Homeostasis Flashcards
What is homeostasis?
Why does the internal environment need to be constant?
Fluctuations in the bodily enteral environment damages the cells.
Concept of control by negative feedback?
Stimulus detected by receptors.
Nerve impulses sent to 🧠.
Corrective mechanism to bring it back to norm.
Negative feedback is the reaction opposite to the stimulus.
How does the nervous system coordinate the response to xyz?
Stimulus. Specific receptor. Impulse generated. Sensory neurone. Synapse. Relay. Motor. Effector.
Corrective mechanism description.
Why does blood glucose concentration need to be controlled?
How negative feedback controls the blood glucose conc of a person who has not eaten for a day?
How an increased glucose concentration is controlled?
How negative feedback is involved in the control of the body temperature?
Homeostasis- maintenance of constant internal environment
Change in temp detected as stimulus
To keep temp constant
Corrective, opposite action by the body
To return the temp to normal
How negative feedback controls the body temp on a hot day?
How negative feedback controls the body temp on a cold day?
Effect of vasodilation and sweating?
Body temp decreases
Because more blood flow to the skin surface
Heat is lost through conduction and radiation
moisture on skin increases
Production of sewer removes latent heat of vapourization
How liver lowers blood glucose concentration?
Responds to insulin from pancreas
Increased uptake of glucose
Glucose converted to glycogen
glycogen is insoluble so it’s stored
Negative feedback
