bios 252 comprehensive exam Questions with verified
answers
______ cells function as immune/ phagocytic cells within the central nervous
system Ans✓✓✓ microglial
_________ is the summation of postsynaptic potentials in response to stimuli that
occur at different locations in the membrane of a postsynaptic cell at the same
time Ans✓✓✓ spatial summation
_____________ cells are found in the urninary bladder, renal pelvis, and ureters?
Ans✓✓✓ transitional epithelial
a molecule that freely disassociates with water resulting in a low ph solution, best
describes a(n) __________ molecule? Ans✓✓✓ acid
a movement in which you decrease the angle of the joint best describes which
range of motion? Ans✓✓✓ flexion
A muscle that provides the major force for producing a specific movement is
called: Ans✓✓✓ an agonist
An inhibitory neurotransmitter ______ the postsynaptic membrane Ans✓✓✓
hyperpolarizes
During active muscle contraction, the myosin heads will bind to which protein?
Ans✓✓✓ actin
, During inhalation, _____ muscles contract to elevate the ribs. During forces
exhalation _____ muscles contract to depress the ribs Ans✓✓✓ external
intercostals ; internal intercostals
EPSPs (excitatory postsynaptic potentials) occur when Ans✓✓✓ sodium channels
are opened and sodium enters the cell
how many chromosome pairs do the nuclei of human somatic cells contain?
Ans✓✓✓ 23 pairs
In a isometric contraction, the muscle develops tension but does NOT Ans✓✓✓
shorten
In skeletal muscle cells, the transverse tubule is an extension of the Ans✓✓✓
sarcolemma
In the following chemical reaction, which represents products?
AB+CD -----> AD+CB Ans✓✓✓ AD+CB
Most homeostatic mechanisms involve__________, a way of counteracting a
change Ans✓✓✓ negative feedback mechanisms
Put the epidermis in the correct order starting with the deepest layer
a) stratum granulosum
b) stratum corenum
c) statum basale
answers
______ cells function as immune/ phagocytic cells within the central nervous
system Ans✓✓✓ microglial
_________ is the summation of postsynaptic potentials in response to stimuli that
occur at different locations in the membrane of a postsynaptic cell at the same
time Ans✓✓✓ spatial summation
_____________ cells are found in the urninary bladder, renal pelvis, and ureters?
Ans✓✓✓ transitional epithelial
a molecule that freely disassociates with water resulting in a low ph solution, best
describes a(n) __________ molecule? Ans✓✓✓ acid
a movement in which you decrease the angle of the joint best describes which
range of motion? Ans✓✓✓ flexion
A muscle that provides the major force for producing a specific movement is
called: Ans✓✓✓ an agonist
An inhibitory neurotransmitter ______ the postsynaptic membrane Ans✓✓✓
hyperpolarizes
During active muscle contraction, the myosin heads will bind to which protein?
Ans✓✓✓ actin
, During inhalation, _____ muscles contract to elevate the ribs. During forces
exhalation _____ muscles contract to depress the ribs Ans✓✓✓ external
intercostals ; internal intercostals
EPSPs (excitatory postsynaptic potentials) occur when Ans✓✓✓ sodium channels
are opened and sodium enters the cell
how many chromosome pairs do the nuclei of human somatic cells contain?
Ans✓✓✓ 23 pairs
In a isometric contraction, the muscle develops tension but does NOT Ans✓✓✓
shorten
In skeletal muscle cells, the transverse tubule is an extension of the Ans✓✓✓
sarcolemma
In the following chemical reaction, which represents products?
AB+CD -----> AD+CB Ans✓✓✓ AD+CB
Most homeostatic mechanisms involve__________, a way of counteracting a
change Ans✓✓✓ negative feedback mechanisms
Put the epidermis in the correct order starting with the deepest layer
a) stratum granulosum
b) stratum corenum
c) statum basale
