B2 Biology - Cells, organs and tissues

Question 1

What is a nucleus?

Answer 1

Contains genetic material, controls activities of cell

Question 2

what is cytoplasm?

Answer 2

where most chemical reactions occur, contains enzymes

Question 3

what is mitochondria?

Answer 3

where reactions for respiration happen

Question 4

cell membrane?

Answer 4

holds cell together

controls what goes in and out of cell

Question 5

Ribosomes?

Answer 5

proteins made in cell

Question 6

Chloroplasts?

Answer 6

where photosynthesis happens

contains chlorophyll

Question 7

what is yeast?

Answer 7

microorganism

Question 8

which cell has no nucleus ?

Answer 8

bacterial cells

Question 9

what is diffusion (scientific explanation)

Answer 9

the spreading out of particles from a high concentrated area to a low concentrated area

Question 10

Diffusion:

the bigger the difference in concentration…

Answer 10

the faster the rate of diffusion

Question 11

what substances can pass through cell membrane?

Answer 11

amino acids
glucose
oxygen

Question 12

why do red blood cells have a concaved shape?

Answer 12

bigger surface area to absorb oxygen

Question 13

what happens to the egg membrane when fused with sperm?

Answer 13

structure changes to stop more sperm coming in

Question 14

what is differentiation?

Answer 14

process by which cells become specialised for particular job

Question 15

what is tissue?

Answer 15

group of similar cells that work to do particular function

Question 16

muscular tissue?

Answer 16

contracts to move whatever is attached to it

Question 17

Glandular tissue?

Answer 17

makes and secretes chemicals like enzymes and hormones

Question 18

Epithelial tissue?

Answer 18

covers parts of body eg. inside of the gut

Question 19

muscular tissue within stomach?

Answer 19

moves stomach wall to churn up food

Question 20

glandular tissue within organs?

Answer 20

makes digestive juices to digest food

Question 21

Epithelial tissue within stomach?

Answer 21

covers outside and inside of stomach

Question 22

what do glands do?

Answer 22

produce digestive juices

Question 23

what does the stomach do?

Answer 23

digest food

Question 24

what does the liver do?

Answer 24

produces bile

Question 25

small intestine?

Answer 25

absorbs soluble food molecules

Question 26

large intestine?

Answer 26

absorbs water from indigestive foods, leaving faeces