B7: Homeostasis Flashcards
(26 cards)
What is homeostasis?
The process by which living organisms regulate their internal environment to maintain stable, constant conditions.
True or False: Homeostasis only involves temperature regulation.
False
What are the main components of the homeostatic system?
Receptors, control center, and effectors.
Fill in the blank: The human body maintains a normal temperature around ____ degrees Celsius.
37
What role do receptors play in homeostasis?
They detect changes in the internal or external environment.
What is the function of the control center in homeostasis?
To process information from receptors and determine the appropriate response.
Multiple Choice: Which of the following is NOT a type of effector in homeostasis? A) Muscles B) Glands C) Neurons D) Lungs
D) Lungs
What is negative feedback?
A mechanism that reverses a change to bring the system back to its set point.
True or False: Positive feedback loops enhance or amplify changes in a system.
True
What is the role of the hypothalamus in thermoregulation?
It acts as the control center for regulating body temperature.
Fill in the blank: The hormone ____ is released by the pancreas to lower blood glucose levels.
insulin
What is the primary function of the kidneys in homeostasis?
To regulate water and electrolyte balance.
Multiple Choice: Which hormone increases blood glucose levels? A) Insulin B) Glucagon C) Adrenaline D) Thyroxine
B) Glucagon
What is osmoregulation?
The process of regulating water and solute concentrations in the body.
True or False: Sweating is a mechanism for cooling the body.
True
What is the main purpose of the feedback loop in homeostasis?
To maintain equilibrium within the body.
Fill in the blank: The ____ system helps to regulate blood pressure.
cardiovascular
What is the effect of adrenaline on the body?
It prepares the body for ‘fight or flight’ by increasing heart rate and energy availability.
Multiple Choice: Which part of the brain is responsible for regulating thirst? A) Cerebellum B) Medulla C) Hypothalamus D) Hippocampus
C) Hypothalamus
What happens to blood vessels during thermoregulation in a hot environment?
They dilate to increase blood flow to the skin and promote heat loss.
True or False: Homeostasis is only important for humans.
False
What is the role of the liver in regulating blood glucose levels?
It stores glucose as glycogen and releases it when needed.
Fill in the blank: The ____ feedback mechanism is used during childbirth.
positive
What is thermoregulation?
The process of maintaining an optimal temperature in the body.
