Tissues and Integumentary System (Packet III)

Comprehensive practice flashcards covering Packet III lecture notes and worksheets on epithelial, connective, muscular, and neural tissues, feedback systems, and the integumentary system.

How many primary tissue categories make up the human body?

Four major categories: epithelial, connective, muscular, and neural tissue.

What overall condition do all body tissues work together to maintain?

Homeostasis.

What general structural role do epithelial cells serve in the body?

They form the inside lining or outside lining of internal or external body surfaces.

What defining feature is shared by all types of connective tissue?

Each cell type is associated with some form of extracellular matrix (ground substance).

What type of matrix is found in adipose and areolar tissues?

A syrupy matrix.

What type of matrix is present in bone and cartilage?

A solid matrix.

What is the liquid matrix of blood called?

Plasma.

What unique functional capability is shared by skeletal, smooth, and cardiac muscle cells?

The ability to contract.

What two cell types make up neural tissue, and what is the primary function of neurons?

Neurons and neuroglia; the primary function of neurons is impulse conduction.

Which specific type of epithelium permits the expansion of the urinary bladder?

Transitional epithelium.

What is the anatomical difference between tendons and ligaments?

Tendons attach muscle to bone, whereas ligaments attach bone to bone.

How do skeletal, smooth, and cardiac muscles differ in their type of contraction control?

Skeletal muscle is voluntary, smooth muscle is involuntary, and cardiac muscle has rhythmic contractions.

What is mesothelium?

A single cell layered tissue that lines the ventral body cavities.

Which epithelial tissue features cells that appear square and resemble little hexagonal boxes?

Cuboidal epithelium.

How are the various types of epithelium classified?

By the shape of cells and the number of cell layers.

Which epithelial tissue type has cells taller and more slender than wide, with nuclei crowded near the basement membrane?

Columnar epithelium.

What type of epithelium lines areas subjected to severe mechanical stress, such as the palm of the hand?

Stratified squamous epithelium.

What are the three types of protein fibers found in connective tissue?

Collagen, elastin, and reticular fibers.

What kind of cells are collected when swabbing the inside lining of the mouth for DNA?

Squamous epithelium (stratified squamous epithelium).

What are cartilage cells also known as?

Chondrocytes.

What specialized cellular structures are present in cardiac muscle cells?

Intercalated discs.

What types of membranes cover the lungs and line the joints, respectively?

Serous membranes cover the lungs, and synovial membranes line the joints.

Under negative feedback principles, when would a hormone that raises blood calcium levels be secreted?

When blood calcium levels decrease.

Blood clotting and childbirth delivery are examples of which feedback mechanism?

Positive feedback system.

What is the largest organ of the human body?

The skin.

What is the primary function of eccrine sweat glands?

They produce a watery substance that evaporates to cool the body (thermoregulation).

What substance do sebaceous glands produce, and what is its purpose?

They produce sebum, an oily substance that lubricates the skin to reduce dryness.

Which cells produce melanin, and what is its role?

Melanocytes produce melanin to protect cell DNA from overexposure to harmful sunlight/UV rays.

From which layer of the epidermis do cells undergo reproduction to replace sloughed skin cells?

The stratum germinativum layer.

What is the correct order of the layers of the skin from most superficial to deepest?

Epidermis, dermis, and subcutaneous layer (hypodermis).

What primary factor determines the color of skin?

The amount of melanin that melanocytes produce.

Where are hair follicles located within the skin?

In the dermis.

What are the arrector pili muscles?

Smooth muscles responsible for pulling hair follicles upright and creating goosebumps.

Which cutaneous gland produces a substance that creates 'natural body odor'?

Apocrine glands.

What are the major physiological functions of the skin?

Protection against trauma and pathogens, body temperature regulation, retarding water loss, sensory reception, and excretion.