Homeostasis Flashcards

Homeostasis refers to the process by which biological systems maintain stability while adjusting to changing external conditions.

Homeostasis is crucial for the survival and health of living organisms, as it ensures optimal functioning by regulating internal environments.

Factors such as temperature, pH, hydration, and the concentration of ions and nutrients are regulated during homeostasis.

Feedback mechanisms are processes that help maintain homeostasis by regulating internal conditions, primarily categorized into negative and positive feedback.

The nervous system coordinates voluntary and involuntary actions and transmits signals to maintain homeostasis.

The CNS consists of the brain and spinal cord, responsible for processing and transmitting information throughout the body.

The PNS includes all the nerves and ganglia outside the CNS, connecting it to limbs and organs.

Oxytocin is a hormone that plays a significant role in social bonding, reproduction, and childbirth.

The hypothalamus is a brain region that regulates various physiological processes, including temperature, hunger, and emotional responses.

Circadian rhythms are natural processes that regulate the sleep-wake cycle and repeat roughly every 24 hours.

Hormones act as chemical messengers that coordinate and regulate various physiological processes to maintain internal stability.

The kidneys help maintain pH balance by adding or removing bicarbonate ions from the extracellular fluid.

The Henderson-Hasselbalch equation describes how the ratio of bicarbonate to carbonic acid determines the pH of the extracellular fluid.

Acidemia refers to actual pH changes in the blood, while acidosis refers to the underlying causes of those changes.

Cybernetics is an interdisciplinary field that studies regulatory systems and focuses on communication and control processes in various systems.

The term 'cybernetics' was coined by Norbert Wiener in 1948.

Feedback loops are essential in cybernetics as they allow systems to self-regulate and adapt to changes in their environment.

The Macy Conferences were pivotal in the development of cybernetics, bringing together experts from various fields to discuss feedback systems.

The body responds to temperature changes through mechanisms like sweating to cool down or shivering to generate heat.

The adrenal glands release cortisol and adrenaline during stress, preparing the body to handle stressors.

Homeostasis is crucial for enzyme function, as enzymes operate optimally within a narrow range of conditions.

During childbirth, positive feedback amplifies contractions through the release of oxytocin, driving the process to completion.

Plants maintain homeostasis by regulating water loss through stomata and adjusting photosynthesis rates in response to environmental changes.

Disruptions to circadian rhythms can lead to sleep disorders and other health issues.