Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.)
-contraction triggered as Ca²⁺ physically pulls troponin and tropomyosin from its blocking position over actin's binding sites for the cross bridges
A)skeletal muscle only
B)single-unit smooth muscle only
C)cardiac muscle only
D)skeletal muscle and cardiac muscle
E)skeletal muscle and single-unit smooth muscle
F)single-unit smooth muscle and cardiac muscle
G)skeletal, single-unit smooth, and cardiac muscles

Question

Quizplus · Accepted Answer

Contraction triggered as Ca²⁺ physically pulls troponin and tropomyosin from its blocking position over actin's binding sites for the cross bridges is a property of both skeletal muscle and cardiac muscle. Single-unit smooth muscle does not have troponin and tropomyosin as part of its contractile mechanism.

Match the Types of Muscles, Labelled A