Communication & Homeostasis Flashcards
What is homeostasis?
Homeostasis is the ability of an organism to maintain a stable internal environment despite external changes.
Which system is responsible for communication and coordination in the body?
The nervous system is responsible for communication and coordination in the body.
True or False: Hormones are chemical messengers produced by glands in the endocrine system.
True
What is the role of the hypothalamus in homeostasis?
The hypothalamus regulates body temperature, hunger, and thirst to maintain homeostasis.
Which hormone is responsible for regulating blood sugar levels?
Insulin is responsible for regulating blood sugar levels.
What is negative feedback in the context of homeostasis?
Negative feedback is a mechanism where the body’s response aims to bring levels back to the optimum
Fill in the blank: The receptors in the skin that detect temperature changes are called _______.
thermoreceptors
Which part of the brain controls breathing and heart rate?
The medulla controls breathing and heart rate.
What is the function of the pituitary gland?
The pituitary gland secretes hormones that regulate various bodily functions.
True or False: Homeostasis is only important for maintaining temperature balance in the body.
False
Which organ is responsible for filtering waste from the blood and maintaining fluid balance?
The kidneys are responsible for filtering waste from the blood and maintaining fluid balance.
What is the main function of the endocrine system?
The main function of the endocrine system is to regulate various bodily functions through the secretion of hormones.
Which hormone is responsible for the fight or flight response?
Adrenaline is responsible for the fight or flight response.
Fill in the blank: The _______ system consists of glands that secrete hormones directly into the bloodstream.
endocrine
What is the primary function of the pancreas in homeostasis?
The pancreas regulates blood sugar levels by producing insulin and glucagon.
True or False: Hormones travel through the bloodstream to reach target cells.
True
What is the role of the adrenal glands in the stress response?
The adrenal glands release cortisol and adrenaline in response to stress, preparing the body for action.
Which part of the brain is responsible for emotional responses and memory?
The limbic system is responsible for emotional responses and memory.
What is the function of the thyroid gland in homeostasis?
The thyroid gland regulates metabolism and energy balance in the body.
Fill in the blank: The _______ nervous system controls involuntary functions like heart rate and digestion.
autonomic
Which hormone is responsible for regulating the sleep-wake cycle?
Melatonin is responsible for regulating the sleep-wake cycle.
What is the significance of the sodium-potassium pump in maintaining cell homeostasis?
The sodium-potassium pump helps maintain the balance of ions inside and outside the cell, crucial for cell function.
True or False: The pancreas is both an endocrine and exocrine gland.
True
What is the role of the thymus gland in the immune system?
The thymus gland produces T-lymphocytes, crucial for immune response.
Which hormone is responsible for regulating calcium levels in the blood?
Parathyroid hormone is responsible for regulating calcium levels in the blood.
Fill in the blank: The _______ system is responsible for releasing hormones in response to stress.
adrenal
What is the main function of the pineal gland?
The main function of the pineal gland is to regulate sleep-wake cycles and seasonal biological rhythms.
True or False: Homeostasis is a dynamic process that constantly adjusts to maintain stability.
True
