cells

Question 1

what cells structure are inside an animal cell

Answer 1

cell membrane, cytoplasm, nucleus, vacuoles

Question 2

what are the characteristics that help animal cells

Answer 2

denser cytoplasm to allow more dissolved substance and organelles
store food in form of glycogen
irregular shape

Question 3

what is the use of cell membrane

Answer 3

to allow substances to go in and out due to permeable characteristics made of protein

Question 4

uses of cytoplasm

Answer 4

where chemical reactions take place to keep cell alive

Question 5

use of nucleus

Answer 5

controls all activity in a cell and contain genetic information surrounded by nuclear membrane

Question 6

what is a vesicle

Answer 6

membrane bond space containing food and water

Question 7

what is a cell wall

Answer 7

fully permeable , gives plant shape and is made of cellulose

Question 8

what is chloroplast

Answer 8

contains chlorophyll to absorb sunlight

Question 9

what is a vacuole

Answer 9

contains water and dissolve substances, help cell mains shape

Question 10

what organelles do plant hv

Answer 10

cell membrane, cell wall, chloroplast, vacuole, nucleus

Question 11

do animal cells have vacuoles, why or why not

Answer 11

it is temporary for digestion or excretion

Question 12

what is the use of mitochondria

Answer 12

produce energy through the process of respiration
spherical and rod like shape
present is all cells except prokaryotes

Question 13

which have nuclear membrane: prokaryotes or eukaryotes

Answer 13

eukaryotes

Question 14

what are ribosomes

Answer 14

made of RNA
read rna &synthesis protein
found in cytoplasm on endoplasmic reticulum ER
combines amino acid required to make specific protein

Question 15

explain protein synthesis

Answer 15

MRNA (messenger RNA) from nucleus move to ribosomes
ribosomes build amino acid chain
when protein is completed ,RER pinches off a vesicle
vesicles moves to membrane from Golgi apparatus
protein used in cell

Question 16

what are tissues

Answer 16

similar cells working tgt to carry out a similar function

Question 17

what are organs

Answer 17

made of tissues that work tgt towards 1 function

Question 18

what is a system

Answer 18

grp of organ with related function working tgt

Question 19

cell growth meaning

Answer 19

when cell increases in size/ mass and quantity

Question 20

cell specialisation meaning

Answer 20

development of cells to hv specific role and structure

Question 21

process of specialisation

Answer 21

cell divides in 2, where 1 become smth and the other continues splitting

Question 22

what is / function of ciliated cells

Answer 22

tiny hair called cilia
found along reparatory tract and oviduct
move mucus that contains dust and bacteria in trachea and bronchi
mucus is secreted by goblet cells

Question 23

what are epithelial cells

Answer 23

goblet cells

line cavities in body

Question 24

what is the palisade mesophyll and how is it specialised

Answer 24

do photosynthesise
packed with chloroplast
elongated shape and tightly packed tgt

Question 25

how is the rbc specialised

Answer 25

has no nucleus to make space for haemoglobin biconcave to increase surface area flexible to squeeze through blood vessels

Question 26

where is rbc found and what is it uses

Answer 26

bone marrow; transport oxygen

Question 27

what does smoking do to rbc

Answer 27

makes it carbon haemoglobin, which contains carbon monoxide. this make it difficult to unbind and takes up spaces so less space of oxygen

Question 28

how is root hair cells specialised

Answer 28

long protrusion to increase surface area hair like structures contains mitochondria to provide energy for uptake of minerals

Question 29

what is the use of root hair cells

Answer 29

to absorb water and minerals, anchor plant

Question 30

how is xylem vessels specialised

Answer 30

long thin cells | lignin provides strength and makes vessel waterproof

Question 31

what is the use of xylem vessel

Answer 31

transport water and minerals from root to leaves and to support plant

Question 32

difference between phloem and xylem vessels

Answer 32

phloem carries food from leaf to other parts and is located on outer side of vascular bundle where else xylem vessels carry water from root to leaves

Question 33

what are the 3 types of nerve cells

Answer 33

motor neuron, sensory neuron and replay neuron

Question 34

what is the use of nerve cell

Answer 34

specialised for conduction of electrical impulses

Question 35

true or false: xylem vessels has no wall, cytoplasm or nucleus

Answer 35

true

Question 36

how is nerve cells specialised

Answer 36

they hv myelin sheath that speed up conduction of impulses and makes neuron works like an insulted wire

Question 37

what is the use or motor neuron

Answer 37

carry impulses frm brain to muscle

Question 38

what is the use of sensory neuron

Answer 38

carry impulses from receptors to brain

Question 39

what is the use of replay neuron

Answer 39

carry impulses between the brain and spinal cord

Question 40

what are the reproductive cells

Answer 40

sperm and egg cells contains genetic info from parents to ensure continuation of species has only 1/2 number of normal cells fuse tgt to produce a zygote

Question 41

where is sperm and egg cells formed

Answer 41

by gonads