Regulation Of The Internal Environment - SS3 Biology Past Questions and Answers - page 1
What is the primary purpose of homeostasis in unicellular organisms?
To maintain a stable internal environment
To support multicellular growth
To facilitate locomotion
Which organelle is responsible for regulating water balance in unicellular organisms?
Mitochondria
Contractile vacuole
Golgi apparatus
How do unicellular organisms respond to changes in external temperature?
By producing hormones
By sweating
By adjusting their metabolic rate
What is the primary function of the kidneys in homeostasis?
Synthesis of glucose
Regulation of blood pressure
Production of bile
Which organ plays a crucial role in maintaining the body's acid-base balance during homeostasis?
Kidneys
Liver
Skin
What is the main function of the liver in homeostasis?
Regulation of body temperature
Detoxification of harmful substances
Storage of excess glucose
During hot weather, how does the skin contribute to homeostasis?
By producing digestive enzymes
By synthesizing vitamin D
By releasing excess heat through sweating
Which hormone, produced by the kidneys, plays a key role in red blood cell production and oxygen transport?
Insulin
Insulin
Estrogen
Erythropoietin
What is the function of the kidneys in maintaining electrolyte balance during homeostasis?
Regulating calcium absorption
Controlling muscle contractions
Balancing water levels
How does the liver contribute to glucose homeostasis?
By storing excess glucose as glycogen
By releasing insulin to lower blood glucose levels
By facilitating gas exchange in the blood