Stimuli and Response (Topic 6A)

Question 1

what are the two types of responses of animals

Answer 1

taxic response
kinetic response

Question 2

a taxic response is…

Answer 2

directional movement

Question 3

a kinetic response is…

Answer 3

non directional movement

Question 4

a positive tropism is when a plant…

Answer 4

positive tropism

Question 5

a negative tropism is when a plant…

Answer 5

grows away from stimulus

Question 6

the tropism associated with light is called…

Answer 6

photostropism

Question 7

the tropism associated with gravity is called…

Answer 7

gravitopism

Question 8

what is the chemical associated with tropisms?

Answer 8

auxin

Question 9

how does auxin causes cell elongation?

Answer 9

loosens cell walls

Question 10

auxin in ____ concentrations _____ growth in roots

Answer 10

high
inhibits

Question 11

auxin _____ growth in shoots

Answer 11

stimulates

Question 12

Auxin is also referred to as

Answer 12

IAA

Question 13

Response to light:
IAA moves to the _____ side of the shoot, cells elongate and grow ____ _____

Answer 13

shaded
towards light

Question 14

Response to light:
IAA moves to the _____ side of the roots, cell growth is inhibited and grow ____ from _____

Answer 14

shaded
away
light

Question 15

Response to gravity:
IAA moves to the _____ side of the shoot and plant grows upwards

Answer 15

lower

Question 16

Response to gravity:
IAA moves to the _____ side of the root, growth is _____ and plant grows downwards

Answer 16

lower
inhibited

Question 17

receptors…

Answer 17

detect stimuli

Question 18

effectors….

Answer 18

bring about response to stimuli

Question 19

how does an impulse travel to an effector to cause a response

Answer 19

1. stimulus
2. receptor
3. sensory neurone
4. co-ordinator (brain)
   5.motor neurone
5. effector
6. response

Question 20

simple reflexes are…

Answer 20

rapid and involuntary

Question 21

simple reflexes go through the….

Answer 21

spinal cord

Question 22

give the pathway of an impulse through a reflex arc

Answer 22

1. stimulus
2. receptors
3. sensory neurone
4. CNS
5. motor neurone
6. effectors

Question 23

pacinian corpuscle detect …..

Answer 23

chemical stimuli

Question 24

pacinian corpuscle are _______ found in your skin

Answer 24

mechanoreceptors

Question 25

pacinian corpuscles contain a…

Answer 25

sensory nerve ending that is wrapped in layers of connective tissue lamellae

Question 26

when a pacinian corpuscle is stimulated…

Answer 26

lamella are deformed and press on sensory nerve ending

Question 27

when sensory nerve endings are pressed…

Answer 27

its cell membrane stretches, deforming the stretch mediated sodium ion channels

Question 28

when stretch mediated sodium ion channels open… creating....

Answer 28

the sodium ions diffuse into the cell creating generator potential

Question 29

when the generator potential reaches a threshold….

Answer 29

it triggers an action potential

Question 30

sensory reception is

Answer 30

function is sense organs

Question 31

sensory perception is…

Answer 31

making sense of information from receptors

Question 32

what are the two types of photoreceptors in the eye?

Answer 32

rods and cones

Question 33

where are photoreceptors found in the eye?

Answer 33

back of the retina

Question 34

what is the photosynthetic pigment called that is involved with rods?

Answer 34

rhodopsin

Question 35

what is the photosynthetic pigment involved with cones?

Answer 35

iodopsin

Question 36

rods give information in….

Answer 36

black and white

Question 37

where are rods located?

Answer 37

in the peripheral of the retina

Question 38

how many rods connect to a bipolar neurone?

Answer 38

many

Question 39

rods have ____ sensitivity to light

Answer 39

high

Question 40

rods have ___ visual acuity

Answer 40

low

Question 41

why do rods have low visual acuity?

Answer 41

because many rods connect to one BP neurone

Question 42

where does the bipolar neurone take the impulse to?

Answer 42

the brain

Question 43

cones give information in….

Answer 43

colour

Question 44

cones are located in the…

Answer 44

fovea

Question 45

how many cones connect to one bipolar neurone?

Answer 45

1

Question 46

cones have ___ visual acuity

Answer 46

high

Question 47

what kind of light do rods work best in?

Answer 47

dim light

Question 48

what kind of light do cones work best in?

Answer 48

bright

Question 49

how do cones provide colour information?

Answer 49

different types of cones respond to different wavelengths of light

Question 50

cones have ___ sensitivity to light

Answer 50

low

Question 51

what is the average resting heart rate?

Answer 51

72bpm

Question 52

the sympathetic nervous system is responsible for…

Answer 52

increasing heart rate and controls HR during exercise

Question 53

the parasympathetic nervous system is responsible for…

Answer 53

decreasing heart rate and controls heart rate at rest

Question 54

what are the two centres responsible for heart rate in the medulla oblongata?

Answer 54

cardioinhibitory cardioacceleratory

Question 55

the cardioacceleratory centre ____ HR

Answer 55

increases

Question 56

the cardioacceloratory centre ____ HR

Answer 56

increases

Question 57

the cardioinhibatory and cardioacceleratory centre connect to the…

Answer 57

SA node

Question 58

baroreceptors detect…

Answer 58

changes in blood pressure

Question 59

chemoreceptors detect..

Answer 59

changes in pH

Question 60

sympathetic neurone releases

Answer 60

noradrenaline

Question 61

parasympathetic neurone releases…

Answer 61

acetylcholine