BMS 300 LATEST 2026 CORE EXAM TEST QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔ice floats on water because it is _____ dense than liquid water. This is due to the
rigid, lattice-like structure formed by hydrogen bonds when water freezes, which spaces
the molecular ____ than they are in liquid form - ✔✔less, farther apart
✔✔____ bonds are responsible for the primary structure of proteins - ✔✔peptide
✔✔calcium homeostasis is maintained by the endocrine system. When blood calcium
levels increase beyond the normal level, the _____ releases calcitonin. When calcium
levels decrease beyond the normal level, the ____ releases parathyroid hormone -
✔✔thyroid gland, parathyroid gland
✔✔adrenocorticotropic hormone (ACTH) acts on the ____ in the adrenal cortex to
influence blood glucose levels - ✔✔zona fasciculata
✔✔if you encounter a bear on campus, ____ neurons in the sympathetic division of the
autonomic nervous system may deliver ____ to the target organs - ✔✔postganglionic,
epinephrine
✔✔binding of a ligand in the postsynaptic terminal causes the efflux of K+ ions thereby
resulting in a(n) _____ - ✔✔inhibitory postsynaptic potential (IPSP)
✔✔damage to the right side of the spinal cord above the level of the legs would cause
which of the following clinical symptoms - ✔✔loss of crude touch sensation on the left
side
✔✔hormones that are ____ diffuse across plasma membrane and bind to receptors
inside cell, whereas hormones that are ____ bind to receptor proteins on outer surface
of plasma membrane and activate secondary messengers - ✔✔hydrophobic, hydrophilic
✔✔a decrease in blood pressure triggers the renin-angiotensin-aldosterone system
(RAAS). In this system, angiotensin II stimulates ____ secretion from the adrenal
cortex, which will increase the expression of NA/K pumps in the kidneys -
✔✔aldosterone
✔✔mammary glands are examples of ____ exocrine glands because a part of the cell
pinches off to release the secretions - ✔✔apocrine
✔✔during the absolute refractory period, an action potential will not ensue regardless of
stimulus strength. this is bc ____ - ✔✔inactivation gates for voltage gated Na channels
are closed
, ✔✔when would you assume the highest levels of melatonin are secreted by the pineal
gland - ✔✔11pm
✔✔a(n)______ potential is a temporary and localized change in the membrane potential
in the cell body of a neuron, whereas a(n) membrane potential is the membrane
potential of an unstimulated neuron - ✔✔graded, resting
✔✔gonadotropin releasing hormone (GnRH) leads to increased release of _____ which
stimulates the testis to facilitate spermatogenesis - ✔✔follicle stimulating hormone
(FSH)
✔✔what type of glial cell functions in the myelination of axons in the peripheral nervous
system (PNS) - ✔✔neurolemmocytes/schwann cells
✔✔an increase in blood osmolarity (solute concentration) would be detected by
osmoreceptors in the hypothalamus and trigger the release of ____ from the posterior
pituitary gland - ✔✔antidiuretic hormone (ADH)
✔✔using the 3 box model of a neuron, what section of the neuron receives information
from other neurons - ✔✔cell body
✔✔blocking ____ sodium and potassium channels can impair the propagation of action
potentials along the axon - ✔✔voltage gated
✔✔when epinephrine binds to a G protein coupled receptor, the binding of ____ to the
adenyl cyclase enzyme will increase the intercellular levels of cAMP - ✔✔G alpha s
✔✔one of the functions of ____ in the CNS is the regulation of neurotransmitter
homeostasis, as they uptake neurotransmitters released in the synapse, metabolize
them, and release their precursors back to neurons - ✔✔astrocytes
✔✔In an ____ axon, an action potential moves along by saltatory propagation, so it
travels ____ than in a(n) ____ axon - ✔✔myelinated, faster, unmyelinated
✔✔the hypothalamus controls the posterior pituitary function through ___ and neural
stimuli, whereas it controls the endocrine function of the anterior pituitary through _____
stimulus - ✔✔humoral, hormonal
✔✔when a baby suckles at the breast, milk is synthesized in response to ____ and
ejected in response to ______ - ✔✔prolactin, oxytocin
ANSWERS GUARANTEE A+
✔✔ice floats on water because it is _____ dense than liquid water. This is due to the
rigid, lattice-like structure formed by hydrogen bonds when water freezes, which spaces
the molecular ____ than they are in liquid form - ✔✔less, farther apart
✔✔____ bonds are responsible for the primary structure of proteins - ✔✔peptide
✔✔calcium homeostasis is maintained by the endocrine system. When blood calcium
levels increase beyond the normal level, the _____ releases calcitonin. When calcium
levels decrease beyond the normal level, the ____ releases parathyroid hormone -
✔✔thyroid gland, parathyroid gland
✔✔adrenocorticotropic hormone (ACTH) acts on the ____ in the adrenal cortex to
influence blood glucose levels - ✔✔zona fasciculata
✔✔if you encounter a bear on campus, ____ neurons in the sympathetic division of the
autonomic nervous system may deliver ____ to the target organs - ✔✔postganglionic,
epinephrine
✔✔binding of a ligand in the postsynaptic terminal causes the efflux of K+ ions thereby
resulting in a(n) _____ - ✔✔inhibitory postsynaptic potential (IPSP)
✔✔damage to the right side of the spinal cord above the level of the legs would cause
which of the following clinical symptoms - ✔✔loss of crude touch sensation on the left
side
✔✔hormones that are ____ diffuse across plasma membrane and bind to receptors
inside cell, whereas hormones that are ____ bind to receptor proteins on outer surface
of plasma membrane and activate secondary messengers - ✔✔hydrophobic, hydrophilic
✔✔a decrease in blood pressure triggers the renin-angiotensin-aldosterone system
(RAAS). In this system, angiotensin II stimulates ____ secretion from the adrenal
cortex, which will increase the expression of NA/K pumps in the kidneys -
✔✔aldosterone
✔✔mammary glands are examples of ____ exocrine glands because a part of the cell
pinches off to release the secretions - ✔✔apocrine
✔✔during the absolute refractory period, an action potential will not ensue regardless of
stimulus strength. this is bc ____ - ✔✔inactivation gates for voltage gated Na channels
are closed
, ✔✔when would you assume the highest levels of melatonin are secreted by the pineal
gland - ✔✔11pm
✔✔a(n)______ potential is a temporary and localized change in the membrane potential
in the cell body of a neuron, whereas a(n) membrane potential is the membrane
potential of an unstimulated neuron - ✔✔graded, resting
✔✔gonadotropin releasing hormone (GnRH) leads to increased release of _____ which
stimulates the testis to facilitate spermatogenesis - ✔✔follicle stimulating hormone
(FSH)
✔✔what type of glial cell functions in the myelination of axons in the peripheral nervous
system (PNS) - ✔✔neurolemmocytes/schwann cells
✔✔an increase in blood osmolarity (solute concentration) would be detected by
osmoreceptors in the hypothalamus and trigger the release of ____ from the posterior
pituitary gland - ✔✔antidiuretic hormone (ADH)
✔✔using the 3 box model of a neuron, what section of the neuron receives information
from other neurons - ✔✔cell body
✔✔blocking ____ sodium and potassium channels can impair the propagation of action
potentials along the axon - ✔✔voltage gated
✔✔when epinephrine binds to a G protein coupled receptor, the binding of ____ to the
adenyl cyclase enzyme will increase the intercellular levels of cAMP - ✔✔G alpha s
✔✔one of the functions of ____ in the CNS is the regulation of neurotransmitter
homeostasis, as they uptake neurotransmitters released in the synapse, metabolize
them, and release their precursors back to neurons - ✔✔astrocytes
✔✔In an ____ axon, an action potential moves along by saltatory propagation, so it
travels ____ than in a(n) ____ axon - ✔✔myelinated, faster, unmyelinated
✔✔the hypothalamus controls the posterior pituitary function through ___ and neural
stimuli, whereas it controls the endocrine function of the anterior pituitary through _____
stimulus - ✔✔humoral, hormonal
✔✔when a baby suckles at the breast, milk is synthesized in response to ____ and
ejected in response to ______ - ✔✔prolactin, oxytocin
