Q: Which equation best describes the Nernst potential for a single ion species?

$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{out}}}{[\text{ion}]_{\text{in}}} \right)$$

Question 1

During the rising phase of an action potential, which ion channels are primarily responsible for the rapid depolarization of the neuron membrane?

Accepted Answer

Voltage-gated Na$$^+$$ channels

Question 2

Which glial cell is responsible for producing cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

Ependymal cells

Question 3

A patient presents with progressive, uncontrollable motor movements and is diagnosed with Huntington's disease. Which part of the brain is primarily affected in this condition?

Accepted Answer

Basal ganglia

Question 4

Which pathway carries motor commands to distal skeletal muscles, such as those used for writing with fingers?

Accepted Answer

Lateral corticospinal pathway

Question 5

Which neural structure functions to transmit electrical signals (action potentials) to the axon terminal?

Accepted Answer

Axon

Question 6

During repolarization of the neuron membrane, which ion channels are mostly open?

Accepted Answer

Voltage-gated K$$^+$$ channels

Question 7

Which equation can be used to calculate the change in flow rate due to different vessel radii based on Poiseuille's Law?

Accepted Answer

$$Q = \frac{\Delta P \cdot \pi \cdot r^4$}{8 \cdot \eta \cdot l}$$

Question 8

Which part of the brain is responsible for the initiation and control of motor patterns for movements of skeletal muscles?

Accepted Answer

Primary motor cortex

Question 9

How does cerebrospinal fluid (CSF) flow from the third ventricle to the fourth ventricle?

Accepted Answer

Through the cerebral aqueduct

Question 10

Which term describes a collection of axons in the central nervous system?

Accepted Answer

Tracts

Question 11

A patient is unable to interpret language but can produce speech. Which brain area is most likely damaged?

Accepted Answer

Wernicke's area

Question 12

Which division of the nervous system is responsible for 'rest and digest' functions?

Accepted Answer

Parasympathetic division

Question 13

Which of the following is a function of acetylcholinesterase in the synaptic cleft?

Accepted Answer

Breaks down acetylcholine into acetate and choline

Question 14

Which brain vesicle, the prosencephalon, gives rise to which adult brain structure?

Accepted Answer

Cerebrum

Question 15

Which part of the neuron receives incoming signals from other neurons?

Accepted Answer

Dendrite

Question 16

Which disease is characterized by progressive loss of memory and cognitive function, often associated with amyloid plaques?

Accepted Answer

Alzheimer's disease

Question 17

Which equation best describes the Nernst potential for a single ion species?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{out}}}{[	ext{ion}]_{	ext{in}}} ight)$$

Question 18

Which part of the brain is primarily responsible for the coordination and fine-tuning of voluntary movements?

Accepted Answer

Cerebellum

Question 19

A lesion in the lateral corticospinal tract would most likely result in which clinical symptom?

Accepted Answer

Impaired fine motor control of distal limbs

Question 20

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

Prevents passage of most large molecules and pathogens into the brain

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