Cardiac muscle cells generating electrical impulses without nervous system input.

automaticity

The renal tubule (PCT, loop of Henle, DCT, and collecting duct pathway) carries filtrate away from the glomerulus and performs reabsorption and secretion to adjust the filtrate into urine

renal tubule

DNA wrapped around proteins (histones) and appears as thin, threadlike material when the cell is not dividing. During cell division, chromatin condenses to form chromosomes

chromatin

How a cell moves substances from low concentration to high concentration (against the concentration gradient), which requires energy (ATP). It uses transport proteins (pumps) in the cell membrane. Classic example: the sodium-potassium pump, which moves Nat out of the cell and K* in of the cell using ATP

active transport

A column of erectile tissue in the penis that surrounds the urethra and runs along the underside of the penis. Keeps the urethra open during erection so semen (and urine) can pass through; Forms the glans penis (the enlarged tip) at the distal end

corpus spongiosum

A special type of cell division that makes sex cells (gametes) sperm and eggs. The parent cell splits its supply of 46 chromosomes between two daughter cells, resulting in two cells with 23 chromosomes each. Because homologous chromosomes in the parent cell exchange genetic information before separating, the daughter cells are genetically unique.

meiosis

the plane that divides the body into left an right portions

sagittal

the kidney lies against the

posterior

the heart is located in the

thoracic

the slit where structures enter and leave the kidney is called

hilum

the dorsal body cavity contains the what cavities

cranial and spinal

cells powerhouse

mitochondria

outter layer of skin that receives nutrients by diffusion

epidermis

forms the bulk of the plasma membrane

phospholipids

tissue type defined by an extracellular matrix

connective tissue

skin layer containing blood vessels

dermis

red bone marrow is in what

children

yellow bone marrow is in what

adults