Bio Topic 6

Question 1

How is urea made

Answer 1

There is a process called deamination in which amino acids are broken down in the liver to form urea

Question 2

Where is urine made

Answer 2

Urine is made in the kidneys

Question 3

Describe osmoregulation

Answer 3

-control of balance of water and mineral salts in the body. -if the balance is incorrect cells may take in or lose too much water by osmosis. - cells become damaged

Question 4

What is the function of the urinary system

Answer 4

Function: remove excess amounts of substances from the blood ,including water and mineral salts

Question 5

What is the pathway of urine

Answer 5

1) kidney. 2) ureter. 3)bladder. 4) urethra. 5)out of the body

Question 6

Describe what the renal arteries do

Answer 6

They carry blood from the body to the kidneys

Question 7

Describe what the renal veins do

Answer 7

They carry blood with wastes remove back to the body

Question 8

Describe the function of the kidneys

Answer 8

Remove substances from the blood and make urine

Question 9

What does the ureters do

Answer 9

They carry urine from the kidneys to the bladder

Question 10

What does the bladder do

Answer 10

It stores urine

Question 11

How does the urine leave your body

Answer 11

Urine flows through the urethra to the outside of the body

Question 12

What is dialysis

Answer 12

The clinical purification of blood by dialysis, as a substitute for normal function of the kidney

Question 13

What is a nephron

Answer 13

It is the site in your kidneys in which urine is produced in the process of removing waste and excess substances from the blood

Question 14

In a nephron where does the blood flow from and to

Answer 14

The blood will flow from the glomeulus into the bowman’s capsule

Question 15

What three substances do the glomerulus and bowman’s capsule allow into the nephron

Answer 15

Water,urea and glucose

Question 16

What is the name of the process in which water ,urea and glucose pass into the nephron

Answer 16

Filtration

Question 17

What substances can’t get through the glomerulus

Answer 17

Protein and blood cells

Question 18

Describe the whole process of selective reabsorption of glucose and water

Answer 18

1)The filtrate flows along the nephron.
2) at the first convoluted tubule certain, useful molecules such as glucose and water are reabsorbed back into the blood
3)proteins in the cell membrane of the first convoluted tubule pumps the glucose and water from the nephron to blood by active transport

Question 19

Describe the whole process of selective reabsorption of water

Answer 19

1)Some water is reabsorbed via osmosis in the loop of Henie back into the blood
2) additional water may be absorbed from the collecting duct if the body is dehydrated

Question 20

Describe excretion

Answer 20

At the end of the nephron the remaining fluid flows into the ureter
The fluid containing excess water that the body doesn’t need plus urea and other substances now it is know as urine

Question 21

What happens to your adh levels when water content is too high

Answer 21

1)Water content is too high
2) hypothalamus detects and pituitary gland releases less adh
3)adh makes the collecting ducts become less permeable
4)less water is reabsorbed
5 ) normal blood water content