Which property of muscle tissue gives it the ability to contract and relax?
a. presence of neurons
b. presence of actin and myosin
c. presence of the extracellular matrix
d. presence of secretory structures

The correct answer is B.

Muscle contraction is the physiological process in which muscles develop tension due to an extension stimulus.

The contractions are controlled by the central nervous system. While the brain controls voluntary contractions, the spinal cord controls involuntary reflexes. The Actin and myosin make up 90% of muscle proteins, intervening in muscle contraction and relaxation.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

john f. kennedy purpose was to make his argument a strong appeal to emotion in order to make an impact and connection to american citizens. he want to achieve peace by telling the citizens they shouldn't be afraid of other nations.

explanation: