TEAS 6 Science (A+ Graded)

Muscles involved in inhalation and do they expand or contract? correct answers Intercostals and diaphragm contract Part of brain that monitors CO2 to regulate breathing correct answers Medulla oblongata Two main functions of nucleolus correct answers Protein synthesis, synthesis and storage of RNA Function of ribosomes correct answers Synthesize proteins from RNA Golgi complex function correct answers Synthesizes materials such as proteins that are transported out of the cell Endoplasmic reticulum correct answers transport system of cell Mitochondria functions correct answers Production of cell energy; cell signaling; cellular differentiation; cell cycle and growth regulation Events of prophase correct answers chromatin thickens into chromosomes; nuclear membrane begins to disintegrate; pairs of centrioles move to opp sides of cell and spindle fibers form; mitotic spindle starts to move chromosomes around Connective tissue correct answers bone, cartilage, tendons, ligaments, fat, blood, lymph Hyperventilation does what to pH? correct answers Increases blood pH during acidosis; slowing breathing during alkalosis will decrease pH How much blood in adult human? correct answers 5 L/quarts Composition of blood correct answers ... Cardiac cycle correct answers First diastole: blood flows from sup and inf vena cavae to right atrium through open AV/tricuspid valve. SA node of right atrium contracts to fill R ventricle w blood. Impulse transmitted through AV node, R ventricle contracts and initiates first systole. Tricuspid valve closes, pulmonary semilunar opens. Blood pumped from pulmonary arteries to lungs. Blood from lungs fills L atrium during second diastole. SA node triggers mitral valve to open, blood fills left ventricle. During second systole, mitral valve closes and L ventricle contracts, blood pumped from aorta to rest of body. Lymph vascular system functions correct answers Return of excess fluid to blood; return of proteins from capillaries; transport of fats from digestive tract; disposal of debris and cellular waste Thymus functions correct answers Thymosin promotes Tcell formation, T cells mature here