Circulation and Excretion Quiz
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Where does filtration occur in the nephron?
A. glomerulus
B. loof of Henle
C. proximal convoluted tubules
What regulates human respiration rate?
A. oxygen levels
B. carbon monoxide levels
C. carbon dioxide levels
In which of the following would you expect to have the greatest blood pressure on the aorta?
A. systole of the left ventricle
B. diastole of the left ventricle
C. systole of the right atrium
D. systole of the right ventricle
The Bowman’s capsules are found in
A. Cortex
B. Medulla
C. Convoluted tubule
D. Loop of Henlé
Why do premature infants suffer respiratory failture?
A. sudden changes in the oxygen from the uterine environment
B. mutations in genes regulating the formation of the lungs
C. lungs collapse due to lack of surfactants
Which is a normal event in blood clotting?
A. production of erythropoietin
B. activiation of prothrombin to thrombin
C. conversion of fibrin into fibrinogen
What causes the Bohr shift?
A. changes in pH
B. changes in partial pressure of oxygen
C. hemoglobin concentration
A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. To travel from the artery to the thumb and then back to the left ventricle, how many capillary beds must this RBC flow through?
A. 4
B. 3
C. 2
What happens when carbon dioxide levels increase in the blood?
A. pH increases forcing the organisms to decrease respiration rate
B. pH decreases forcing the organism to increase respiration rate
C. the stretch receptors in the lungs cause the medulla oblongata to slow breathing
Which of the following mechanisms are used to regulate blood pressure in the closed circulatory system of vertebrates?
A. changing force of the contraction of the heart
B. constricting and relaxing sphincters in the walls of arterioles
C. adjusting the volume of the blood in the veins
D. all the above
E. only a and b
Which stores more oxygen under the same atmospheric conditions?
A. fresh water
B. sea water
Most of the carbon dioxide produced by humans
A. converted to bicarbonate ions by and enzyme on the RBC
B. bound to hemoglobin
C. simply dissolved in the plasma
Ammonia is the most toxic nitrogenous waste. Organisms that produce this must have access to lots of
A. oxygen
B. proteins
C. dry air
D. water
The hollow space at the centre of kidney where urine is collected after its formation is called
A. Urethra
B. Distal convoluted tubule
C. Glomerulus
D. Renal pelvis
Urea is a product of the breakdown of proteins and nucleic acids. Where is it produced in the body?
A. liver
B. kidney
C. lung
