Calcium Ions Flashcards
Ca2+ is essential in the movement of organisms:
In synapses, calcium ions …
regulate the transmission of impulses from neurone to neurone
Ca2+ also stimulates muscle contraction
When an impulse reaches a muscle fibre, Ca2+ is released from the …………….
This Ca2+ binds to troponin C, removing the………………… from myosin-binding sites on actin
This allows ………………….to form when the…………………………
sarcoplasmic reticulum
tropomyosin
actin-myosin cross-bridges
muscle fibre contracts
Ca2+ can also help to regulate protein channels, which affects the
permeability of cell membranes
Many enzymes are activated by Ca2+, making these ions key………………… in many biological reactions
Regulators
The presence of Ca2+ is also necessary for the formation of blood ………………………….
clots (it is known as a clotting factor)
what is calcium ions used in
formation of blood clots
regulators in many biological reactions
regulate protein channels
stimulates muscle contraction
the movement of organisms:
