Bio 251 Final Exam with well researched
questions and detailed answers
tissues in the body are classified into which of the following four types? - CORRECT ANSWERS-
nervous, muscle, epithelial, and connective
which of the following accurately represents the order of complexity for the body, from least to most
complex? - CORRECT ANSWERS-cells, tissues, organs and organ systems
which of the following compartments contain most of the water found in the human body? - CORRECT
ANSWERS-intracellular fluid
referring to a membrane as "selectively permeable" describes its ability to... - CORRECT ANSWERS-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 ANSWERS-the primary
mechanism to maintain homeostasis is positive feedback
the body fluid compartment with a high potassium concentration is... - CORRECT ANSWERS-intracellular
fluid
extracellular fluid is composed of... - CORRECT ANSWERS-both the interstitial fluid and plasma
direct communication between cells in contact with one another is accomplished through... - CORRECT
ANSWERS-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 ANSWERS-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
ANSWERS-sensor; integrating center; effector
ion channels are examples of what type of membrane protein? - CORRECT ANSWERS-transmembrane
protein
which of the following is not a type of integral membrane protein? - CORRECT ANSWERS-an intracellular
receptor for a messenger
when molecules are passively transported across a membrane, the direction of their movement is
dictated by the molecule's tendency to move... - CORRECT ANSWERS-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 ANSWERS-cations
transporting a substance against its concentration gradient requires... - CORRECT ANSWERS-a
transporter that uses metabolic energy
most cells have a resting membrane potential of... - CORRECT ANSWERS--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 ANSWERS-leak
channels
which of the following best describes the electrochemical forces acting on sodium and potassium ions
across the cell membrane? - CORRECT ANSWERS-the force on sodium ions is to move into the cell, and
the force on potassium ions is to move out of the cell
questions and detailed answers
tissues in the body are classified into which of the following four types? - CORRECT ANSWERS-
nervous, muscle, epithelial, and connective
which of the following accurately represents the order of complexity for the body, from least to most
complex? - CORRECT ANSWERS-cells, tissues, organs and organ systems
which of the following compartments contain most of the water found in the human body? - CORRECT
ANSWERS-intracellular fluid
referring to a membrane as "selectively permeable" describes its ability to... - CORRECT ANSWERS-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 ANSWERS-the primary
mechanism to maintain homeostasis is positive feedback
the body fluid compartment with a high potassium concentration is... - CORRECT ANSWERS-intracellular
fluid
extracellular fluid is composed of... - CORRECT ANSWERS-both the interstitial fluid and plasma
direct communication between cells in contact with one another is accomplished through... - CORRECT
ANSWERS-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 ANSWERS-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
ANSWERS-sensor; integrating center; effector
ion channels are examples of what type of membrane protein? - CORRECT ANSWERS-transmembrane
protein
which of the following is not a type of integral membrane protein? - CORRECT ANSWERS-an intracellular
receptor for a messenger
when molecules are passively transported across a membrane, the direction of their movement is
dictated by the molecule's tendency to move... - CORRECT ANSWERS-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 ANSWERS-cations
transporting a substance against its concentration gradient requires... - CORRECT ANSWERS-a
transporter that uses metabolic energy
most cells have a resting membrane potential of... - CORRECT ANSWERS--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 ANSWERS-leak
channels
which of the following best describes the electrochemical forces acting on sodium and potassium ions
across the cell membrane? - CORRECT ANSWERS-the force on sodium ions is to move into the cell, and
the force on potassium ions is to move out of the cell
