Lecture Exam 2 (B)

A  1, 7, 4, 6, 3, 2, 9, 8, 5

B  1, 4, 7, 2, 3, 9, 6, 5, 8

C  1, 4, 2, 3, 5, 6, 9, 8, 7

D  1, 4, 7, 2, 3, 6, 9, 8, 5

A  They receive synaptic input from other neurons in the CNS.

B  They can transmit information between afferent neurons and efferent neurons.

C  They make synapses on effector organs in the PNS.

D  They deliver synaptic input on other neurons.

E  They sum excitatory and inhibitory synaptic inputs.

A  The exocytosis of neurotransmitter

B  The repolarization phase of the action potential

C  The graded potential

D  All of these will not occur

E  The depolarization phase of the action potential

A  somatic, catalyst

B  bipolar, ganglion

C  horizontal, inner

A  Black, White

B  Gray, White

C  Brown, Gray

D  White, Gray

A  TRUE

B  FALSE

A  Primary Auditory cortex

B  Primary Visual cortex

C  Somatosensory cortex

D  Occipital lobe association area

E  Parietal lobe association area

A  activation of the sympathetic nervous system.

B  flatteningof the lens.

C  increased rounding of the cornea.

D  contraction of the ciliary muscles.

E  dilation of the pupil.

A  1,4,7,8,3,2,6,5,9,10

B  1,3,2,5,7,6,8,4,9,10

C  1,3,2,6,5,9,10,4,8,7

D  1,4,8,7,3,2,5,6,9,10

A  Cold and warmth

B  Pressure

C  Proprioception

D  Sound

E  Vision

F  pain

A  trigger an action potential.

B  trigger an excitatory postsynaptic potential.

C  depolarize a dendrite.

D  be conducted to the axon hillock.

E  cause a change in membrane potential.

A  Refraction

B  Retraction

C  Deflection

D  Reflection

A  The cornea refracts light rays more strongly than the lens.

B  The image of an object that is focused on the retina is upside down relative to the object’s actual position in space.

C  Cataract is an increase in opacity (clouding) of the lens.

D  Myopia is a condition in which the lens focuses light from distant objects behind the retina.

E  Presbyopia is a condition in which the lens cannot accommodate adequately for near vision.

A  globus pallidus

B  cingulate gyrus

C  caudate nucleus

D  substantia nigra

E  mammilary body

F  putamen

A  both pens are activating the same receptor.

B  both afferent neurons converge on the same interneuron.

C  both sensations are grouped together in the somatosensory cortex.

D  the receptors in both skin areas utilize the same afferent neuron.

A  carry impulses from the periphery to the CNS.

B  carry impulses from the CNS to the periphery.

C  are part of the peripheral nervous system.

D  transmit signals derived from afferent receptors up the spinal cord to the brain.

E  relay messages from the brain down to the spinal cord to efferent neurons.

A  inhibits muscle tone throughout the body.

B  controls thirst, urine output, and food intake.

C  is a relay station for sensory input on its way to the cerebral cortex.

D  plays a role in emotional and behavioral patterns.

E  functions as the body’s thermostat

F  secretes hormones

A  lens

B  ciliary muscle

C  retina

D  cornea

E  iris

A  is comprised of lower motor neurons controlled by local circuit neurons and upper motor neurons arising from the cerebellum

B  occurs in unmyelinated nerve fibers.

C  always results in muscle contraction

D  is comprised of lower motor neurons controlled by local circuit neurons

E  is comprised of lower motor neurons controlled by upper motor neurons arising from the motor cortex

A  norepinephrine

B  acetylcholine

C  histamine

D  serotonin

A  acetylcholine

B  serotonin

C  histamine

D  dopamine

A  serotonin

B  acetylcholine

C  histamine

D  norepinephrine

A  norepinephrine

B  acetylcholine

C  histamine

D  dopamine

A  dopamine

B  serotonin

C  norepinephrine

D  acetylcholine

A  Conversion of the energy of a stimulus into a pattern of electrical activity

B  Persistence of the sensation of a limb even after it has been severed from the body

C  A decrease in receptor sensitivity despite continuation of a stimulus

D  A depolarization of receptive membrane that increase in magnitude as the stimulus intensity increases

E  Information from sensory receptorsreaches the cerebral cortex and the person becomes aware of it

A  photoreceptor

B  nociceptor

C  thermoreceptor

D  chemoreceptor

A  mechanoreceptor

B  nociceptor

C  thermoreceptor

D  chemoreceptor

A  thermoreceptor

B  nociceptor

C  photoreceptor

D  chemoreceptor

A  photoreceptor

B  chemoreceptor

C  thermoreceptor

D  mechanoreceptor

A  chemoreceptor

B  nociceptor

C  thermoreceptor

D  photoreceptor

A  thermoreceptor

B  chemoreceptor

C  nociceptor

D  photoreceptor

A  All of the answer choices are correct.

B  A chemical within the jalepeño acts as a stimulus for thermoreceptors.

C  Chemoreceptors can activate heat sensing parts of the brain.

D  Friction while chewing activates thermoreceptors.

E  The breakdown of chemicals within the pepper causes exothermic reactions in the mouth.

A  There are four different chromophore moleculesin the retina.

B  Photoreceptors are neurons.

C  There are four different opsins in the retina.

D  There are normally four different photopigments in the retina.

E  There are two basic types of photoreceptors in the retina, rods, and cones.

A  anterior spinothalmic tract

B  lateral corticospinal tract

C  the posterior column

D  medial leminscus tract

E  spinocerebellar tract

A  occipital lobes of the cerebral cortex

B  frontal lobes of the cerebral cortex

C  temporal lobes of the cerebral cortex

D  limbic system

E  somatosensory cortex

A  Na+/K+ pumps.

B  K+ leak channels.

C  Na+ leak channels

D  Na+ voltage-gated channels.

A  parassympathetic

B  parasympathetic

C  assympathetic

D  sympathetic

A  The term “sensory unit” refers to a group of receptors that receive a particular stimulus and the afferent neuron associated with those receptors.

B  Some sensory receptors are modifications of the peripheral endings of efferent neurons.

C  All sensory information that reaches the brain can be experienced as a conscious sensation.

D  The term “adequate stimulus” means that a stimulus is strong enough to be detected.

E  Sensory information that leads to conscious awareness of the stimulus is called transduction.

A  thermoreceptor

B  chemoreceptor

C  photoreceptor

D  mechanoreceptor

A  equal to the equilibrium potential for potassium.

B  equal to the equilibrium potential for sodium.

C  slightly more negative than the equilibrium potential of potassium ion.

D  more positive than the equilibrium potential for sodium.

E  more positive than the equilibrium potential for potassium.

A  3, 1, 4, 5, 2

B  2, 1, 5, 4, 3

C  1, 4, 3, 2, 5

D  5, 4, 3, 1, 2

E  1, 2, 3, 5, 4

A  Terminal ganglia give rise to sympathetic neurons

B  The terminal ganglia contain muscarinic receptors.

C  Terminal ganglia are the final common pathway for the autonomic nervous system.

D  Terminal ganglia lie in a chain located along either side of the spinal cord.

E  the otic ganglia are found near the parotid gland

F  Long parasympathetic preganglionic fibers end at the terminal ganglia, which lie in or near the effector organ.

A  The patient would perceive nothing.

B  The patient would perceive a general sensation over one side of the body.

C  The patient would perceive a general sensation all over the body.

D  The patient would perceive a specific, localized sensation in one body area.

A  Hypothalamus

B  Pineal gland

C  Pituitary gland

D  Mitochondria

A  Near vision (e.g., reading a book)

B  Both near and distance vision are compromised

C  Both near and distance vision are fine, but changing back and forth between them becomes difficult

D  No light will enter the eye and blindness will result

E  Distance vision (e.g., reading a street sign)

A  It maintains a concentration gradient for K + such that diffusion forces favor movement of K + into the cell.

B  It pumps 3 Na + ions into the cell for every 2 K + ions it pumps out.

C  It maintains an electrical gradient at the equilibrium potential of K +.

D  It generates a small electrical potential such that the inside of a neuron is made negative with respect to the outside.

E  It transports equal numbers of sodium and potassium ions with each pump cycle.

A  It is not altered by changing concentration gradients of permeating ions.

B  Only nerve and muscle cells have a potential difference across the membrane at rest.

C  in neurons, it is created mainly by potassium ion leakage

D  It requires ions to be distributed unevenly across the plasma membrane of a cell.

E  It is oriented so that the cell’s interior is negative with respect to the extracellular fluid.

F  It has the same value in all cells.

A  lower motor neurons

B  upper motor neurons

C  gamma motor neurons

D  nictonic motor neurons

E  delta motor neurons

A  cingulate gyrus.

B  primary visual cortex

C  amygdala.

D  mammillary body.

E  hippocampus.

F  olfactory bulb

A  They are action potentials.

B  They always trigger action potentials.

C  They propagate without decrement.

D  They generally occur at the axon hillock of afferent neurons.

E  They can be graded and vary with stimulus strength.

A  FALSE

B  TRUE

A  is found in the soma of the neuron

B  is where action potentials are first generated.

C  contains voltage-gated channels.

D  contains ligand-gated channels

E  is located in the axon hillock.

A  FALSE

B  TRUE

A  muscarinic

B  adrenergic

C  nicotinic

A  The plasma membrane is completely impermeable to sodium ions.

B  The concentration of sodium ion is greater inside the cell than outside.

C  The plasma membrane is completely impermeable to potassium ions.

D  The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions.

E  The plasma membrane is most permeable to sodium ions.

A  glaucoma.

B  presbyopia.

C  cataract.

D  hyperopia.

E  myopia.

A  TRUE

B  FALSE

A  when stimulated send impulses both to the limbic system and to the cortex for perception of smell.

B  are replaced by cells known as basal cells.

C  bind chemicals called odorants

D  are specialized endings of afferent neurons called chemoreceptors

A  FALSE

B  TRUE

A  plays a role in controlling eye movement together with the inner ear.

B  contains numerous nuclei connected by a network of white matter tracts.

C  compares the intentions of the higher motor centers with the performance of the muscles and corrects this information resulting in coordinated muscle movements

D  can be consciously controlled.

E  is important for the maintenance of balance.

A  she suddenly develops presbyopia.

B  activation of her parasympathetic nerves causes sudden contraction of her ciliary muscles.

C  activation of her parasympathetic nerves inhibits contraction of her ciliary muscles.

D  activation of her sympathetic nerves inhibits contraction of her ciliary muscles.

E  activation of her sympathetic nerves causes sudden contraction of her ciliary muscles.

A  their activity is influenced by upper motor neurons

B  they secrete dopamine

C  they exit from the anterior gray horn

D  they are also known as somatic motor neurons

E  they can excite or inhibit skeletal muscles

F  they are part of the final common pathway

A  bleaching of opsin.

B  excitation of bipolar cells

C  closure of Na+ channels and decreased Na+ flow into the photoreceptor

D  decreased depolarization of the photoreceptor’s plasma membrane

E  increased neurotransmitter release from the synaptic terminal of the photoreceptor.

A  afferent, sensory neurons are unipolar neurons with cell bodies located in the dorsal root ganglion

B  the dorsal root conducts motor information

C  spinal nerves are for the conduction of motor information only

D  the ventral root contains axons of afferent, sensory neurons

A  bind acetylcholine released from parasympathetic preganglionic fibers.

B  are found primarily in the heart.

C  bind acetylcholine released from both sympathetic and parasympathetic postganglionic fibers.

D  bind acetylcholine released from both sympathetic and parasympathetic preganglionic fibers.

E  bind with norepinephrine released from sympathetic postganglionic fibers.

A  Photoreceptors

B  Mechanoreceptors

C  Nociceptors

D  Proprioceptors

E  Chemoreceptors

A  The chromophore retinal undergoes a change of shape.

B  The photoreceptor cell membranebecomes depolarized.

C  The photoreceptor cells are stimulated and fireaction potentials.

D  The concentration of cyclic GMP inside cells increases.

E  There is an increase in neurotransmitter release from photoreceptor cells.

A  Loss of pain in the left foot

B  Loss of pain in the right foot

C  Loss of both pressure sense and pain in the right foot

A  increased fluid pressure against the cochlear duct by the fluid of the scala vestibuli

B  movement of the tectorial membrane relative to the vestibular

C  the hairs of the receptor cells of the Organ of Corti to be bent

D  displacement of the round window, which dissipates pressure in the cochlea.

E  movement of the basilar membrane relative to the tectorial.