Frog Dissection and Nerve Function

The video tutorial demonstrates the dissection of a frog to expose and stimulate the sciatic nerve. It begins with preparing the frog and making an incision to remove the skin. The thigh muscles are cut to reveal the sciatic nerve, which is then freed from surrounding tissue. The nerve and muscle are moistened with Ringer's solution. Finally, the muscle is fixed at the knee, and electrical stimulation is applied to observe changes in the calf muscle.

What is the first step in preparing the frog for dissection?

• Placing the frog on the dissection board

• Stimulating the nerve with electricity

• Cutting the thigh muscles

• Applying Ringer's solution

Which tool is used to cut open the skin of the frog?

• Forceps

• Scissors

• Scalpel

• Seeker

What is the purpose of using a seeker during the dissection?

• To cut the skin

• To pin the muscles

• To free the nerve from surrounding tissue

• To apply electrical stimulation

Why is Ringer's solution applied to the nerve and muscle?

• To moisten and maintain tissue viability

• To stabilize the muscle

• To stimulate the nerve

• To dry the tissue

What is observed when 10 volts are applied to the nerve?

• The skin changes color

• The thigh muscle relaxes

• The calf muscle contracts

• The nerve becomes visible