Unit 1: Notes 2 Flashcards
what is homeostasis?
maintaining a stable internal environment
what happens if homeostasis is disrupted?
it can result in illness, disease, and death if disrupted
when a stimulus is encountered, body systems _____ and _____
Monitor, Adjust
what must the body monitor and adjust?
volume in composition of body fluids, body temperature, sugar levels, calcium levels
why does the nervous system play a major role
because it response to external stimuli (e.g. a hot stove) w short term nerve responses
why does the endocrine system play a major role
because it response to internal conditions with long-term chemical controls - hormones
what are the three parts of a Basic homeostasis feedback loop
receptor, control center, effector
are negative feedback loops more common or more rare?
more common
are positive feedback loops more common or more rare?
more rare
does negative feedback loops oppose original stimulus or enhance the original stimulus
opposes
does the Positive feedback loop oppose the original stimulus or enhance the original stimulus?
enhances
does the negative feedback loop restore homeostasis what does it continue to disrupt homeostasis?
restores the homeostasis
does the positive feedback loop restore homeostasis or continue to disrupt homeostasis?
continue to disrupt homeostasis
what is the state of equilibrium?
- exists when opposing forces are in balance
- When homeostasis is threatened, physiological systems attempt to restore balance
- failure = disease or death
name some examples of negative feedback loops
hyperthermia, hypothermia, blood pressure
