Steps of Excretion Diagram and Concepts

Identify the fluid A

Blood plasma

Identify the fluid B

Filtrate

Identify the fluid C

Urine

Identify the two substances reabsorbed in I.

glucose and amino acids

Identify the two substances reabsorbed in II.

Na⁺, Cl^- (or NaCl)

Identify the three substances reabsorbed in III.

Ca⁺², Na⁺, Cl^-

Identify the two substances added in IV.

drug residue, H⁺

What is the substance reabsorbed in ?

Water

What process/transport is used for the green arrows?

active transport

What process/transport is used for the orange arrows?

osmosis

What occurs in 1.

Ultrafiltration

What occurs in 2.

Selective reabsorption

Where is water reabsorbed in excretion?

proximal convoluted tubule and loop of Henle (descending limb)

What type of transport is used to reabsorb water?

osmosis

Why is water needed to reabsorbed?

maintains levels of cytoplasm and blood plasma

Where are amino acids reabsorbed in excretion?

proximal convoluted tubule

What type of transport is used to reabsorb amino acids?

active transport

Why are amino acids needed to be reabsorbed?

to form polypeptides (proteins)

Where is glucose reabsorbed in excretion?

proximal convoluted tubule

What type of transport is used to reabsorbed glucose?

active transport

Why is glucose needed to be reabsorbed?

cellular respiration (ATP)

Where is sodium and chloride ions reabsorbed?

in the ascending limb of the loop of Henle and distal convoluted tubule

Why are sodium and chloride ions needed to be reabsorbed?

nerve transmission

Where are hydrogen ions secreted into in the nephron?

distal convoluted tubule

What type of transport is used to secrete hydrogen ions into the distal tubule?

active transport

Why is hydrogen ions needed?

prevent blood plasma acidity

In the renal artery, there is __ amount of oxygen

more

In the renal artery, there is __ amount of glucose

same

In the renal artery, there is __ amount of urea

more

In the renal artery, there is __ amount of plasma proteins

same

In the renal artery, there is __ amount of sodium and chlorine ions

more

Renal artery is the beginning or end of the excretion steps?

beginnning

In the renal vein, there is __ amount of oxygen

less

In the renal vein, there is __ amount of glucose

same

In the renal vein, there is __ amount of urea

less

In the renal vein, there is __ amount of plasma proteins

same

In the renal vein, there is __ amount of sodium and chlorine ions

slightly less