Anatomy: Skin, Bone, and Muscle Tissues Vocabulary

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Questions and Answers

What is the epidermis?

Outer layer of skin, provides protection.

What are keratinocytes?

Cells producing keratin, waterproofs skin.

What is a Pacinian corpuscle?

Pressure receptor in dermis layer.

What are sweat glands?

<p>Produce sweat for thermoregulation and excretion.</p> Signup and view all the answers

What are friction ridges?

<p>Unique patterns on fingertips for grip.</p> Signup and view all the answers

What are cleavage lines?

<p>Lines indicating skin tension and orientation.</p> Signup and view all the answers

What are the functions of bone?

<p>Support, movement, protection, mineral storage.</p> Signup and view all the answers

What are osteoblasts?

<p>Bone cells responsible for bone formation.</p> Signup and view all the answers

What is intramembranous ossification?

<p>Bone development from fibrous membranes.</p> Signup and view all the answers

What is endochondral ossification?

<p>Bone development from cartilage models.</p> Signup and view all the answers

What is the diaphysis?

<p>Long shaft of a long bone.</p> Signup and view all the answers

What is the periosteum?

<p>Outer connective tissue covering bones.</p> Signup and view all the answers

What is an osteon?

<p>Structural unit of compact bone.</p> Signup and view all the answers

What is a sarcomere?

<p>Basic contractile unit of muscle tissue.</p> Signup and view all the answers

What is the neuromuscular junction?

<p>Connection between nerve and muscle fiber.</p> Signup and view all the answers

What is a motor unit?

<p>A motor neuron and its muscle fibers.</p> Signup and view all the answers

What is isotonic contraction?

<p>Muscle changes length during contraction.</p> Signup and view all the answers

What is treppe?

<p>Increased contraction strength with repeated stimulation.</p> Signup and view all the answers

What is resting membrane potential?

<p>Standard voltage across neuron membrane at rest.</p> Signup and view all the answers

What is depolarization?

<p>Reduction in membrane potential, neuron activation.</p> Signup and view all the answers

What are bone functions?

<p>Support, movement, protection, mineral storage.</p> Signup and view all the answers

Flashcards

Epidermis

Outer protective layer of the skin.

Dermis

Inner layer of skin containing blood vessels, hair follicles, and nerve endings.

Keratinocytes

Dominant cells in the epidermis that produce keratin for waterproofing.

Pacinian corpuscle

Sensory receptor in the dermis that responds to deep pressure and vibrations.

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Sweat glands

Glands in the skin that produce sweat to regulate body temperature and excrete waste.

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Friction ridges

Unique patterns on fingertips that enhance grip and provide individual identification.

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Cleavage lines

Patterns in the skin indicating the orientation of collagen fibers and skin tension.

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Flexure lines

Folds in the skin near joints that allow for flexibility and movement.

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Bone functions

Provide support, movement, protection, mineral storage, and blood cell formation.

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Osteoblasts

Cells responsible for synthesizing new bone matrix during bone formation and remodeling.

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Intramembranous ossification

Bone development directly from fibrous membranes, forming flat bones like the skull.

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Endochondral ossification

Bone formation from hyaline cartilage models, forming most bones in the body.

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Diaphysis

The long, cylindrical shaft of a long bone, composed mainly of compact bone.

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Periosteum

Outer connective tissue layer covering bones, providing attachment for muscles and tendons.

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Osteon

Basic structural unit of compact bone, consisting of concentric layers of bone matrix.

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Sarcomere

The functional unit of muscle, responsible for muscle contraction.

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Neuromuscular junction

The site where a motor neuron communicates with a muscle fiber to initiate muscle contraction.

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Motor unit

A motor neuron and all the muscle fibers it innervates, working together to produce movement.

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Isotonic contraction

Muscle contraction that involves a change in muscle length while tension remains constant.

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Isometric contraction

Muscle contraction in which the muscle length remains unchanged while tension increases.

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Treppe

The progressive increase in muscle contraction strength with repeated stimulation.

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Resting membrane potential

The electrical potential across the plasma membrane of a neuron when it is at rest.

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Depolarization

A decrease in membrane potential, making the inside of the neuron less negative and more likely to fire an action potential.

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Hyperpolarization

An increase in membrane potential, making the inside of the neuron more negative and less likely to fire an action potential.

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Study Notes

  • Vocabulary related to anatomy, focusing on skin, bone, and muscle tissues

Skin Terminology

  • Epidermis: The outermost layer of the skin that provides a protective barrier.
  • Dermis: The inner layer of the skin containing blood vessels.
  • Keratinocytes: Specialized cells that produce keratin to waterproof the skin.
  • Pacinian corpuscle: A receptor located in the dermis, sensitive to pressure.
  • Sweat glands: Responsible for producing sweat, which aids in thermoregulation and excretion.
  • Friction ridges: Unique patterns found on fingertips that enhance grip.
  • Cleavage lines: Indicate the direction of skin tension and orientation.
  • Flexure lines: Skin folds that occur at joints, allowing for flexibility.

Bone Terminology

  • Bone functions include support, movement, protection, and mineral storage.
  • Osteoblasts: Bone cells involved in the process of bone formation.
  • Intramembranous ossification: Bone development originating from fibrous membranes.
  • Endochondral ossification: Bone development that uses cartilage models.
  • Diaphysis: The long, central shaft of a long bone.
  • Periosteum: The outer connective tissue layer that covers bones.
  • Osteon: The basic structural unit of compact bone.

Muscle Terminology

  • Sarcomere: The fundamental contractile unit found in muscle tissue.
  • Neuromuscular junction: The site where a nerve connects to a muscle fiber.
  • Motor unit: Composed of a motor neuron and the muscle fibers it controls.
  • Isotonic contraction: Muscle contraction during which the muscle changes length.
  • Isometric contraction: Muscle contraction where the muscle length remains constant.
  • Treppe: The phenomenon where repeated stimulation leads to increased muscle contraction strength.

Neuron Terminology

  • Resting membrane potential: The baseline voltage maintained across a neuron's membrane when at rest.
  • Depolarization: A reduction in membrane potential that leads to neuron activation.
  • Hyperpolarization: An increase in membrane potential that results in neuron inhibition.

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