Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science > Form 4 Term 1 Biology Unit 15 - Cells Membranes and Movement > Flashcards

Form 4 Term 1 Biology Unit 15 - Cells Membranes and Movement Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Osmosis

A

MOVES WATER MOLEULeS
DOESNT NEED EERGY
net movement of water molecules from a region of high water potential to area of low water potential through a partially permeable membrane

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

diffusion

A

net movement of particles from areas of high concentration to area of low concentration
eg packed together to spread out
solid diffusing out to gas

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

active transport

A

movement of particles through a cell membrane from a region of lower concentration to an region of higher concentration using energy

process requires energy to move molecules against concentration gradient (like up a hill)

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

photosynthesis

A

process by which plants and some bacteria synthesis food molecules which they use for respiration

process needs energy - usually from the sun

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

equation for photosynthesis

A

carbon dioxide plus water [sunlight and chlorophyl] - equals glucose and oxygen

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

what do you need in a cell for photosynthesise

A

chlorophyl

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

respiration

A

chemical processes that break down nutrient molecules in living cells to release energy

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

what carries oxygen arounds you blood

A

haemoglobin

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

gas exchange

A

process where gas and oxygen is exchanged for carbon dioxide across a membrane surface

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

main part of animal cells

A

nucleus, cell membrane. cytoplasm

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

animal cells do not have ….

A

a cell wall

no chloroplast - so no photosynthesis

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

living organisms have 7 characteristics

A

MRSGREN

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

what’s only in plant cells not animal cells

A

cell wall, chloroplast, vacuole

plus: cell membrane, nucleus and cytoplasm

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

cytoplasm

A

where chemical reactions happen - contains organelles

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

nucleus

A

contents the genetic material - DNA

controls the entire cell

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

cell membrane

A

controls the movement of substances in and out of the cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

cell wall

A

made from cellulose and strengthens the cell and supports the plant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

mitochondria

A

where energy is released in respiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

ribosomes

A

where protein synthesis happens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

chloroplast

A

contains green pigment chlorophyll which absorbs the light in photosynthesis

21
Q

what is tissue

A

made of group of cells of similar structure an function

22
Q

examples of tissue

A

muscles, intestine, lining of your lungs

23
Q

organs

A

made of different tissues all working together

24
Q

example of organs

A

heart lung stomach brain

leaf or root

25
Q

example of organ system of different organs working together

A

digestive system
respitatory system
nervous systems
reproductiive systems

26
Q

3 processes contribute to movement of substances and out of cells

A

Diffusion
Osmosis
Active Transport

27
Q

examples of diffusion in your body

A

respiratory system - high CO2 in blood as it returns to lungs - then get oxygen and returns to body with high levels of CO2
SUBSTANCES MOVED WITH DIFFUSION - CO2 oxyegnet water food, urea , wastes
DOESNT NEED ENERGY

28
Q

example of active transport in plants

A

NEEDS ENERGY active transport when plant roots “soak up” mineral ions it needs from the soil around it

29
Q

example of active transport in animals/humans

A

NEEDS ENERGY

movement of glucose molecules from the gut into intestinal cells and then into the blood.

30
Q

gas exchange system in humans or animals

A

physical process in which gas and oxygen (need for respiration) is EXCHANGED for carbon dioxide (produced in respiration )

means the EXCHANGE of oxygen gas for Carbon dioxide gas - uses you diaphragm and other muscles to breath

INHALING OXYGEN
EXHALE /expiration of CO2 - relaxing of diaphragm

31
Q

respiration is a chemical process

A

release HEAT energy - hot breath - exothermic process

happens in your cells - different to breathing

32
Q

oxygen moves out of the capillaries by the process of

A

diffusion

33
Q

how do capillaries enable sustances to pass through their wall s

A

capillaries have thin walls - they are only one cell thick

34
Q

what organs and structures are involved in the gas exchange system (start at top of body )

A 
nose
mouth
trachea
bronchi
bronchioles
alveoli
lungs
intercostal muscles
the pleural membrane
35
Q

what protects the lungs

A

RIBS AND RIB MUSCLES

36
Q

what organs are used in the human respiratory system

A

lungs and heart

37
Q

what is the chemical equation for aerobic respiration

A

glucose + oxygen = carbon dioxide + water _ energy

C6H1206 + 6O2 = 6CO2 + 6 H20 + energy released

38
Q

describe how blood circulates starting with the heart

A

heart - arteries - capillary network within an organism - vein - heart

39
Q

3 types of blood vessels

A

arteries =- carry blood from heart - thick muscles walls - strong because of presurre from heart

veins - carry blood from organs towards the heart - thinner with valves to prevent back flow of blood

capillaries - make up most of the body blood vessels - network in all tissue - tiny with very thin walls

40
Q

in your heart what do left and right atria (atrium) do

A

collect the blood going FROM your lungs and body

A for Atrium A for AWAY FROM

41
Q

in your heart what do the left and right ventricles do

A

VENTRICLES - TO THE HEART (T = TOWARDS)

have thick muscular walls for pumping blood TO the lungs and from the body

42
Q

what do valves do in your heart

A

stop the blood flowing back into the auricles - means keep the blood flowing the one way like a circuit

43
Q

4 types of things in your blood

A

platelets
plasma
white blood cells
red blood cells

44
Q

what carries oxygen in your blood

A

the haemoglobin in your red blood cells

45
Q

what do white blood cells do

A

carry antibodies to fight disease

46
Q

what is plasma in your blood

A

removes the waste Co2 , carries water

47
Q

what do platelets your blood do

A

cause your blood to clot

48
Q

there is a metal in your blood. What is it and where is it

A

Iron

in the haemoglobin

49
Q

explain difference gas exchange, respiration and breathing

A

gas exchange is the exchange of Co2 to Oxygen

respiration is a chemical process in your cells

breathing is the physical act of inhaling and exhaling using your nose mouth diaphragm etc

Science (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions