nervous coordination

Question 1

what’s a taxis?🦋

Answer 1

response that involves movement in a specific direction

Question 2

what’s a kinesis?🦒

Answer 2

response that involves movement in random direction.
both speed and frequency of direction change increase

Question 3

2 factors which increase heart rate?🩷❤️🧡💛💚🩵💙💜🖤🩶🤍🤎💔❤️‍🔥❤️‍🩹❣️💕💞💓💗💖💘💝

Answer 3

changes in pH
changes in blood pressure

Question 4

how is the resting potential maintained?💗

Answer 4

by the sodium-potassium pump which moves sodium ions out of the axon.
this creates a gradient with more sodium ions outside the axon
(membrane is not permeable to sodium)

Question 5

when an action potential is triggered, what happens to the axon membrane?
💐🌷🌻🌼🌸

Answer 5

it becomes depolarised
the membrane is more permeable to sodium ions so they diffuse in down the gradient

Question 6

what’s saltatory conduction?🧚🏼

Answer 6

in myelinated neurones when the impulse jumps between nodes of ranvier

Question 7

nervous system def?🌠

Answer 7

uses action potentials in neurones to transfer electrical signals from the receptors to the brain and spinal cord (coordinators) and the to effectors (muscles or glands)

Question 8

name and excitatory and inhibitory neurotransmitter🤍

Answer 8

e: acetylcholine
i: noradrenaline