Excretion in Humans

(NB!!! Click on the down arrow to see the other options).

1) Which of the following is the best description of the function of the ureter ?

carrying fluids into the kidney carrying fluids out of the kidney carrying fluids from the bladder protecting the embryo carrying fluids to the embryo

2) An important constituent of blood plasma which does NOT become part of the filtrate in the Bowman's capsule is

protein sugars water red blood cells white blood cells

3) Reabsorbtion of useful solutes from the filtrate occurs in which of these parts of the kidney tubule?

proximal convolutions Bowman's capsule glomerulus loop of Henle collecting duct

4) Reabsorbtion of useful substances from the kidney tubule needs respiration energy because

osmosis depends on the energy of the molecules energy speeds up the slow diffusion diffusion depends on the energy of the molecules the molecules need energy to move active transport causes the molecules to move against the concentration gradient

5) Filtration into the Bowman's capsule of the kidney occurs because of

osmotic pressure forces the plasma solution out of the glomerulus the urine formed is continuously taken away forming a vacuum there is a higher pressure in the blood compared to the tubule fluid osmotic pressure draws the blood out of the glomerulus Bowman's capsule acts like a filter funnel

6) Which of these describes a major characteristic of the walls of the collecting duct ? It

absorbs glucose from the filtrate absorbs mineral ions from the filtrate draws water from the blood flowing past contracts using microfrils to narrow the tube diameter varies in permeability to water

7) In which part of the loop of Henle will the concentration of mineral salts in the fluid be the highest

near the distal tube near the proximal tube in the descending limb in the ascending limb at the bend near the bottom of the medulla

8) Which of the following is NOT correct about the proximal tubule?

walls made of ciliated epithelium cells with large brush borders most of the salts from the filtrate reabsorbed fluid contained is isotonic with plasma coiled up

9) Wich one of these best describes the substances that get excreted from the body ?

those where too much is taken in those which the body cells cannot use poisonous substances formed during digestion harmful substances made in the cells organic substances made in chemical reactions

10) The Malpighian body consists of the

proximal and distal tubules Bowman's capsule and proximal tubule glomerulus and Bowman's capsule loop of Henle and its capilliary network glomerulus and its proximal tube

11) Which of the following tends to remain constant as a result of the kidney functioning ?

content of the renal artery quantity of urine excreted composition of tissue fluid quantity of glucose in renal vein water concentration of the efferent arteriole

12)The kidney of an animal was studied and was found to have no loop of Henle. It is likely that this animal lived in

the soil a forest a river grassland the desert