Homeostasis Flashcards
What is homeostasis?
Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.
True or False: Homeostasis only refers to temperature regulation.
False
Fill in the blank: The primary organ involved in temperature regulation in humans is the _______.
hypothalamus
What is the term for the body’s mechanism to counteract changes in its internal environment?
Negative feedback
Which of the following is NOT a component of homeostasis: a) Sensors b) Effectors c) Catalysts?
c) Catalysts
Short answer: Name one example of a physiological process that demonstrates homeostasis.
Blood glucose regulation
True or False: Homeostasis is only important for animals, not plants.
False
What is the role of feedback loops in homeostasis?
Feedback loops help regulate physiological processes by signaling when to initiate or stop a response.
Fill in the blank: The process by which the body increases temperature in response to cold is known as _______.
thermoregulation
What does the term ‘set point’ refer to in the context of homeostasis?
The ideal value or range for a particular physiological variable.
Multiple choice: Which hormone is primarily involved in regulating blood glucose levels? a) Insulin b) Cortisol c) Adrenaline
a) Insulin
True or False: Homeostasis can be disrupted by external factors such as temperature changes.
True
What is an example of a positive feedback mechanism?
Childbirth, where oxytocin increases contractions.
Fill in the blank: The process of maintaining fluid balance in the body is known as _______.
osmoregulation
Which system is primarily responsible for regulating body temperature?
The integumentary system
True or False: Homeostasis only involves physical processes, not chemical.
False
What is the main function of the kidneys in homeostasis?
To regulate water and electrolyte balance.
Fill in the blank: The body’s response to high blood pressure includes _______ the heart rate.
decreasing
What is the role of the endocrine system in homeostasis?
It releases hormones that regulate various physiological processes.
Multiple choice: Which of the following is a key factor in thermoregulation? a) Sweating b) Shivering c) Both a and b
c) Both a and b
True or False: Homeostasis is a static process.
False
What is the significance of homeostasis for organisms?
It allows organisms to survive and function effectively in varying environments.
Fill in the blank: The balance of pH in the body is an example of _______ homeostasis.
chemical
Short answer: What can happen if homeostasis is not maintained?
It can lead to illness or death.
What role do sensors play in the homeostatic process?
Sensors detect changes in the internal environment.
Multiple choice: Which part of the brain is crucial for maintaining homeostasis? a) Cerebellum b) Hypothalamus c) Medulla oblongata
b) Hypothalamus
