Phys: Calcium, Contraction, And AP Flashcards
1
Q
ECF Ca2+ alters cell excitability (AP) by changing…
A
The threshold of Na voltage gates
2
Q
Muscles that don’t need ECF Ca2+
A
-skeletal muscle
-no effect on strength of contraction
3
Q
Hypercalcemia increases the threshold which makes:
A
-gates harder to open
-less excitable
4
Q
Hypocalcemia decreases the threshold which makes:
A
-gates easier to open
-more excitable
5
Q
Muscles that need ECF Ca2+
A
-cardiac and smooth muscle
-hypercalcemia, stronger
-hypocalcemia, weaker
