A rapidly dividing tissue is exposed to radiation that damages DNA. Which tissue is most likely to show early functional impairment?

A negative feedback loop requires that the response increases the original deviation from the set point.

An MRI slice is taken that divides the body into anterior and posterior portions. Which plane produces this view?

In anatomical position, the thumbs point medially toward the body’s midline.

Oxidative phosphorylation depends on a proton gradient across a membrane. In eukaryotes, this gradient is established across which structure?

A cell uses ATP to power a transport process. Which feature of ATP best explains why it can transfer energy to cellular work?

A nurse infuses a solution that is isotonic with plasma. Which outcome is most consistent for most body cells exposed to this solution?

A sagittal plane divides the body into anterior and posterior portions.

A macrophage surrounds and internalizes an intact bacterium. Which process best describes this uptake?

Facilitated diffusion moves solutes down their gradient and requires ATP hydrolysis.