homeostasis Flashcards
(26 cards)
What is homeostasis?
The maintenance of a stable internal environment in an organism.
True or False: Homeostasis only involves temperature regulation.
False
Fill in the blank: The human body maintains a temperature of approximately ___ degrees Celsius.
37
Which organ is primarily responsible for thermoregulation?
The hypothalamus
What is the role of negative feedback in homeostasis?
To counteract changes from a set point to maintain stability.
Multiple choice: Which of the following is NOT a factor regulated by homeostasis? A) Temperature B) Blood glucose levels C) Hair color
C) Hair color
What is the function of insulin in blood glucose regulation?
To lower blood glucose levels.
True or False: The pancreas plays a key role in blood glucose homeostasis.
True
What is the function of glucagon?
To raise blood glucose levels.
Fill in the blank: The process of maintaining water balance in the body is known as ___ regulation.
osmoregulation
What hormone is involved in regulating water balance?
Antidiuretic hormone (ADH)
Multiple choice: Which part of the brain controls hunger and thirst? A) Cerebrum B) Hypothalamus C) Medulla
B) Hypothalamus
True or False: The kidneys are involved in the excretion of waste products to maintain homeostasis.
True
What is the term for the process by which the body increases heat production?
Thermogenesis
Fill in the blank: The ___ system is responsible for the transport of hormones in the body.
endocrine
What is the primary role of the adrenal glands in response to stress?
To release adrenaline (epinephrine).
Multiple choice: What is the effect of adrenaline on heart rate? A) Decreases B) Increases C) No effect
B) Increases
True or False: Feedback mechanisms can be both positive and negative.
True
What is the main purpose of the fight or flight response?
To prepare the body to respond to a perceived threat.
Fill in the blank: The ___ gland regulates metabolism and energy levels.
thyroid
What is the role of the hypothalamus in temperature control?
It detects changes in body temperature and initiates appropriate responses.
Multiple choice: Which hormone increases metabolism? A) Insulin B) Thyroxine C) Glucagon
B) Thyroxine
True or False: The body can tolerate large fluctuations in blood pH.
False
What is the main function of the integumentary system in thermoregulation?
To provide insulation and facilitate heat loss through sweating.
