Bio 253 exam Study guides, Class notes & Summaries

Functions of blood - Transport it substances Regulation of temperature Gas exchange Regulate ph and other hormones Protects blood loss through clotting Blood components - 45% formed elements 55% plasma erythrocytes, leukocytes, platelets, plasma What do erythrocytes (RBC) do - Hemoglobin (protein) binds to RBC and carries O2 Leukocytes (wbc) function - Whole cells that protect against infection and foreign invaders. Platelets (thrombocytes) function - Clotting and coagulation Plasma ...

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What does a central nervous system consists of - Brain and spinal cord What is the function of the CNS - Integrated control center What does a pns consist of - Cranial and spinal nerves What is the function of the pns - Communication lines between CNS and the rest of the body What sends impulses to The pns - Sensory division (afferent) What sends impulses from CNS to effector (muscles or glands) - ...efferent Autonomic nervous system - Involuntary (viseral motor) Conducts impulses from C...

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Organism Hierarchy - Answer- Atom, molecules (macromolecules), cells, tissues, organs, organ systems, organism 11 Major Human Body Systems - Answer- Muscular Endocrine Nervous Cardiovascular Lymphatic Integumentary Skeletal Digestive Urinary Reproductive Respiratory Integumentary System - Answer- Skin, Hair, and Nails Protects deeper tissue from injury and dehydration Allows for feeling of heat and pressure Skin forms Vitamin D Skeletal System - Answer- Bones, Joints, and t...