excretory system

Question 1

what are the 4 excretory organs

Answer 1

1- lungs
2- skin
3-anus
4- kidney

Question 2

what is the main function of the excretory system

Answer 2

process of getting rid of metabolic waste

Question 3

what is the lungs responsible for

Answer 3

remove carbon dioxide, water and alcohol

Question 4

what is the skin responsible for

Answer 4

absorb water, salts some urea

Question 5

what is the anus responsible for

Answer 5

bile pigments, metabolic solid wastes, undigested nutrients (cellulose)

Question 6

what is the kidney responsible for

Answer 6

nitrogenous wastes from protein metabolic, urea, poisons, water, mineral/salts

Question 7

5 function of the kidneys

Answer 7

1-filters blood from 25% of the left ventricle
2-removes wastes and excretes them in a concentrated state (urine)
3- involved in water balance
4- regulates acid/base balance in body
5-excrete unwanted chemicals (toxins)

Question 8

renal artery and function

Answer 8

blood vessel from aorta to kidney/ carries wastes to kidney

Question 9

renal vein and function

Answer 9

blood vessel from kidney to vena cava/ most wastes removed and blood is returned to the heart

Question 10

ureters

Answer 10

• lead from kidney to bladder
• thin tubes
• moves urine by peristalsis

Question 11

urinary bladder

Answer 11

• in pelvic cavity behind the pubic bone

- hollow storage sac

Question 12

adrenal gland

Answer 12

• on top of kidneys
• hormonal secretion
• endocrine gland

Question 13

urethra

Answer 13

• conveys urine from urinary bladder to outside body
• in males carries semen & urine
• in females carries only urine

Question 14

what are the 3 blood vessels of the nephron

Answer 14

1-afferent arteriole
2- glomerulus
3- efferent arteriole

Question 15

afferent arteriole

Answer 15

arteriole leading to nephron (to bowmons capsule)

Question 16

glomerulus

Answer 16

ball of capillaries unlike other capillary beds (fed and drained to arterioles)

Question 17

efferent arteriole

Answer 17

arteriole leading away from glomerulus contains blood that is left after filtration

Question 18

collecting tubule

Answer 18

receives urine from nephron

Question 19

urine formation

Answer 19

1- filtration-diffusion hydrostatic pressure
2-reabsorption- active transport % diffusion
3-secretion- active transport out of blood

Question 20

urine filtration

Answer 20

process which substances are forced out of the blood stream into the nephron

Question 21

forced filtration

Answer 21

blood pressure about 60 -70 mm Hg forces plasma out of glomerulus (passive process)

Question 22

reabsorption

Answer 22

materials returned to capillaries by the rest of the nephron

Question 23

what are the different transportations involved in reabsorption

Answer 23

osmosis, active transport and diffusion

Question 24

proximal convoluted tubule

Answer 24

active transport occurs here

filled with mitochondria this helps move materials that need energy to be transported