What does the bicep flex at the elbow?: Forearm What fluid is serving as a shock absorber for central nervous system?: Cerebrospinal fluid The heart is located in which cavity?: Pericardial Mitochondria, lysosomes, ribosomes are examples of?: Organelles What regulates light entering the pupil?: Iris What layer of the skin contains spiny-shaped cells?: Stratum Spinosum Which direction do abductor muscles move an extremity?: Away What is the spinal cord a continuation of?: Medulla oblongata What system brings oxygen to and eliminates carbon dioxide from blood?: Respiratory ‘ Transcription occurs in which organelle?: Nucleus By late 70’s, what percent of muscle mass has disappeared?: 50% Eccrine glands are the most common type of what?: Sweat gland What is an individual bundle of muscle cells called?: Fascicle Which division of the autonomic nervous system prepares the body from stress?: Sympathetic Stomach and bladder are in which cavity?: Abdominopelvic Smallest living units of biological organization?: Cells Has a cuticle, cortex, and medulla?: Hair What is the oily substance excreted onto the skin?: Sebum What kind of muscles are found inside the digestive tract, blood vessels, and uterus?: Smooth First contraction in labor is an example of what process?: Positive feedback Which type of muscle is found only in the heart?: Cardiac Chondrocytes are found in what cavities?: Lacunae Neurotransmitter at the neuromuscular junction?: Acetylcholine What is the stratum germinativum?: Regenerative layer of the skin Lactic acid builds up in muscles when this molecule is converted in the absence of oxygen?: Pyruvic acid Which part of the autonomic nervous system operates under non stressful conditions?: Parasympathetic What converts food into simpler substances for absorption?: Digestive system What restores resting membrane potential?: Repolarization Brain is located in which cavity?: Cranial The loss of what makes the elderly more sensitive to the cold?: Circulation Phosphocreatine provides cells with what energy producing molecules?: ATP Brain decreases in size and mass due to loss of what?: Neurons How many nuclei does heart muscle contain?: Uninucleated Which glands are ductless and secrete hormones?: Endocrine Process correcting change to bring body back to normal?: Negative feedback
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