immunology

Question 1

reflex arc

Answer 1

stimuli detected in the receptor, elec impulse down sensory neurone towards cns
synapse with relay neuron
chem neurotransmitters diffuse across synapse
elec impulse goes down relay an synapses with motor
diffuse across
towards effector with triggers an immune response.

Question 2

what do your eyes do in bright light and dim light

Answer 2

in bright lights
circular contract radial relax pupil is smaller
dim
circular relax radial contract pupil larger

Question 3

what happens to the eye when looking at objects far away and close

Answer 3

far away
cillary muscles relax suspensory ligament become taught 
lens flattens less light is refracted
close up
cillary contract suspensory slacken

Question 4

what can long and short sighted people need

Answer 4

short lens bends light too much

long doesn’t bend light enough

Question 5

what does adrenaline and insulin do

Answer 5

adrenaline triggers fight or flight reaction, created in the adrenal glands
insulin controls blood sugar levels, by converting glucose into glycogen.

Question 6

phagocytes

Answer 6

phagocytosis non specific immune response where it is engulfed and killed

Question 7

lymphocytes

Answer 7

produce antibodies which bind to pathogens and memory cells remain in the blood.

Question 8

what does your body do when you are hot

Answer 8

blood vessels move towards skin , vasodilation
heat is transferred to water which you sweat out
hairs lie flat

Question 9

what does homeostatis control

Answer 9

water content and your heat levels

Question 10

what does your body do when it is cold

Answer 10

hairs stand on there end which trap insulating layers of air
shiver increases your rate of respiration.
blood vessels move away vasoconstriction

Question 11

homeostaris

Answer 11

maintaing of constant internal conditions