In the skeletal system, these structures are responsible for connecting bones. A.ligaments and tendonsB. cartilage and calciumC. tendons and musclesD. bones and ligaments

Ligaments and Tendons

Explanation:

Ligament - A small band of dense, white, fibrous elastic tissue. Ligaments connect the ends of bones together in order to form a joint.

Tendon - A tough, flexible band of fibrous connective tissue that connects muscles to bones.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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the wires in the toaster turning red and the toast crisping and turning brown