The body's ability to maintain a stable internal environment despite external changes.

A rapid electrical signal that travels along the membrane of a nerve or muscle cell.

The junction between two neurons where neurotransmitters transmit signals.

A chemical messenger secreted by glands that regulates physiology and behavior.

The passive movement of molecules from an area of high concentration to low concentration.

The diffusion of water across a selectively permeable membrane.

Tiny air sacs in the lungs where gas exchange occurs.

The basic contractile unit of muscle fiber, composed of actin and myosin filaments.

The main energy currency of the cell, used for most cellular processes.

A chemical that transmits signals across a synapse from one neuron to another.

A control mechanism where a change in a system causes a response that returns the system to its original state.

A mature bone cell responsible for maintaining bone tissue.

A strong, fibrous connective tissue that connects muscle to bone.

A tough band of connective tissue that connects bone to bone and stabilizes joints.

Sliding Filament Theory

A model explaining muscle contraction where actin and myosin filaments slide past each other to shorten the sarcomere.

A thick protein filament in muscle fibers that uses energy (ATP) to pull on actin and cause muscle contraction.

A thin protein filament that interacts with myosin; it provides the track along which myosin pulls to shorten the muscle.

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Physiology

Question	Answer
Homeostasis	The body's ability to maintain a stable internal environment despite external changes.
Action Potential	A rapid electrical signal that travels along the membrane of a nerve or muscle cell.
Synapse	The junction between two neurons where neurotransmitters transmit signals.
Hormone	A chemical messenger secreted by glands that regulates physiology and behavior.
Diffusion	The passive movement of molecules from an area of high concentration to low concentration.
Osmosis	The diffusion of water across a selectively permeable membrane.
Alveoli	Tiny air sacs in the lungs where gas exchange occurs.
Sarcomere	The basic contractile unit of muscle fiber, composed of actin and myosin filaments.
ATP	The main energy currency of the cell, used for most cellular processes.
Neurotransmitter	A chemical that transmits signals across a synapse from one neuron to another.
Negative Feedback	A control mechanism where a change in a system causes a response that returns the system to its original state.
Osteocyte	A mature bone cell responsible for maintaining bone tissue.
Tendon	A strong, fibrous connective tissue that connects muscle to bone.
Ligament	A tough band of connective tissue that connects bone to bone and stabilizes joints.
Sliding Filament Theory	A model explaining muscle contraction where actin and myosin filaments slide past each other to shorten the sarcomere.
Myosin	A thick protein filament in muscle fibers that uses energy (ATP) to pull on actin and cause muscle contraction.
Actin	A thin protein filament that interacts with myosin; it provides the track along which myosin pulls to shorten the muscle.

Created by: user-1989142

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