Lecture Exam 2

A  TRUE

B  FALSE

A    

B  atrophy of the anterior pituitary gland; loss of negative feedback by thyroid hormones

C  atrophy of the thyroid gland; loss ofnegative feedback by thyroid hormones and increased thyroid-stimulating hormone (TSH) levels

D  a goiter; loss of negative feedback by thyroid hormones and increased thyroid-stimulating hormone (TSH) levels

E  atrophy of the thyroid gland; decreased sensitivity of receptors for thyroid-stimulating hormone (TSH)

F  a goiter; increased production of thyroid-stimulating hormone (TSH) and increased thyroid hormone levels

A  The adrenal gland will atrophy and plasma cortisol levels will be reduced.

B  The adrenal gland will hypertrophy to increase cortisol production.

C  The subject will remain euthyroid.

D  There will be increased negative feedback on growth hormone by insulin-like growth factor 1 (IGF-1).

E  The hypothalamus will secrete less CRH.

A  TRUE

B  FALSE

A  Testing plasma levels of dopamine

B  Testing plasma levels of follicle-stimulating hormone

C  Testing plasma levels of cortisol

D  Testing plasma levels of parathyroid hormone

E  Testing plasma levels of growth hormone

A  On the cell surface

B  In the cytoplasm

C  In the blood stream

D  Any of these might be places where the receptor could be found.

A  Growth hormone

B  Thyroid hormone

C  Oxytocin

D  Progesterone

E  Estrogen

A  Skeletal muscle, stored in terminal cisternae

B  Liver, inside the endoplasmic reticulum

C  Bones, in the form of hydroxyapatites

D  Blood, dissolved within the plasma

E  Embedded in collagen in many types of connective tissue

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Stimulating the release of gonadotropin-releasing hormone (GnRH)

B  Inducing the secretion of steroid hormones by the gonads in both males and females

C  Inhibiting the release of growth hormone

D  Inhibiting the release of prolactin

E  Stimulating the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH)

A  Prolactin

B  Cortisol

C  ACTH

D  Follicle-stimulating hormone

E  Insulin-like growth factor 1

A  begin in the cortex of the cerebellum.

B  consist of many interneurons linked synaptically.

C  are composed of alpha motor neurons.

D  bring sensory information from the spinal cord to the somatosensory region of the cerebral cortex.

E  are descending motor pathways.

A  Alpha motor neurons stimulate contraction of intrafusal fibers in extensor muscles.

B  Golgi tendon organs in the patellar tendon stimulate the contraction of extrafusal fibers of extensor muscles.

C  Alpha motor neurons stimulate contraction of extrafusal fibers in extensor muscles.

D  Alpha motor neurons that innervate ipsilateral flexor muscles are stimulated.

E  Inhibitory interneurons reduce action potential firing in alpha motor neuronsto extrafusal fibers of extensor muscles.

A  FALSE

B  TRUE

A  They are not true muscle fibers because they cannot contract.

B  They function to maintain tension on spindle receptors.

C  Their contraction is stimulated by alpha motor neurons and inhibited by gamma motor neurons.

D  They are innervated by alpha motor neurons.

E  When stimulated to fire, they always inhibit flexor muscles.

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  It helps to coordinate body movements.

B  It stores the memory of motor movements that involve several joints.

C  It helps to coordinate body movements. It is important in maintaining posture. It receives input from sensory pathways. It stores the memory of motor movements that involve several joints.

D  It receives input from sensory pathways.

E  It is important in maintaining posture.

A  A nociceptor stimulated contraction of the ipsilateral flexor muscle and inhibited contraction of the ipsilateral extensor muscle.

B  An afferent neuron sent a signal in a monosynaptic reflex arc.

C  A nociceptor stimulated contraction of the contralateral flexor muscle and inhibits contraction of the contralateral extensor muscle.

D  A nociceptor initiated muscle spindle fibers.

E  A nociceptor stimulated the local Golgi tendon organ.

A  H zones shorten.

B  tension generated by the muscle always exceeds the load on the muscle.

C  tetanus occurs.

D  sarcomeres do not significantly shorten.

E  the whole muscle shortens.

A  actin.

B  troponin.

C  the thick filament.

D  tropomyosin.

E  myosin.

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  They manufacture and store ATP.

B  They store the calcium ions that are the main source of activation for the cross-bridge cycle.

C  They form the Z lines that mark the end of each sarcomere.

D  They allow action potentials to propagate deep into the center of skeletal muscle cells.

E  They run in parallel with the myofibrils, and have abundant Ca 2+-ATPase proteins for pumping Ca 2+ back into the sarcoplasmic reticulum.

A  FALSE

B  TRUE

A  No effects on her running

B  All muscle contractions after Sarah reaches her maximum heart rate (about 10 minutes into her run)

C  Every moment of Sarah’s runs

D  Just the first few seconds of exercise

E  All muscle contractions after Sarah reaches fatigue (about an hour into her run)

A  can only be excited, and not inhibited.

B  have abundant T-tubules.

C  have many gap junctions between cells.

D  generally have individual innervation of each cell.

E  respond to stretch by relaxing.

A  TRUE

B  FALSE

A  She has opened her eyes and is taking in visual information.

B  She is thinking about food.

C  She fell asleep.

D  She is talking.

E  She is moving.

A  both slow-wave sleep and paradoxical sleep.

B  slow-wave sleep.

C  paradoxical sleep.

D  neither slow-wave sleep nor paradoxical sleep.

A  A person with damage only to Broca’s area of the brain will understand spoken or written speech but will have difficulty speaking.

B  Both “a person with damage only to Broca’s area of the brain will understand spoken or written speech but will have difficulty speaking” and “a person with damage only to Wernicke’s area of the brain will have motor aphasia” are true.

C  A person with damage only to Wernicke’s area of the brain will have motor aphasia.

D  A person with damage only to Wernicke’s area of the brain will lose the ability to recognize faces.

E  Both “a person with damage only to Broca’s area of the brain will understand spoken or written speech but will have difficulty speaking” and “a person with damage only to Wernicke’s area of the brain will lose the ability to recognize faces” are true.

A  is due to receptor fatigue.

B  can be overcome by a stronger stimulus of the same type.

C  is due to denaturation of the receptor.

D  is permanent.

E  is a result of decreased neurotransmitter release secondary to decreased calcium influx at synaptic terminals.

A  brain oxygen consumption is lower than when awake.

B  skeletal muscle tension is dramatically increased, brain oxygen consumption is lower than when awake, brain neurotransmitter activity in the pathways regulating states of consciousness is similar to that in the awake state and the person is easily aroused

C  brain neurotransmitter activity in the pathways regulating states of consciousness is similar to that in the awake state.

D  skeletal muscle tension is dramatically increased.

E  the person is easily aroused.

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  lateral geniculate cells.

B  bipolar cells.

C  rod cells.

D  cone cells.

E  ganglion cells.

A  Bipolar cells spontaneously depolarize in the absence of input from photoreceptor cells.

B  Only cones are associated with bipolar cells of the “ON pathway,” rods are not.

C  Glutamate receptors on bipolar cells are excitatory.

D  Bipolar cells fire action potentials only when bright light strikes the photoreceptors linked to them.

E  Bipolar cells hyperpolarize in the absence of input from photoreceptor cells.

A  rod cells.

B  lateral geniculate cells.

C  cone cells.

D  bipolar cells.

E  ganglion cells.

A  Mechanoreceptors

B  Nociceptors

C  Photoreceptors

D  Chemoreceptors

A  occipital lobes of the cerebral cortex

B  frontal lobes of the cerebral cortex

C  somatosensory cortex

D  limbic system

E  temporal lobes of the cerebral cortex

A  nociceptors.

B  somatic receptors.

C  baroreceptors.

D  hair cells.

E  Pacinian corpuscles.

A  FALSE

B  TRUE

A  Voltage-gated Na + channels are opened.

B  The permeability to K + increases greatly while that to Na + decreases.

C  The permeability to Na + increases greatly.

D  ATPase destroys the energy supply that was maintaining the action potential at its peak.

E  The Na +, K + pump restores the ions to their original locations inside and outside of the cell.

A  proteins associated with synaptic vesicles.

B  dyenin proteins.

C  lysosomal proteins.

D  kinesin proteins.

E  smooth endoplasmic reticulum.

A  is a catecholamine neurotransmitter.

B  has an excitatory effect on pathways that mediate sensations.

C  is a neuropeptide.

D  acts asa neuromodulator.

E  has an inhibitory effect on pathways that are involved in the control of muscles.

A  Drowsiness

B  None of the answer choices are correct

C  Muscle relaxation

D  Muscle paralysis

E  Muscle cell twitches (contractions)

A  FALSE

B  TRUE

A  FALSE

B  TRUE

A  Opiate drugs, such as morphine, are antagonists of a class of neurotransmitters called endorphins.

B  Acetylcholine is broken down by enzymes present on postsynaptic cell membranes.

C  Catecholamines are the most abundant neurotransmitters in the central nervous system.

D  Gamma-aminobutyric acid (GABA) is a major excitatory transmitter in the central nervous system.

E  Acetylcholine that is released at synapses binds to adrenergic receptors in the postsynaptic cell membrane.