topic 7

Question 1

what does myogenic mean?🏄🏼‍♀️

Answer 1

contraction initiated by muscles not impulses

Question 2

cone cells🦜
visual acuity?
colours or not and what pigment?
found where?
sensitive or no?
retinal convergence?

Answer 2

good VA
yes iodopsin - blue green red
concentrated in fovea
not sensitive
no convergence

Question 3

rod cells🌑
visual acuity?
colours or not and what pigment?
found where?
sensitive or no?
retinal convergence?

Answer 3

good VA
black and white - rhodopsin
periphery of retina
yes sensitive
yes retinal convergence - causes summation

Question 4

what’s does retinal convergence mean?🌙

Answer 4

can detect small quantities of light- all stimuli add together to generate an action potential (summation)

Question 5

sum up the steps to increase heart rate when blood pressure to high🎀

Answer 5

pressure receptors transmit nervous impulses to medulla that inc heart rate. impulses travel via parasympathetic NS to SAN which decreases heart rate

Question 6

what’s the resting membrane potential of an axon?
what is the threshold for an AP?
🍸🐉🐆💍

Answer 6

-70mV
-40mV