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Final Exam- BIO 251 |120 Questions and Answers

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Final Exam- BIO 251 |120 Questions and Answers tissues in the body are classified into which of the following four types? Correct Answernervous, muscle, epithelial, and connective

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  • September 10, 2024
  • 22
  • 2024/2025
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Final Exam- BIO 251 |120 Questions and Answers
tissues in the body are classified into which of the following four types? Correct Answer-

nervous, muscle, epithelial, and connective




which of the following accurately represents the order of complexity for the body, from least

to most complex? Correct Answer-cells, tissues, organs and organ systems




which of the following compartments contain most of the water found in the human body?

Correct Answer-intracellular fluid




referring to a membrane as "selectively permeable" describes its ability to... Correct

Answer-allow the movement of certain molecules across the membrane but restrict the

movement of other molecules




which of the following statements about homeostasis is false? Correct Answer-the primary

mechanism to maintain homeostasis is positive feedback




the body fluid compartment with a high potassium concentration is... Correct Answer-

intracellular fluid

, Final Exam- BIO 251 |120 Questions and Answers
extracellular fluid is composed of... Correct Answer-both the interstitial fluid and plasma




direct communication between cells in contact with one another is accomplished through...

Correct Answer-gap junctions




which type of chemical messenger is released into the bloodstream by an endocrine gland

where it can affect target cells throughout the body? Correct Answer-hormone




in most homeostasis mechanisms, a (blank) detects a change in a regulated variable and

sends that information to an (blank) which relays signals to an (blank) usually a muscle or a

gland Correct Answer-sensor; integrating center; effector




ion channels are examples of what type of membrane protein? Correct Answer-

transmembrane protein




which of the following is not a type of integral membrane protein? Correct Answer-an

intracellular receptor for a messenger

, Final Exam- BIO 251 |120 Questions and Answers
when molecules are passively transported across a membrane, the direction of their

movement is dictated by the molecule's tendency to move... Correct Answer-from higher

concentration to lower concentration




based solely upon its negative electrical charge, the inside of a typical cell will tend to attract

extracellular (blank) to move inward Correct Answer-cations




transporting a substance against its concentration gradient requires... Correct Answer-a

transporter that uses metabolic energy




most cells have a resting membrane potential of... Correct Answer--70 mV




what type of ion channels in the membranes of all cells allows ions to constantly move across

the membrane at rest and thereby contribute to the resting membrane potential? Correct

Answer-leak channels




which of the following best describes the electrochemical forces acting on sodium and

potassium ions across the cell membrane? Correct Answer-the force on sodium ions is to

move into the cell, and the force on potassium ions is to move out of the cell

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