Concentration/Dilution/Excretory System

Question 1

What is the concentration of a solution?

Answer 1

The concentration of a solution is the ratio of the amount of solute to the total quantity of solution.

Question 2

What does a concentrated solution contain?

Answer 2

A concentrated solution contains a large amount of dissolved solute in relation to the volume of the solution.

Question 3

What does a diluted solution contain?

Answer 3

A diluted solution contains a small amount of dissolved solute in relation to the volume of the solution.

Question 4

What is 30% in g/mL?

Answer 4

30g/100mL. This percentage shows the amount of solute per 100mL.

Question 5

L to mL?

Answer 5

X1000

Question 6

mL to L?

Answer 6

Divide by 1000.

Question 7

Concentration equation?

Answer 7

C = m/v

Question 8

Spectrophotometer?

Answer 8

Shines light through solutions.

Too much solute, results in a lower number on SPM. Therefore, higher concentration.

Question 9

Dilution?

Answer 9

C1 V1 = C2 V2

C1 = concentration of original solution
V1 = volume of original solution
C2 = concentration of new solution
V2 = volume of new solution

Question 10

What is the excretory system?

Answer 10

System which cleans blood via the kidneys.

It is responsible for getting rid of ant cellular waste from the body.

Question 11

What does the excretory system do?

Answer 11

Filters the blood by removing excess water, urea, carbon dioxide and excess salts.

Question 12

We remove excess water by?

Answer 12

Urinating, sweating and/or breathing.

Question 13

We remove urea by?

Answer 13

Urinating.

Question 14

We remove carbon dioxide by?

Answer 14

Exhaling.

Question 15

We remove excess salts by?

Answer 15

Seating and/or urinating.

Question 16

What do kidneys look like?

Answer 16

The two kidneys are each shapes like a bean and the size of a computer mouse.

Question 17

What does the renal artery do?

Answer 17

The renal artery transports blood from the heart to the kidney.

Question 18

What does the renal vein do?

Answer 18

The renal vein transports blood from the kidney back to the heart.

Question 19

What are the ureters?

Answer 19

Tubes connecting the kidneys to the bladder.

Question 20

What is the bladder?

Answer 20

A sac, which holds urine until it is time to be excreted.

Question 21

What is the urethra?

Answer 21

The tube through which urine travels from the outside of the body.

Question 22

What are nephrons?

Answer 22

Millions of nephrons are found within the cortex/medulla of the kidney.
They remove any excess water and waste from the blood through diffusion.
They produce urine.

Question 23

How do kidneys filter blood?

Answer 23

• Blood enters the kidney through the renal artery.
• Waste, salts, urea, etc. diffuse into the nephrons (microscopic little filters).
• The waste travels from the nephrons into the renal pelvis which is connected to the ureter.
• Now urine, leads down the ureter into the bladder.
• Once the bladder fills part way, the urine is excreted out of the urethra.

Question 24

What is urine?

Answer 24

• Kidneys filter blood, and create waste. This waste is called urine.
• Urine is mostly made up of water, urea, and uric acid.
• It also contains electrolytes, which are made up of potassium and sodium (excess salts).

Question 25

What are electrolytes made up of?

Answer 25

Electrolytes are made up of potassium and sodium (excess salts).

Question 26

What is homeostasis in the excretory system?

Answer 26

To keep things balanced:

• Drink lots of water and urinate when needed.
• Dark yellow urine may be the result of not drinking enough water or breathing/sweating a lot/
• Too much salt in the blood, or excessive dehydration, can lead to a build up of salt crystals in the kidneys known as kidney stones.