BIO 141 Lab 3: Muscle, Nervous Tissue, and Integumentary System

Vocabulary practice flashcards covering muscle tissues, nervous tissue structures, and integumentary system layers and receptors from BIO 141 Lab 3.

Skeletal muscle tissue

Striated muscle tissue under voluntary (conscious) control, composed of straight cylindrical cells where each cell is multinucleated.

Cardiac muscle tissue

Striated muscle tissue under involuntary (unconscious) control, composed of short branched cells with large single nuclei and intercalated discs.

Smooth muscle tissue

Non-striated muscle tissue under involuntary (unconscious) control, composed of short slender cells with a central nucleus.

Neurons

Nervous tissue cells characterized by a large darkly stained nucleus, surrounded by lightly stained cytoplasm, appearing to have branching extensions ("arms").

Neuroglia

Supportive cells in nervous tissue whose nuclei appear as small darkly stained "dots" under a microscope.

Epidermis

The superficial layer of the skin.

Dermis

The deep layer of the skin located directly beneath the epidermis.

Hypodermis

A subcutaneous tissue layer that anchors the skin to underlying tissues, though it is not part of the skin itself.

Intercalated disc

A specialized microscopic boundary structure located between short branched cells in cardiac muscle tissue.

Meissner's corpuscle

A cutaneous tactile receptor in the skin that functions as a light touch receptor.

Pacinian corpuscle

A cutaneous receptor located in the skin that functions as a pressure receptor.

Free nerve ending

A cutaneous sensory receptor in the skin that functions as a temperature and pain receptor.

Melanocytes

Pigment-producing cells located in the deep region of the epidermis that generate melanin.

Arrector pili muscle

A band of smooth muscle attached to a hair follicle in the skin.

Stratum basale

The deepest layer of the epidermis, adjacent to the dermal papillae of the dermis.

Stratum corneum

The most superficial layer of the epidermis, consisting of flattened cornified cells.

Neuron model

An anatomical model depicting a neuron cell body with a central nucleus, branching dendrites, and an elongated axon.

Skin model

An anatomical model demonstrating the layers of the skin (epidermis, dermis), hypodermis, hair follicles, glands, blood vessels, and nervous receptors.