B5 - Homeostatis And Response Flashcards
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: Homeostasis involves the regulation of __________, pH, and ion concentrations.
temperature
What is the role of the hypothalamus in homeostasis?
It acts as the control center for temperature regulation and other homeostatic processes.
Which organ is primarily responsible for regulating blood glucose levels?
The pancreas
Multiple Choice: Which hormone lowers blood glucose levels? A) Glucagon B) Insulin C) Adrenaline
B) Insulin
What is negative feedback?
A process that counteracts a change in a physiological variable to maintain homeostasis.
True or False: Positive feedback enhances a change in a physiological variable.
True
Fill in the blank: The __________ is responsible for the fight or flight response.
autonomic nervous system
What are effectors in the context of homeostasis?
Muscles or glands that bring about the response to restore equilibrium.
What is the main function of the kidneys in homeostasis?
To regulate water and electrolyte balance, and remove waste products.
Multiple Choice: Which of the following is NOT a component of homeostatic control? A) Receptor B) Effector C) Stimulus D) Inhibitor
D) Inhibitor
What is the primary function of the skin in maintaining homeostasis?
To regulate body temperature through sweating and blood flow.
True or False: The endocrine system plays a significant role in homeostasis.
True
Fill in the blank: Hormones are __________ messengers that regulate physiological processes.
chemical
What is the role of glucagon?
To raise blood glucose levels by promoting the conversion of glycogen to glucose in the liver.
What is the term for the process of maintaining a constant internal environment?
Homeostasis
Multiple Choice: Which of the following is a response to high blood sugar levels? A) Release of glucagon B) Release of insulin C) Decrease in glucose uptake
B) Release of insulin
What is thermoregulation?
The process by which the body maintains its core internal temperature.
True or False: Homeostasis is only necessary for animals.
False
Fill in the blank: The __________ system regulates long-term changes in the body, including growth and metabolism.
endocrine
What do we call the body’s response to an increase in temperature?
Vasodilation and sweating
What is the function of the sweat glands in thermoregulation?
To produce sweat, which cools the body through evaporation.
Multiple Choice: Which part of the brain controls body temperature? A) Cerebellum B) Hypothalamus C) Brainstem
B) Hypothalamus
What is osmoregulation?
The control of water and electrolyte balance in the body.
True or False: Blood pressure is a factor that is regulated by homeostasis.
True
Fill in the blank: The __________ feedback loop is used to amplify a response in the body.
positive
What is the role of the liver in homeostasis?
To regulate blood sugar levels, produce bile, and detoxify substances.
Multiple Choice: Which hormone is released in response to stress? A) Insulin B) Cortisol C) Estrogen
B) Cortisol
What is the role of the negative feedback mechanism in the endocrine system?
To prevent overproduction or underproduction of hormones.
True or False: The body can function properly without homeostasis.
False
Fill in the blank: __________ is the process of maintaining a stable internal environment despite external changes.
Homeostasis
What is the significance of maintaining blood pH within a narrow range?
It is essential for proper enzyme function and metabolic processes.
What happens during vasoconstriction?
Blood vessels narrow, reducing blood flow to the skin to conserve heat.
Multiple Choice: Which organ regulates electrolyte balance? A) Heart B) Lungs C) Kidneys
C) Kidneys
What is the primary method of heat loss from the body?
Radiation
True or False: The body can only respond to one stimulus at a time.
False
Fill in the blank: Feedback mechanisms are essential for __________ in biological systems.
homeostasis
What is the role of the adrenal glands in response to stress?
They release hormones like adrenaline to prepare the body for a ‘fight or flight’ response.
