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Exam (elaborations)

JMU BIO 270 Exam 1 Questions and Answers

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  • Bio 270
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  • Bio 270

JMU BIO 270 Exam 1 Questions and Answers define homeostasis - ANSWER-the maintenance of a relatively stable environment function depends on - ANSWER-structure extracellular fluid - ANSWER-fluid environment in which cells live What are the two types of extracellular fluid? - ANSWER-plasma and i...

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  • October 30, 2024
  • 45
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Bio 270
  • Bio 270
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JMU BIO 270 Exam 1 Questions and

Answers


define homeostasis - ANSWER✔✔-the maintenance of a relatively stable environment


function depends on - ANSWER✔✔-structure


extracellular fluid - ANSWER✔✔-fluid environment in which cells live


What are the two types of extracellular fluid? - ANSWER✔✔-plasma and interstitial fluid


define intracellular fluid - ANSWER✔✔-fluid within the cell


What are the main functions of the cell? - ANSWER✔✔--obtain oxygen and nutrients from environment


-perform energy-generating chemical reactions


-eliminate waste


-synthesize proteins


-moving materials through cell


-responding to the environment

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-reproducing


What are the main cell nutrients? - ANSWER✔✔--carbs


-fats


-protein


What are the levels of organization? - ANSWER✔✔-chemical, cellular, tissue, organ, system, body system

level


96-99% of all cells are made of what? - ANSWER✔✔-oxygen, carbon, hydrogen, nitrogen


define cell - ANSWER✔✔-fundamental unit of structure and function


What are the four main types of primary tissue? - ANSWER✔✔--muscle


-nervous


-epithelial


-connective


What is important about muscle tissue? - ANSWER✔✔--specialized for contracting


-generate tension to produce movement




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What are the three types of muscle tissue? - ANSWER✔✔-skeletal, cardiac, smooth


What does skeletal muscle do? - ANSWER✔✔-moves bones


What does cardiac muscle do? - ANSWER✔✔-pumps blood throughout the body


What is unique about smooth muscle? - ANSWER✔✔-in all organs that are hallow


What are unique of nervous tissue? - ANSWER✔✔--initializing and transmitting electrical signals over

long distances


-communication, coordination, and control


Where can nervous tissue be found? - ANSWER✔✔-brain, spinal cord, peripheral nerves, and special

sense


What characterizes epithelial tissue? - ANSWER✔✔-specialized for exchanging material between cells

and environment


What are the two structures of epithelial tissue? - ANSWER✔✔-epithelial sheets and secretory glands


What are the three functions of epithelial tissue? - ANSWER✔✔-protection, absorption, secretion


How does the epithelial tissue protect? - ANSWER✔✔-boundaries from external environment (skin and

body openings)



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Where does the epithelial tissue absorb? - ANSWER✔✔--large intestine


-small intestine


Where does the epithelial tissue secrete? - ANSWER✔✔--exocrine glands


-endocrine glands


What are glands? - ANSWER✔✔-specialized epithelium for secretion


How are glands formed? - ANSWER✔✔-invaginating pockets during embryogenesis


What are the two types of glands? - ANSWER✔✔-exocrine and endocrine


What are examples of exocrine? - ANSWER✔✔-ducts - exit body


What are examples of endocrine? - ANSWER✔✔-no ducts - use blood vessels


What are connective tissue? - ANSWER✔✔-few cells surrounded by abundance of extracellular material


What does connective tissue do? - ANSWER✔✔--connects, supports, and anchors various body parts


-transportation & immunity


-energy and storage




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