hUMAN AND ANATOMY

Front

What part of the spinal cord contains cell bodies that regulate cardiac muscle, smooth muscle, and glands?

Back

The portion labeled 'F' in the diagram.

Front

Which type of channels allows more potassium to diffuse down their concentration gradient compared to sodium?

Back

The channels labeled 'A' in the diagram.

Front

What is a node of Ranvier?

Back

A gap in the myelin sheath of a nerve fiber, labeled 'B' in the diagram.

Front

Which nerve innervates muscles that extend the toes and, if damaged, results in foot drop?

Back

The nerve labeled 'F' in the diagram.

Front

Which structure contains centers that control heart rate and blood pressure?

Back

The structure labeled 'D' in the diagram.

Tags

NGSS.HS-LS1-3

Front

What is the function of the autonomic nervous system?

Back

It regulates involuntary bodily functions, including heart rate and digestion.

Tags

NGSS.HS-LS1-3

Front

Define myelin sheath.

Back

A fatty layer that insulates nerve fibers and increases the speed of electrical impulses.

Front

What is the role of potassium ions in nerve transmission?

Back

Potassium ions help to repolarize the neuron after an action potential.

Front

What is the significance of the spinal cord in the human body?

Back

It serves as the main pathway for information connecting the brain and peripheral nervous system.

Front

What are the two main divisions of the nervous system?

Back

The central nervous system (CNS) and the peripheral nervous system (PNS).