Anatomy

Sarcomere

The structural unit of a muscle, composed of actin and myosin filaments that interact during contraction.

Muscle Contraction

The process by which muscle fibers generate force and shorten, typically classified into different types such as isotonic and isometric.

ATP Generation in Muscle Cells

Muscle cells generate ATP through processes like aerobic respiration, anaerobic glycolysis, and creatine phosphate breakdown, each having different implications for performance and endurance.

Muscular System

The organ system that allows movement of the body, comprised of all muscle types and their connection to the skeleton.

Function of Muscles

Muscles facilitate movement, maintain posture, and produce heat as a byproduct of metabolism.

Components of Nervous Tissue

Nervous tissue consists of neurons and glial cells, with neurons responsible for transmitting signals and glial cells supporting and protecting neurons.

Neuron Structure

The basic structure of a neuron includes the cell body, dendrites, and axon, which together facilitate the transmission of electrical signals.

Action Potential Generation

The process involving depolarization and repolarization of a neuron's membrane leading to a rapid change in membrane potential that constitutes an action potential.

Neurotransmitters

Chemical messengers that transmit signals across a synapse from one neuron to another, with their action being initiated by release and terminated by reuptake or degradation.

Central Nervous System (CNS)

The part of the nervous system that includes the brain and spinal cord, responsible for processing and integrating sensory information and coordinating responses.

Grey Matter

Areas of the central nervous system rich in neuronal cell bodies, involved in processing and integrating information.

White Matter

Composed primarily of myelinated axons, white matter is responsible for the transmission of signals between different areas of the central nervous system.

Regions of the Brain

Different parts of the brain include the cerebrum, cerebellum, and brainstem, each serving distinct functions such as coordination, higher-order processing, and vital functions.

Cerebral Cortex Diffuse Systems

Complex networks within the cerebral cortex that play roles in attention, mood regulation, and arousal.

Spinal Cord Organization

The spinal cord is organized into segments, each corresponding to specific body regions, facilitating reflex actions and communication between the brain and body.