Chapter 3 Excretion
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Transcript of Chapter 3 Excretion
1,1j NltwsttEtst*lon
1 Which of these statementsbest describes the processof excretion?A It is the process by
which blood is filteredand cleansed by thekidneys.
B It is the process bywhich undigested foodis removed by rhe bodythrough the anus.
C It is the process
whereby plantsshed their leaves inunfavourableconditions.
D It is the process bywhich excretoryproducts produced bythe activities ofcells are
removed from the body.
Which of the following isnot an excretory organ?A SkinB I IeartC Lungs
D Kidneys
Which of rhe followingprocesses would be affectedifthe kidneys are foundnot to be functioningproperly?A DigestionB ExcretionC RespirationD Reproduction
Each question below is followed by four possible answers, A, B, C and D. Choose the correct or best answer.
Which of these substances
is not an excretoryproduct?A UreaB WaterC Amino acidD Carbon dioxide
Which of the following are
correctly matched?
Skin Urea
Kidney Protein
Lungs Carbondioxide
A X and Y onlyB X and Z onlyC Y andZonlyD X, Y and, Z
Which of these substances
is not removed by thesweat glands ofthe skin?A UreaB WaterC Mineral salts
D Carbon dioxide
The diagram shows a partofthe human excretorysystem.
t)
What are K I and M?
r L
Renalanery
Urethra Urcter
Renalvein
Urcter Urethra
Kidney Urinarybladder
Penis
Venacala
Penis lvledulla
a R
PeMs Medulla Corta(
C-orto( Medulla Pelvis
I).,ramid Llreter Capsule
Nephron Urethra Ureter
3.2 l- met llr,i n aru Sy,ste m int
Mgtt8 'lhe diagram shows the
Iongitudinal section of ahuman kidney.
What are P, Q and R?
D
Which pan of the humanexcretory system stores
urine formed by thekidneys3A PelvisB UreterC UrethraD Llrinary bladder
PAPER I ,
M
xY
Z
{Jrine producedis expelled from
What are parts 4 Q, R and S?
What will happen if theureters are blocked?A Urea cannot enter the
kidneys.B Urine cannot enter the
kidneys.C Urine cannot enter the
body caviryD Urine cannot enter the
urinary bladder
The diagram shows theIongitudinal section of a
human kidney.
Which statements arecorrect?
I K is dark-red in colour.[[ I transports
deoxygenated bloodfrom the kidney back tothe heart.
III M connects the kidneyto the urinary bladder.
A I and II onlyB I and III onlyC II and III onlyD I, ll and III
The statement describes a brief mechanism ofthe excretorysystem.
Urine formed in thekidneys is sent to theurinary bladder by theA urelerB urethraC tubulesD renal anery
Which of these substancesare found in the urine of ahealthy person?I l]reaII Clucose
III ProteinIV Dxcess waterA Iand II CB I and IV D
II and IIIIII and IV
Which of these can causekidney failure?I Drugs or chemicalsII High blood pressure
III Infections caused bymicroorganisms
A I and II onlyB I and III onlyC II and III onlyD I, II and III
Ifboth kidneys ofa personfail and kidney donors arenot available, the personwould have toA use a dialysis machine
to filter the blood
13
74
15
16
P fiKidney Ureter Urinarv bladder Urethra
Kidney Urethra Urinary bladder Ureter
Ureter Kidney Urethra Urinary bladder
Urethra Kidney Ureter Urinary bladder
@
exercise more to makethe kidneys work againtake herbal medicine torejuvenate the kidneysundergo bloodtransfr:sion to obtainnew blood
17 What is dialysis?A It is a type ofblood
transfusion using a
machine.B It is a chemical method
of cleaning the blood ina machine.
C It is the method ofregenerating bloodusing a machine.
D It is the process offiltering and cleaningthe blood using amachine
18 'lhe following are steps
f;11 in the workings of a* haemodialvsis machine.
R - Blood from r
' patrent ls pr.l'into a dialysrconlalnl
,rl',.. of semi-"r :r - (ubings.
S , The dialthe wast
,r away lic'lr'. and is d
T - A dialvsr
o S
A
B
C
D
P*
Anange the steps in thecorrect order of oPeration.A P+ Q+R >S>TB R+T+P+Q+SC Q+T+P+R+SD T+P>R>Q+S
19 Which statements are trueabout the human kidneYs?
I Kidney failure leads toan accumulation oftoxic excretory waste inthe blood.
Il Ce(ain drugs orchemicals can damagethe function of kidneYs.
III Kidney failure will lead
to death.A I and II onlYB I and III onlYC II and III onlYD I, ll and III
_3.3rUggelbttii&PlgutA20 Which ofthese substances
are excretory Products ofplants?
I Latex
II CumsIll Resins
A I and II onlyB I and III onlyC II and III onlyD l, lt and tll
21 Which of these statements
is true about excretion inplants?A Plants do not produce
excretory products.
Plants have specialorBans to eliminateexcretory Products.Plants eliminateexcretory productsthrough transpiration.Plants store excretoryproducts in their roots.
22 Which of the following are
matched?
leaves ofthe poppyplant
Caffeine
Stem ofthe rubbertree
Latex
Bark ofthecinchonatree
Quinine
K
AB
CD
,l and ( only.l and L onlyK and I onlyl,Kar.dL
Which of these plant parts
contains an excretoryproduct which is used as
oil?A Resin ofthe pine tree
B Stem of the rubber tree
C Leaf ofthe EucalyptustIee
D llower ofthe tobaccoplant
23
24 Excess water and carbondioxide can be removed
from plants thtough theA stomaB xylemC phloemD chloroplast
Which of these is not a
method used by plants toeliminate their excretoryproducts?A Removal of water
through the xylemvessels in the stem
B Elimination of excretoryproducts such as waterthrough the lenlicels inthe stemElimination of excretoryproducts such as carbondioxide through thestoma of leaves
Depositing the waste
products in Ieaves andother parts ofthe Plantswhich will die or dropoff
relAnswer all questions.
I The diagram shows the human urinary system.
Q:
S:
(u) (i) Name the parts labelled p, e, R and S.
P:
(ii) What is rhe funcrion of 7l
(b) Name the blood vessel that
(i) carries blood conraining excretory products into the kidneys,
(ii) carries blood relatively free from excretory products out ofthe kidneys.
(.) (i) Describe what happens to the body when both kidneys fail.
(ii) What is needed by a person whose kidneys are not functioning?
R.
I
2 the following diagram shows a longitudinal section through a human kidney'
Y
--"'--6
(u) (i) Complete the diagram by drawing and labelling the following parts of a kidney
Cortex Medulla Pelvis
(ii) Label, with an X, the parr that will carry the udne from the kidneys to a bladder
(iii) State what anows P and Q mean.
P:
Q:
(b) (i) Describe the shape of the kidneys.
(ii) why is the pan labelled y important?
(c) (i) How is rhe dialysis machine similar to the functional units of the kidneys?
(ii) State two functions of the kidney in the human body.
1
lt
3 The diagram shows a patient in a hospital undergoing a treatmenr.
What treatment is the patient unde€oing?(u) (i)
(ii) lxplain why the patient needs this treatment.
(iii) Name the instrument used in the treatment.
(b) State two methods of maintaining the health of the organ treated in rhe diagram.
1
(c) Besides the treatment shown in the diagram, what other altemative does the patient have?