key wroeds

Question 1

what is a cell?

Answer 1

basic unit of living material

Question 2

what are tissues?

Answer 2

groups of cells joint together to carry out a particular task

Question 3

what is an organ?

Answer 3

a collection of tissues joined together to carry out a specific function

Question 4

what is an electron microscope?

Answer 4

a powerful microscope needed to see inside cells

Question 5

what is a photomicrograph?

Answer 5

a photograph taken of an object magnified using a microscope

Question 6

what is an organelle?

Answer 6

tiny body inside a cell

Question 7

what is protoplasm?

Answer 7

refers to anything inside cell boundary

Question 8

what is cytoplasm?

Answer 8

refers to anything inside cell boundary and outside nucleus

Question 9

what is a nucleus?

Answer 9

the central part of the cell which is enclosed in a membrane and it contains genetic material

Question 10

what is metabolism?

Answer 10

sum of all chemical reactions that involves using or releasing energy from chemical substances

Question 11

what is the chromatin network?

Answer 11

dark tangled mass seen in nucleus of resting cell

Question 12

what is ribonucleic acid?

Answer 12

nucleic acid found in both cell and nucleus which is responsible for manufacture of cell proteins

Question 13

what are chromosomes?

Answer 13

long threads of DNA and protein seen in a dividing cell which contains genetic material

Question 14

what is deoxyribonucleic acid?

Answer 14

nucleic acid found only in chromatin network and chromosomes

Question 15

what are centrioles?

Answer 15

organelles that play an important part in spindle formation during cell division

Question 16

what are mitochondria?

Answer 16

rod-shaped bodies scattered in cytoplasm concerned with energy release

Question 17

what are Cristae?

Answer 17

folds of inner layer of mitochondrial membrane

Question 18

what does ATP stand for?

Answer 18

adenosinetriphosphate

Question 19

what does ADP stand for?

Answer 19

adenosinediphosphate

Question 20

what is ATP?

Answer 20

chemical in mitochondria capable of trapping and storing energy to supply cell when its needed

Question 21

what is ADP?

Answer 21

chemical left over after ATP has released its stored energy to do work

Question 22

what is diffusion?

Answer 22

passage of molecules from a high concentration to a low concentration

Question 23

what is osmosis?

Answer 23

passage of water molecules from a region of high concentration of water molecules to one of low concentration through a partially permeable membrane

Question 24

where does arterial blood flow?

Answer 24

from heart and is usually dark red oxygenated blood

Question 25

what is venous blood?

Answer 25

flows towards heart and is usually dark red deoxygenated blood

Question 26

what is collagen?

Answer 26

structural protein in the form of fibres for extra strength

Question 27

what does the CNS consist of?

Answer 27

brain and spinal cord

Question 28

what is the autonomic NS?

Answer 28

part of NS and responsible for controlling internal organs

Question 29

what are antagonistic muscles?

Answer 29

1 muscle or sheet of muscles contracts while the opposing muscle or sheet relaxes

Question 30

what is homeostasis?

Answer 30

the process of maintaining a constant internal environment despite changing circumstances

Question 31

what is myelin?

Answer 31

an insulating sheath around many nerve fibres formed of proteins and phospholipids which increases the speed of nerve conduction

Question 32

what is catabolism?

Answer 32

breaking down of molecules into smaller units releasing energy

Question 33

what Is anabolism?

Answer 33

building up of complex molecules using the energy released in catabolism