Exam (elaborations)
KNES 348 Exam 1 questions with correct answers
- Course
- Knes
- Institution
- University Of Maryland - University College
KNES 348 Exam 1 questions with correct answers
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KNES 348 Exam 1 questions with correct answersWork Correct Answer-The product of force and the distance through
which that force acts. Work= force x distance
SI unit is in newton meters or joules
Power Correct Answer-describes how much work is accomplished per
unit of time. SI unit is watt (W) and is 1 joule per second. Power=
Work/Time
METs Correct Answer-The resting metabolic rate is usually measured
with an individual at quiet supine rest, after a period of fasting and not
participating in exercise. The rate varies with age and gender, being less
in females and decreases with age. the MET represents resting
metabolism taken at 3.5 ml x kg x min... The energy cost of activities
can be expressed in terms of multiples of the MET unit and help
compare relative intensity of various activities.
Relationship between metabolic rate, VO2/oxygen consumption, and
energy/caloric expenditure Correct Answer-
exercise economy Correct Answer-a measure of the energy cost of an
activity at a given exercise velocity.
Exercise efficiency Correct Answer-capacity to convert energy
expenditure into work. Ratio of the work done to the energy put in to do
the work. A more efficient individual uses less energy to do the same
amount of work. Affected by the exercise work rate, speed of
, movement, and fiber composition of the muscles performing the
exercise.
Homeostasis Correct Answer-Maintenance of a relatively constant
internal environment
negative feedback Correct Answer-Most control systems of the body
operate using this feedback system. Restores normal values of a variable
to maintain homeostasis. Example: respiratory system's regulation of the
CO2 concentration in extracellular fluid. Body notices increase in cell
CO2 which triggers a receptor. The receptor sends that stimulus to the
respiratory control center to increase breathing and bring more air into
the lungs. The effectors are the respiratory muscles which increase
breathing thus reducing extracellular CO2 and bring the levels back
down to normal.
exercise steady state vs homeostasis Correct Answer-Steady state is used
to denote a steady and unchanging level of some physiological variable
(heart rate). Homeostasis is used for a relatively constant and normal
internal environment during resting conditions and a steady state does
not meant that the variable is at resting values, just constant and
unchanging.
biologic control and response pathway from exercise stress Correct
Answer-Series of interconnected components that maintain a physical or
chemical parameter at a near constant value. It involves sensors or
receptors detecting changes, the control center that receives input and
initiates a response, and the effector which changes internal environment
back to normal. Failure of a biological control system results in a
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