Sports science - homeostasis Flashcards
Define homeostasis
the maintenance of a constant and “normal” internal environment
What is dynamic constancy?
changes in arterial blood pressure at rest
What is steady state?
changes in body core temperature during submaximal exercise
What does it mean when the body is at steady state?
a balance has been achieved between the demands placed on the body and the bodys response to those demands
What are the 2 control systems of the body?
- intracellular control systems
- organ systems
What occurs in intracellular control systems?
- protein breakdown and synthesis
- energy production
- maintenance of stored nutrients
What occurs in organ systems?
- pulmonary and circulatory systems
- they replenish oxygen and remove carbon dioxide
What are the components of a biological control system?
- stimulus
- sensor
- control center
- effector
- homeostasis
What is negative feedback?
response reverses the initial disturbance in homeostasis
Do most control systems work via negative or positive feedback?
negative
Is a system with low gain more capable of maintaining homeostasis than a system with large gain? Yes or no?
no
Name 2 examples of homeostatic control
- regulation of body temp
- regulation of blood glucose
State and explain an example of failure of an effector
- type 1 diabetes
- damage to beta cells in pancreas
- insulin is no longer released into blood
- hyperglycemia results in increased blood glucose
What is the role of the sensor?
sends data to control center
What is the role of the control center?
response to stimulus
