KIN 310 Exam 3 MSU-Currie || with Errorless Solutions
100%.
pH correct answers the concentration of H+ in body fluids
acid correct answers release H+
base correct answers readily combine with H+
normal pH correct answers 7.4, 0.05 SD
pH<7.4 correct answers acidosis
pH>7.4 correct answers alkalosis
why is acid-base balance important during exercise correct answers -increased production of H+
will decrease pH
-decreased pH can hinder exercise performance
what are the sources of H+ production during exercise correct answers 1. aerobic ATP
production
2. anaerobic ATP production
3. ATP breakdown in muscles
aerobic ATP production correct answers CO2 produced in the creation of acetyl CoA and in the
Krebs cycle
-CO2 travels in the blood stream as bicarbonate
anaerobic ATP production correct answers glycolysis produces pyruvate
higher intensity exercise results in _____ H+ production due to recruitment of type ____ fibers
correct answers large, IIx
buffer correct answers resists pH change
-removes H+ when pH is decreasing
-releases H+ when pH is increasing
buffers often consist of a ___________ and ____________ correct answers weak acid, conjugate
base
ability of buffers to resist change in pH depends on: correct answers -intrinsic ability to buffer
-[buffer]
two types of buffer systems correct answers 1. intracellular (within muscle fiber)
2. extracellular (in blood)
, 4 major classes of intracellular buffers correct answers 1. bicarbonate
2. phosphates
3. cellular proteins
4. histidine dipeptides
intracellular buffer system includes correct answers -intracellular buffers
-H+ transporters on sarcolemma
H+ transporters are located on correct answers sarcolemma
-Move H+ out of muscle fiber to be buffered extracellularly
1. Sodium-hydrogen exchanger
2. monocarboxylate transporter
extracellular buffers include correct answers protein, hemoglobin, bicarbonate
can supplements improve buffer capacity correct answers -sodium bicarbonate and sodium
citrate
-beta-alanine
regulation of acid-base balance during exercise correct answers •increase [H+] and therefore ↓
pH
•Depends on exercise intensity, duration and muscle mass involved
•↓ pH in muscle greater than blood
-H+ produced in muscle
-Muscle buffer capacity lower than blood
>45 C... correct answers destroy proteins/enzymes and leads to death
<34 C... correct answers slow metabolism and cause arrhythmias
70-80% of energy expended during exercise is released as ..... correct answers heat
involuntary heat production correct answers shivering and non-shivering thermogenesis
radiation correct answers -transfer of heat via infrared rays
-60% heat loss at rest
-can be a method of heat gain
conduction correct answers heat loss due to contact with another surface
convection correct answers heat transferred to air or water molecule in contact with it
evaporation correct answers heat from skin converts water to water vapor
evaporation rate depends on correct answers -temperature and relative humidity
100%.
pH correct answers the concentration of H+ in body fluids
acid correct answers release H+
base correct answers readily combine with H+
normal pH correct answers 7.4, 0.05 SD
pH<7.4 correct answers acidosis
pH>7.4 correct answers alkalosis
why is acid-base balance important during exercise correct answers -increased production of H+
will decrease pH
-decreased pH can hinder exercise performance
what are the sources of H+ production during exercise correct answers 1. aerobic ATP
production
2. anaerobic ATP production
3. ATP breakdown in muscles
aerobic ATP production correct answers CO2 produced in the creation of acetyl CoA and in the
Krebs cycle
-CO2 travels in the blood stream as bicarbonate
anaerobic ATP production correct answers glycolysis produces pyruvate
higher intensity exercise results in _____ H+ production due to recruitment of type ____ fibers
correct answers large, IIx
buffer correct answers resists pH change
-removes H+ when pH is decreasing
-releases H+ when pH is increasing
buffers often consist of a ___________ and ____________ correct answers weak acid, conjugate
base
ability of buffers to resist change in pH depends on: correct answers -intrinsic ability to buffer
-[buffer]
two types of buffer systems correct answers 1. intracellular (within muscle fiber)
2. extracellular (in blood)
, 4 major classes of intracellular buffers correct answers 1. bicarbonate
2. phosphates
3. cellular proteins
4. histidine dipeptides
intracellular buffer system includes correct answers -intracellular buffers
-H+ transporters on sarcolemma
H+ transporters are located on correct answers sarcolemma
-Move H+ out of muscle fiber to be buffered extracellularly
1. Sodium-hydrogen exchanger
2. monocarboxylate transporter
extracellular buffers include correct answers protein, hemoglobin, bicarbonate
can supplements improve buffer capacity correct answers -sodium bicarbonate and sodium
citrate
-beta-alanine
regulation of acid-base balance during exercise correct answers •increase [H+] and therefore ↓
pH
•Depends on exercise intensity, duration and muscle mass involved
•↓ pH in muscle greater than blood
-H+ produced in muscle
-Muscle buffer capacity lower than blood
>45 C... correct answers destroy proteins/enzymes and leads to death
<34 C... correct answers slow metabolism and cause arrhythmias
70-80% of energy expended during exercise is released as ..... correct answers heat
involuntary heat production correct answers shivering and non-shivering thermogenesis
radiation correct answers -transfer of heat via infrared rays
-60% heat loss at rest
-can be a method of heat gain
conduction correct answers heat loss due to contact with another surface
convection correct answers heat transferred to air or water molecule in contact with it
evaporation correct answers heat from skin converts water to water vapor
evaporation rate depends on correct answers -temperature and relative humidity
