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?

A neuron can send a weak action potential if the stimulus isn’t very strong.

An individual muscle cell is often referred to as a:

Muscles are attached to bones by:

A dark brown pigment produced by some cells of the epidermis:

This chemical can be used as a quick source of ATP by combining with ADP:

The epidermis is what type of epithelial tissue?

Check the box next to the “Lone Pine Fault” folder and double click to fly there. Zoom in a bit to better see the fault scarp where the placemarks are. The scarp is slightly darker gray than its surroundings. The red line illustrates the base of the scarp. Based on the locations of the “Hanging wall” and “Footwall” placemarks, what type of fault is this?

Check the “Yucatan, Mexico” folder and double click to fly there. Inspect the area highlighted in the “Yucatan, Gulf of Mexico” Image overlay. As well as the “Drill Core M0077A” placemark (click its name to view two images representing important finds within the core at ~65 Mya). Which of the following statements is NOT supported by the data at this location: