Nerevs And Hormones

Question 1

nervous system 3

Answer 1

what allows you to respond to changes in your environment and co-ordinate actions
made up of neurones

Question 2

stimilus

Answer 2

changes in your environment u might need to respond to

Question 3

receptors 3

Answer 3

detect stimuli and change the stimulus energy into electrical impulses
found in sense organs

Question 4

eyes

Answer 4

sensitive to light

Question 5

ears

Answer 5

contain receptors sensitive to sound and balance receptors sensitive to change in position

Question 6

nose

Answer 6

smell receptors sensitive to chemical stimuli

Question 7

skin 4

Answer 7

receptors sensitive to touch pressure pain and tempchange

Question 8

CNS 4

Answer 8

where all the information from the receptors is sent
where reflexes and actions are coordinated
consists of brain and spinal cord
neurons transmit information as electrical impulses to the cns

Question 9

effectors3

Answer 9

muscles or glands
instructions from the cns are sent along neurons to effectors
effectors respond to nervous impulses

Question 10

sensory neurones

Answer 10

nerve cells that carry signals as electrical impulses from the receptors to the cns

Question 11

relay neurons 2

Answer 11

nerve cells that carry signals from sensory neurons to motor neurons
found in cns

Question 12

motor neurons

Answer 12

nerve cells that carry signals from the cns to the effectors

Question 13

synapses

Answer 13

connection between two neurons
nerve signal is transferred by chemicals which diffuse across the gap
chemicals then set off a new electrical signal in the next neurone

Question 14

reflexes

Answer 14

fast automatic response to stimuli

bypass your brain

Question 15

homeostasis controls 4

Answer 15

temperature water content

ion content blood glucose content

Question 16

controlling body temp

Answer 16

37°C bc that’s the temp enzymes work at best

brain is ur thermostat it’s sensitive to blood temperature in the brain

Question 17

controlling ion content 2

Answer 17

some ions lost as sweat

the kidneys get rid of ions from theblood for urine

Question 18

controlling water3

Answer 18

skin as sweat
lungs as breath
kidneys as urine

Question 19

controlling blood glucose 2

Answer 19

normal metabolism of cells removes glucose from the blood

exercise removes glucose

Question 20

hormones 3

Answer 20

chemical messengers which travel in the blood to activate target cells
produced and secreted by glands
carried in the blood plasma

Question 21

menstrual cycle

Answer 21

build up of protective lining in the womb for f.egg
release of egg from ovaries
breakdown of uterus lining if no f.egg

Question 22

FSH4

Answer 22

follicle stimulating hormone
pituitary gland
causes egg to mature in one of the ovaries
stimulates the ovaries to produce oestrogen

Question 23

oestrogen

Answer 23

produced in the ovaries
causes pituitary gland to produce LH
inhibits further release of FSH

Question 24

LH

Answer 24

luteinising hormone
pituitary gland
stimulates release of an egg

Question 25

oestrogen reducing fertility

Answer 25

prevent egg release | consistabtly high levels of oestrogen prevents FSH therefore the maturation of an egg and so no egg is released

Question 26

progesterone reducing fertiility

Answer 26

stimulates the production of thick cervical mucus preventing the sperm getting to the egg

Question 27

problems with fertility drugs 3

Answer 27

they don't always work expensive to repeat the process to many eggs stimlated meaning multiple pregnancies

Question 28

IVF 5

Answer 28

1. FSH LH given to stimulate egg maturation 2. eggs collected from ovaries 3. eggs fertilised in lab 4. f.eggs grow into embryos 5. one or two embryos transferr3d back to uterus

Question 29

IVF problems 3

Answer 29

strong reaction to hormones. vomiting increased cancer risk multiple births high risk of stillbirth/miscarriage

Question 30

plants needs

Answer 30

light to make food | water to survive

Question 31

auxin

Answer 31

plants hormone that controls growth near tips of shoots amd roots moves backwards to stimulate the cell elongation process

Question 32

phototropism

Answer 32

plant growth in response to light

Question 33

gravitropism

Answer 33

plant growth in response to gravity

Question 34

shoots grow towards light

Answer 34

when a shoot tip is exposed to light more auxin accumulates on the shades side making the shades side grow faster causing the plant to grow towards the light

Question 35

shoots grow away from gravity

Answer 35

gravity produces an uneven distribution of auxin audio in the tip with more on the lower side making the plant grow up

Question 36

roots towards gravity

Answer 36

more auxin will accumulate on its lower side when a root grows sideways extra auxin on the lower side inhibits it's its growth causing cell elongation on the upper side making the root bend downwards

Question 37

roots towards moisture

Answer 37

more auxin on the side with more moisture inhibiting growth on that side causing root to bend in that direction

Question 38

use of plant hormones 2

Answer 38

1.selective weedkillers made of hormones that only affect the broad leave plants 2.rooting powders plant cuttings will grow roots rapidly in soil