Sphincter, or dilator, muscles are special circular muscles that open and close to control the passage of substances.​

_____ is a seizure disorder of the brain charaterized by a recurring and excessive discharge from neurons​

​Which muscle group is responsible for moving the shoulder and upper arm?

The peripheral nervous system includes all the nerves that connect the brain and spinal cord with sensory receptors, muscles, and glands.​

Some molecules such as water can cross the membrane easily, while other larger substances cannot easily cross the cell membrane. This is because the cell membrane is:

The masseter and temporalis muscles are representative of the muscles of ____________________.​

Secretory proteins are.

Muscles are responsible for producing most of our body heat.​

An infectious disease characterized by continuous spasms of the vouluntary muscles. ​

The diencephalon contains the thalamus and the hypothalamus.​