WorksheetsA2 Biology, Homeostasis, Urine Formation(1)
Total questions: 20
Worksheet time: 12mins
Urea is formed by the.............and excreted by the...................
kidney, urethra
liver, kidney
liver, urethra
kidney, liver
The first event that leads to urine formation is
Glomerular reabsorption
Ultrafiltration in the PCT
Ultrafiltration at the glomerulus
Reabsorption at the PCT
The pressure that drives ultrafiltration is maintained by the following except
Pumping action of the heart
Presence of a basement membrane that acts as a filtration barrier
Smaller size of the afferent arteriole compared to the efferent
Smaller size of the efferent arteriole compared to the afferent
Which of the following statements is true about glomerular filtrate?
It is found in the glomerulus
It is formed by the glomerulus
It is found in the Bowman's capsule
It is formed by the Bowman's capsule
It contains fewer plasma proteins compared to blood
Glucose is filtered out of the blood at the................
Glomerulus
PCT
Bowman's capsule
Nephron
Two groups of capillaries found around the nephron are................and.................. capillaries
(a)
What is true about the requirements for the reabsorption of glucose at the PCT?
ATP is needed to actively pump glucose out of the PCT lumen
Cotransporters are needed to transport glucose along with sodium ions into the blood
ATP is needed to pump sodium ions out of the PCT cells
Sodium potassium pump is needed to maintain a low concentration of sodium ions inside the PCT cells
Cotransporters are needed to transport glucose along with sodium ions into the PCT cells
As long as renal threshold is not exceeded,
All the glucose in the PCT will be reabsorbed
All the glucose in the blood will be filtered out at the glomerulus
Sugary urine will be formed
Kidney stone disease will not occur
Reabsorption occurs in which of the following parts
PCT
Glomerulus
Nephron
Loop of Henle
How is the loop of Henle different in structure from the PCT
It is coiled
It possess glucose cotransporters
Parts of it are impermeable to water
It is long
Which of the following statements is true about the flow of blood through the kidneys?
The efferent arteriole is a branch of the renal artery
Blood leaving the glomerulus enters straight into the efferent arteriole
Blood enters the renal vein from the peritubular capillaries
Blood enters the renal vein from the efferent arterioles
Which is the correct sequence that shows the flow of tubular fluid passing through the nephron: (a) glomerulus (b) distal convoluted tubule (c) loop of Henle (d) collecting duct (e) proximal convoluted tubule
a, b, c, d, e
c, d, b, a, e
a, e, c, b, d
a, e, d, b, c
The Bowman's capsule of the nephron are usually located in the ..................................of the kidney
glomerulus
cortex
medulla
pelvis
Which of the following constitute the filtration barrier required for ultrafiltration? (a) glomerular endothelium (b) afferent arteriole (c) basement membrane (d) podocytes (e) efferent arteriole
a, b, c, d, and e
c, d, and e
a, c and d
a, b and e
Podocytes refers to the epithelial cells lining the ....................................
glomerulus
proximal convoluted tubule
distal convoluted tubule
Bowman's capsule
Which of the following will not be filtered out during ultrafiltration? (a) red blood cells (b) water (c) glucose (d) amino acids (e) platelets (f) large plasma proteins
a, d and e
a, e and f
b, c, and d
a, b, c and d
Which of the following is not true about the adaptation of the PCT for reabsorption?
The luminal membrane possess numerous microvilli which increase surface are for absorption
The basal membrane is also folded to provide large surface area for reabsorption and create channel spaces which contains fluid
It possess tight junctions holding adjacent cells together and preventing fluid from passing between the cells to the peritubular environment
It possess numerous mitochondria within the cells which provide energy for active uptake and secretion of glucose
Cotransporters are found on which part of the PCT cells?
basal membranes
luminal membranes
mitochondria
basement membrane
What component of the glomerular filtrate is the first to be reabsorbed in the nephron?
Water
Glucose
Urea
Chlorine
Which of the following carrier proteins is not involved in the reabsorption of glucose in the PCT
Sodium potassium pump
Proton pump
Glucose symporters
Glucose channels
