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
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
