Hormones
What Endocrine gland secretes catecholamines (Epi/Norepi)?
Adrenal MEDULLA
First team to ALL perform Quadrobics earns the points
I'll enjoy it
How does anaerobic metabolism cause fatigue through a by-product accumulating?
Lactic acid... Lactate and H+ (increasing pH)
How could you directly measure the calorie expenditure of a winter Olympic athlete?
Measure heat production
What is the formula for cardiac output (CO)?
HR x SV
A water soluble hormone is made of what?
Protein or amnio acids
What RER (Respiratory exchange ratio) would represent carbohydrate breakdown?
1.0
Draw a graph of blood lactate as an athlete starts walking and progresses into a faster run/sprint.
INCLUDE resting units (mmol of lactate)
I'll draw it. 0.5 - 1 mmol resting
What hormone would greatly improve a long distance skiers performance?
EPO (Erythropoietin)
Walking at a high incline is most likely to deplete the muscle glycogen of what muscle group?
Calves
Describe an increased sensitivity to insulin + what insulins main effect
Greater response (entry of glucose into the cell) from less insulin released
What 3 variables would you need to know to calculate power (energy input) on a indoor bike?
resistance + wheel size + cadence
WHEN does DOMS (Delayed Onset Muscle Soreness) usually occur? AND what is the main cause?
1-2 days... muscle damage
Define critical power AND what energy system is dominant.
Highest intensity that can be maintained. Aerobic metabolism
What is Rhabdomyolysis? AND what is the biggest health concern?
Rapid breakdown of skeletal muscle. Released content is toxic to the kidneys
Describe the negative feedback loop of 1 hormone. Including at least 2 hormone names AND the gland producing it
MANY... High cortisol sensed by the anterior pituitary decreasing ACTH leading to less cortisol release from the adrenal cortex
CALCULATE. What is the energy expenditure for a 230 lb athlete with a VO2 max of 30 ml/kg/min exercising at 90% of his max for 10 minutes?
141 kcal
List 2 causes of CENTRAL fatigue
–Reduced motor cortex excitability
–Strength of signal from the CNS
–Serotonin decreasing “Willpower”
What is a poor VO2 max for a 20 year old female athlete and what is a great VO2 max.
PLUS relative units
Poor = 20 ml O2/kg/min
Great = 50
+/- 5 for points
Describe the 3 phases of tissue healing (correct order)
Inflammation
Proliferation
Maturation/Re-modeling
EXPLAIN