Circulation and Excretion Quiz
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Why do capillary beds have such low pressure?
A. The don’t, they have very high blood pressure to force the diffusion of oxygen and nutrients into cells.
B. Fluid loss from arteries is high enought that pressure drops by the time blood reaches capillaries.
C. The total cross-section diameter of the arterial circulation increases with progression from the artery to arteriole to capillary,leading to reduced blood pressure.
The Bowman’s capsules are found in
A. Cortex
B. Medulla
C. Convoluted tubule
D. Loop of Henlé
Process that returns materials to the blood from the filtrate
A. reabsorption
B. secretion
C. filtration
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
What type of excretory organs do insects and flatworms have?
A. protonephridia, metanephridia
B. Malpighian tubules, protonephridia
C. metanephridia, Malpighian tubules
To maintain homeostasis, fresh water fish
A. excrete large amounts of water
B. take in large quantities of water
C. take in large quantities of electrolytes
The muscular tubes which take the urine from the kidneys to the bladder are
A. Urethras
B. Urinary bladders
C. Nephrons
D. Ureters
When the circulating blood fluid is distinct from the fluid that directly surrounds the body’s cells, what type of circulatory system is this?
A. closed
B. open
C. gastrovascular
Which process is least selective?
A. filtration
B. secretion
C. reabsorption
Water across the gills of fish and the blood in the gills does in opposite direction enhancing the diffusion of oxygen from the water into the blood. What is this flow in the opposite direction called?
A. undirectional flow
B. countercurrent exchange
C. atriventricular exchange
The basic functional unit of human kidney is
A. Henlé’s loop
B. Nephron
C. Nephridia
D. Pyramid
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 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
The principal nitrogenous excretory compound in humans is synthesised
A. In kidneys but eliminated mostly through liver
B. In liver and also eliminated by the same through bile
C. In kidneys as well as eliminated by kidneys
D. In the liver but eliminated mostly through kidneys