My cat killed a bird with a blue tag on its leg saying something like TE and some numbers like 25 and 39. What does the tag mean and did my cat kill a bird which had a owner?

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Which of these parts of the membrane large moecules pass through it ?