excretion in humans (topic 13) Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

excretion

A

the removal of toxic materials and substances in excess of requirements from organisms.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

name 3 excretory products

A

carbon dioxide, urine, sweat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

describe excretion of carbon dioxide

A

co2 is one of the products of aerobic respiration, excreted via lungs after being transported there by its dissolved self in blood plasma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the urinary system

A

Organ system involved in excretion of urea, and excess salts and water. It includes the kidneys, ureters and urethra.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

ureter

A

carries urine to the bladder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

urethra

A

carries urine to the outside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

bladder

A

temporarily stores urine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what does the kidney do

A

excrete urea, excess water and ions as urine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

passageway of urine in body

A

kidney- ureter- bladder- urethra

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

function of liver

A

assisting the body in taking up amino acids for cellular use
breaking down excess amino acids (deamination)- to produce urea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

deamination

A

The removal of the nitrogen-containing part of amino acids to form urea.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the role of the liver in assimilation

A

converts amino acids into proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

where is urea formed

A

in liver, by excess amino acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

renal artery vs renal vein

A

renal artery- carries blood to the kidney
renal vein- carries blood away from kidney

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the structures in the kidney

A

cortex, medula, ureter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

cortex

A

outer part where blood is filtered and some selective reabsorption happens

17
Q

medulla

A

inner part where some selective reabsorption happens, and fluid is collected to form urine

18
Q

what are neprhons

A

structure, in which millions are present in the kidney positioned between the cortex and the medulla

19
Q

what is the role of the nephron

A

to filter the blood, separating waste and returning substances that are needed back to the bloodstream

20
Q

what is the glomerolous

A

unit of filtration in the nephron, consists of a network of capillaries
-water, glucose, urea, ions enter tubule (go through glomerolous
-proteins are too big of molecules to pass

21
Q

what is the tubule

A

Part of a kidney nephron in which selective reabsorption of substances occurs.

22
Q

what substances are reabsorbed in the tubule

A

all of the glucose
most of the water
some ions.

23
Q

composition of urine

A

urea, excess water and excess ions

24
Q

what is the importance of excreting urea

A

it is toxic