#1 For which of the following functions do active neurons require a supply of AT
ID: 163164 • Letter: #
Question
#1 For which of the following functions do active neurons require a supply of ATP?
A) powering the sodium-potassium exchange pump
B) axoplasmic transport
C) synthesis and reuptake of neurotransmitters
D) all of the above
E)A and C only
#2 A viral disease that destroys the cells of the anterior gray horn will
A) lead to muscle weakness or paralysis.
B) block autonomic regulation.
C) interfere with position sense.
D) mainly interfere with crude touch and temperature sense.
E) all of the above
#3 [r an adult, the conus medullaris is found at about
A) T6-. B) L1-. C) T10-. D) L5-. E) C01-.
#4 Which of the following is a function of neuroglia?
A) produce cerebrospinal fluid
B) provide a supportive framework
C) regulate the composition of interstitial fluid
D) act as phagocytes
E) all of the above
#5 Damage to the preoptic area of the hypothalamus leads to whidr problem?
A) reduced ability to regulate body temperature
B) production of a large volume of urine
C) an intense thirst
D) an insatiable appetite
E) an uncontrolled sex drive
#6 Hydrocephalus or "water on the brain" may
A) result from excessive water intake.
B) result from excessive production of cerebrospinal fluid.
C) result from blockage of circulation of CSF.
D) result from deficient production of cerebrospinal fluid.
E)B or C
#7 ______ is a disorder affecting the ability to speak or read.
A) Apraxia
B) Ataxia
C) Aphasia
D) Bell palsy
E) all of the above
#8 Duing sympathetic activation _____ occurs.
A) elevated blood pressure
B) elevated heart rate
C) elevated blood giucose
D) sweating
E) all of the above
#9 Which of the following interactions between electrical and chemical gradients does not lead to the establishment of a neuron's resting potential?
A) Potassium ions are repulsed by positive charges outside the cell.
B) Chemical forces tend to drive potassium ions out of the cell.
C) Chemical and electrical forces both favor sodium ions entering the cell.
D) Potassium ions are attracted to the negative charges inside the cell.
E) Electrical forces push sodium ions out of the cell.
#10 The all-or-none principle states that
A) all stimuli great enough to bring the membrane to threshold will produce identical action
potentials.
B) all stimuli will produce identical action potentials.
C) only motor stimuli can activate action potentials.
D) the greater the magnitude of the stimuli, the greater the magnitude of the action potential.
E) only sensory stimuli can activate action potentials.
#11 Your uncle was just diagnosed with a heart attack. One of his major symptoms is left arm pain. You are not surprised because you are familiar with the phenomenon of
A) somatic pain.
B) psychogenic pain.
C) phantom pain.
D) neurogenic pain.
E) referred pain.
#12 The layer of the meninges in direct contact with the spinal cord is the
A) arachnoid.
B) dura mater.
C) c-horoid plexus.
D) subarachnoid space.
E) pia mater.
#13 The myelin sheath that covers many CNS axons is formed by
A) oligodendrocytes.
B) satellite cells.
C) ependymal cells.
D) astrorytes.
E) microglia.
#14 Deteriorating changes in the distal segment of an axon as a result of a break between it and the
soma is called _____ degeneration.
A) neural
B) Wallerian
C) conduction
D) central
E) peripheral
Explanation / Answer
1. Option D is the right answer. All of these functions requires ATP. The movement of materials to and from soma to axoplasm is requires ATP. Recovery from action potential also requires ATP and recycling of neurotransmitters also requires energy in the form of ATP.
2. Option A is the right answer. This virus refers to polio virus which results in poliomyelitis.
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