Neuroscience Final Exam Multiple Choice Latest

Neuroscience Final Exam Multiple Choice Latest Update - Sources with 125 Questions and Verified Correct Answers Golden Ticket to Guaranteed A+ Verified by Professor

A scientist looks through a microscope at the structure of a neuron. The scientist notices a layer of molecules separating the neuron's intracellular space from the extracellular space. What is this part of the cell?

• Organelle
• Soma
• Neuronal Membrane

D) Nuclear Envelope - CORRECT ANSWER: C) Neuronal membrane

Absolute refractory period - CORRECT ANSWER: Period after a nerve impulse fires

where the neuron can't fire again due to the inactivated voltage-gated sodium channel

At what points do the somatic sensory axons enter the spinal cord?

• dorsal roots
• ventral roots
• dorsal root ganglia

d) ventral root ganglia - CORRECT ANSWER: a) dorsal roots

Axon hillock - CORRECT ANSWER: Protrusion from the soma where axon begins; site

of nerve impulse

Axons of the nervous systems are described as afferent and efferent according to the direction in which they carrey information. Which is an afferent projection?

• sensory input to the spinal cord 1 / 3

• motor output of the spinal cord
• interneurons of the spinal cord
• sensory input to the spinal cord, motor output of the spinal cord, interneurons in the

spinal cord - CORRECT ANSWER: b) motor output of the spinal cord

Brain slices are bathed in a concentrated K+ solution to stimulate neurotransmitter release. Why must Ca++ ions also be present in the bathing solution?

• it causes a large membrane depolarization
• it keeps the brain slices alive
• transmitter release requires the entry of Ca++ into the axon terminal

d) it stimulates many synapses in a region of the brain - CORRECT ANSWER: c)

transmitter release requires the entry of Ca++ into the axon terminal

Cell theory - CORRECT ANSWER: all organisms are made of cells;

cells>tissues>organs>organ systems>organisms

Concentration gradient - CORRECT ANSWER: Tendency of flow from high to low

concentration when two areas are not at equilibrium

Depolarization - CORRECT ANSWER: Process of membrane potential becoming less

negative; occurs with influx of Na+

Diffusion - CORRECT ANSWER: ???

Distinguish between the "head" and "tail" of phospholipids:

• The phosopholipids have a nonpolar "head" and polar "tail"
• The phosopholipids "head" contains hydrophilic phosphate and "tail" contains a

hydrophobic hydrocarbon

• The phospholipid "head" is hydrophobic and the hydrocarbon "tail" is hydrophilic 2 / 3

• The phospholipid "heads" face each other and "tails " face the watery extracellular

and intracellular environments - CORRECT ANSWER: B) The phosopholipids "head" contains hydrophilic phosphate and "tail" contains a hydrophobic hydrocarbon

Equilibrium potential - CORRECT ANSWER: Voltage at which ions and and their electric charges are balanced inside and outside of cell membrane

Essay Question on Exam 1 - CORRECT ANSWER: Essay Question on Exam 1

Galen's study of sheep brains was the basis for a theory of brain function that prevailed for almost 1500 years. Which represents this view?

• The heart is the center of intellect and the brain is the cooling system
• Ventricular localization of brain function
• Mind brain duality
• Parceling the cerebrum into lobes - CORRECT ANSWER: B) Ventricular localization

of brain function

How are released neurotransmitters cleared from the synaptic cleft?

• enzymatic destruction and diffusion
• exocytosis
• endocytosis

D) all of the above - CORRECT ANSWER: A) enzymatic destruction and diffusion

How do the lipids of the neuronal membrane contribute to the neuronal membrane potential?

• Encourages chemical interactions with water
• Catalyzes chemical reactions
• Integrates cytosol of neuron with extracellular fluid

D) Forms a barrier to water-soluble ions and water - CORRECT ANSWER: D) Forms a

barrier to water soluble ions and water

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