsorbed
Water levels increase, ADH response
Water levels increase, ADH response
Less ADH secreted, less water reabsorbed
Pituitary gland role in osmoregulation
Pituitary gland role in osmoregulation
Control centre that releases ADH
High temperature effect on enzymes
High temperature effect on enzymes
Enzymes become denatured (permanently damaged)