All about Homeostasis GCSE Higher level Flashcards
What is homeostasis?
Homeostasis is the process by which living organisms regulate their internal environment to maintain a stable, constant condition.
True or False: Homeostasis only involves temperature regulation.
False
Fill in the blank: Homeostasis maintains the balance of _____ in the body.
internal conditions
What are the main components of a homeostatic system?
The main components are receptors, effectors, and a control center.
Which organ is primarily responsible for thermoregulation in humans?
The hypothalamus
What role do receptors play in homeostasis?
Receptors detect changes in the internal environment and send signals to the control center.
Multiple choice: Which of the following is NOT a factor maintained by homeostasis? A) Temperature B) Blood glucose levels C) Hair color
C) Hair color
Short answer: What is the physiological response when body temperature rises?
Sweating and increased blood flow to the skin.
What is negative feedback in homeostasis?
Negative feedback is a process that counteracts a change in a controlled condition to bring it back to set point.
True or False: Positive feedback is more common than negative feedback in homeostasis.
False
Fill in the blank: The _____ system helps in regulating blood sugar levels.
endocrine
What hormone lowers blood glucose levels?
Insulin
Multiple choice: Which organ is responsible for excreting excess water? A) Heart B) Kidneys C) Lungs
B) Kidneys
Short answer: What is the role of the pancreas in homeostasis?
The pancreas regulates blood sugar levels by secreting insulin and glucagon.
What happens during dehydration?
The body conserves water, leading to increased thirst and reduced urine output.
True or False: Homeostasis can be affected by external environmental changes.
True
Fill in the blank: The _____ system helps to regulate body temperature through sweating.
integumentary
What is the set point in a homeostatic system?
The ideal value or range that the system aims to maintain.
Multiple choice: Which of the following is an example of homeostasis? A) Breathing B) Digesting food C) Regulating body temperature
C) Regulating body temperature
Short answer: What effect does exercise have on homeostasis?
Exercise increases body temperature and requires adjustments in heart rate and sweat production.
What is the primary function of the hypothalamus in homeostasis?
To act as the control center for regulating body temperature and other homeostatic processes.
True or False: Homeostasis is a static process.
False
Fill in the blank: The process of _____ helps to cool the body when it overheats.
evaporation
What is the role of the kidneys in the homeostatic regulation of water?
The kidneys filter blood and either excrete or retain water to maintain fluid balance.
Multiple choice: Which hormone increases blood glucose levels? A) Insulin B) Glucagon C) Cortisol
B) Glucagon
Short answer: How does the body respond to a drop in temperature?
The body shivers to generate heat and blood vessels constrict to conserve warmth.
