excretion Flashcards

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1
Q

why glucose is not normally found in urine

A

it is reabsorbed in the proximal convoluted tubules

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2
Q

suggest two situations in which urine volume ids likely to be low

A

dehydration, during hot weather

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3
Q

name the hormone involved in lowering the volume of urine

A

anti diuretic hormone (ADH)

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4
Q

name one part of the nephron affected by the hormone ADH

A

collecting duct

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5
Q

explain excretion

A

removal of metabolic waste form a cell

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6
Q

explain homeostasis

A

maintain a constat internal environment

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7
Q

name one excretory organ in plants

A

leaf

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8
Q

where does the process of filtration occur

A

cortex

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9
Q

explain the importance of blood entering the glomerulus under pressure

A

force filtered

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10
Q

state two reasons why there are many capillaries surrounding the proximal consulted tube loop of hence and distal converted tube of the nephron

A

reabsorption, secretion

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11
Q

describe how ADH affects the volume of urine

A

more water is reabsorbed

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12
Q

name the structure through which the urine travels tot he bladder

A

ureter

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13
Q

which structure in the skin is involved in vasoconstriction

A

arteriole

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14
Q

describe in detail the role of vasoconstriction in temperature regulation

A

in cold conditions, arterioles narrow and less heat is loss

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15
Q

which structure in the skin is involved in piloerection

A

hair

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16
Q

what structure in the skin is involved in both excretion and temperature regulation

A

sweat gland

17
Q

name the excretory product prduced by the sweat gland

A

sweat

18
Q

humans can generate their own heat and regulate their own body temperature, what name is given to such organisms

A

endotherm

19
Q

name two other systems in which the skin has a role

A

nervous, defence

20
Q

state the precise location in the body where urea is made

A

liver

21
Q

name the food biomolecule from which urea is derived

A

protein

22
Q

in which part of the kidney is the Bowmans capsule located

A

cortex

23
Q

in which part of the kidney is the loop of hence located

A

medulla

24
Q

what chance in blood composition triggers the secretion of ADH

A

increased salt concentration

25
Q

name the endocrine gland in epoch ADH s produced

A

hypothalamus

26
Q

explain egestion

A

removal of undigested waste

27
Q

suggest how excretion may occur in simple organisms such as amoeba

A

diffusion

28
Q

name two excretory proud cats other than water of mammals

A

carbon dioxide, urea

29
Q

for each product give a location in the body in which it is proud ced

A

carbon dioxide - lungs
urea - liver

30
Q

suggest two structures in flowering plants which play a role in excretion

A

stomata, lenticels

31
Q

define piloerection

A

hair stands up, this traps air close to the skin which reduces heat loss

32
Q

define vasoconstriction

A

blood vessels narrow reduction heat loss

33
Q

name the blood vessel that supplies blood to the kidney

A

renal artery

34
Q

from which blood vessel does renal artery arise from

A

aorta

35
Q

in which cavity of the body is kidney located in

A

abdomen

36
Q

name one substance excreted in urine

A

salt

37
Q

give a feature of a kidney which indicates that it is an exocrine glands

A

ducts