mitosis/stem cells/the nervous system

Question 1

mitosis

Answer 1

Mitosis is a type of cell division in which a cell copies itself and divides into two identical daughter cells.

Question 2

interphase

Answer 2

The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis.

Question 3

prophase

Answer 3

the nucleus starts to break down and spindle fibres appear

Question 4

metaphase

Answer 4

the chromosomes are lined up on the spindle fibres across the middle of the cell

Question 5

anaphase

Answer 5

the chromosome copies are split up and moved to either end of the cell

Question 6

telophase

Answer 6

a membrane forms around each set of chromosomes to form nuclei

Question 7

cytokenesis

Answer 7

a cell surface membrane forms to separate the 2 cells

Question 8

growth

Answer 8

increase in size as a result in an increased number of cells

Question 9

stem cells found in plants

Answer 9

meristems

Question 10

stem cells found in the embryo

Answer 10

embryonic stem cells

Question 11

stem cells used for tissue growth and replacement of damaged cells

Answer 11

adult stem cells

Question 12

what makes up the nervous system

Answer 12

the central nervous system, the spinal chord

Question 13

neurotransmission

Answer 13

the transmission of impulses

Question 14

direction of impulse through a receptor cell

Answer 14

dendrite (receives impulses from receptor cells), dendron, cell body, axon, axon terminals (passes impulses to other neuron)

Question 15

motor neuron

Answer 15

carries impulses to the effectors

Question 16

effectors

Answer 16

carries out an action that is recieved from the impulse

Question 17

relay neuron

Answer 17

found in the spinal cord, where they link motor and sensory neurones

Question 18

what do reflex arcs do

Answer 18

bypass parts of the brain involved with processing information to create quicker responses

Question 19

synapses

Answer 19

small gaps between neurones

Question 20

why are synapses used

Answer 20

to keep the flow of impulses in one direction

Question 21

what is the direction of the reflex arc

Answer 21

the reflex arc goes straight to the spinal cord and then to the muscle