What structure within a skeletal muscle cell extends from Z line to Z line?

Some odors cause visceral reactions, such as a gagging response to the smell of rotten food. Such responses are a result of olfactory pathways through the

Feelings of thirstiness are brought on by

What two bones, one on the left and one on the right, fuse to form the sagittal suture?

  In this illustration of the inner ear, what structure does the number 1 indicate?

Generally, negatively charged plasma proteins are

Mechanoreceptors and chemoreceptors are found in the

When norepinephrine is released from postganglionic neurons, its targets are

The ANS uses pathways that include two-neuron chains to innervate its effector organs.

Which sympathetic pathway is responsible for activating the esophagus, heart, lungs, and thoracic blood vessels?