When a neuron is depolarized to its threshold level:

The name given to the dual-layered connective tissue membrane around a bone:

Contains the cell bodies of sensory neurons that are about to enter the spinal cord:

Connective tissue that surrounds fascicles within a skeletal muscle:

In what environment does this rock type typically form?

The division of the ventral body cavity above the diaphragm is:

Tissue within the CNS that consists of association neurons and unmyelinated axons:

The part of the ear responsible for hearing:

Acetylcholine will be received by a skeletal muscle cell at the:

The rock identified above is 4.03 Ga. This is the oldest yet dated rock in Earth’s history. Which part of Earth’s biography does this characterize?