Cell Structure and Function
The "control center" of the cell, containing DNA.
What is the nucleus.
This is the only type of connective tissue with a liquid ground substance.
What is blood.
Undifferentiated cells that can be found in the stratum basale of the dermis.
What is stem cells.
The outermost layer of the skin.
What is the epidermis.
This term refers to a structure being closer to the point of attachment to the trunk.
What is proximal.
This network of membranes is involved in protein and lipid synthesis.
What is the endoplasmic reticulum.
These comprise the majority of epidermal cells.
What is keratinocytes.
These are the most common cell in connective tissue; they produce collagen and are essential for development and repair.
What is fibroblasts.
This oily substance is produced by sebaceous glands to lubricate skin and hair.
What is sebum.
These membrane junctions consist of "rivets" that anchor cells together.
What is desmosomes.
This type of endocytosis is sometimes called "cell drinking".
What is pinocytosis.
In this type of tissue, every cell reaches the basement membrane but not all cells reach the free surface.
What is pseudostratified epithelial tissue.
These synthesize the pigment melanin that shields DNA from ultraviolet radiation.
What is melanocytes.
This protein in the epidermis provides strength and waterproofing by forming intermediate filaments.
What is keratin.
These are responsible for fingerprints.
What is dermal papillae.
These are the 3 main types of RNA.
What is rRNA, mRNA, and tRNA.
This type of cartilage is the precursor to bone.
What is hyaline cartilage.
These cells the the body's primary energy reservoirs.
What is adipocytes.
This term describes the process by which the epidermis regenerates approximately every 28 days, shedding old cells from the surface.
What is keratinization or epidermal turnover?
In this layer of the epidermis, Langerhans' cells are most numerous.
What is the stratum spinosum.
This type of cotransport simultaneously transports substances in opposite directions.
What is antiport.
This type of membrane lines closed ventral body cavities.
Cartilage cells in lacunae.
What is chondrocytes.
These cells contract in response to stimulation by sympathetic nervous system to squeeze perspiration up a sweat gland's duct.
Abnormal redness of the skin due to dilated cutaneous blood.
What is erythema.