Questions

Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.

In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.

The striations are a result of the A bands of sarcomeres appearing as relatively wide, dark stripes under the microscope, which alternate with narrower, lighter colored stripes formed by the I bands. 

The striations of skeletal muscle are created by the organization of actin and myosin filaments resulting in the banding pattern of myofibrils.

A group that explores a new land is called expedition.