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[BIO 169] Lab Practical 1 (Answered) 100% Correct. Updated 2024/2025.
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[BIO 169] Lab Practical 1 (Answered)100% Correct. Updated 2024/2025.
Homoeotherms
elevate their body temperature and maintain it within a defined range
Thyroid stimulating hormone is released directly into the blood and affects cells in the
Thyroid
Thyroid Releasing Hormone is secreted by
neurosecretory cells in the hypothalamus
T3 and T4 are
hydrophobic and stored in the extracellular thyroglobulin
The majority of thyroid hormone is secreted in the form of
T4
Thyroid Releasing Hormone is released into the blood and directly affects cells
in the anterior pituitary gland
The body's thermostat is located in the
hypothalamus
Why did the mouse exhibit a higher metabolic rate as the temperature was decreased below 18 degrees
Celcius?
the mouse shivered while being exposed to the extreme cold temperature
What is the effect of moderate cooling on the rate of oxygen consumption?
the rate of oxygen consumption increased
As the temperature was ______________ the metabolic rate __________ due to
___________________________ .
decreased, increased, increased activity of the thyroid gland
The amount of hemoglobin that binds to oxygen is dependent upon
all of the above.
The partial pressure of oxygen is
the portion of the barometric pressure produced by oxygen
, As the partial pressure of oxygen is significantly lowered the affinity between oxygen and hemoglobin
decreases
Which of the following would increase the relative acidity of the blood?
both A and C are correct
A right shift in the oxygen dissociation curve would occur as the blood _________ _______________ .
pH, decreased
At partial pressure of oxygen of 50 mmHg, a lower pH would result in
increased release of oxygen from Hemoglobin
At partial pressure of oxygen of 50 mmHg, a decrease in DPG would result in
decreased release of oxygen from Hemoglobin
Red Blood Cells
make ATP through glycolysis
2,3 Diphosphoglycerate is a molecule that
both B and C are correct
A right shift in the oxygen dissociation curve would occur as the blood _________ _______________ .
DPG levels increase
The ECG measures
action potentials in the atria ventricles
You are measuring the impact of exercise on the ECG of an individual. You notice that the T - P interval is
reduced as the person exercises. The T - P interval is located _________ and from this observation you
can determine that___________________
between adjacent ECGs as T corresponds to the repolarization of the ventricles; the duration of blood
flow to the coronary arteries is decreased between cardiac cycles
You are measuring the impact of exercise on the ECG of an individual. You notice that the P - R interval
does not change as the person exercises. From this observation you can determine that
exercise has no impact on the atrial action potential
The lub sound is created when _________________ while the dub sound is created when
____________________ .
AV valves close, Semi lunar valves close
The lub sound corresponds to _________________, while the dub sound corresponds to
____________________________ .
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