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Lecture 1

KINESIOL 1A03 Lecture 1: WORD KIN 1A03 ; HOMEOSTASIS


Department
Kinesiology
Course Code
KINESIOL 1A03
Professor
Krista Howarth
Lecture
1

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Monday, January 18, y
CHAPTER 1: HOMEOSTASIS
KIN 1A03
*exercise increases heat production
Maintain body temperature (example of homeostasis):
SWEATING
-sweating comes from a variety of body water sources
-ex: Blood is one of these body water sources. If you sweat enough blood volume
begins to decrease. This happens when you exercise for long periods of time or
are in hot environments. Decreased blood volume = decreased blood pressure
* you need consistent blood pressure to maintain blood flow
* heart rate = # of heart beats/min
* high heart rate = high blood pressure
-During workouts signals sent out to increase sent out to increase thirst which
increases water intake. This water intake replenishes water body sources.
HOMEOSTASIS
The existence and maintenance of a relatively constant environment within the body
the ability or tendency of an organism or cell to maintain internal equilibrium by
adjusting its physiological processes
equilibrium = constant environment (***what body strives for)
values of variables ( blood glucose, blood pressure and body temperature) fluctuates
around the set point (normal level of a variable) to establish a normal range of values
-ex: body temperature set point ~ 37 degrees celsius but fluctuates all day
The role of organisms in homeostasis:
involves many organ systems as well as tissues and a variety of cells in the body
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