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

$$\sum (EPSP) - \sum (IPSP) \geq \text{Threshold}$$

Question 1

Which of the following best describes the difference between the central nervous system (CNS) and the peripheral nervous system (PNS)?

Accepted Answer

The CNS consists of the brain and spinal cord, while the PNS includes all neural tissue outside the CNS.

Question 2

A patient touches a hot stove and immediately withdraws their hand. Which pathway correctly describes the flow of information in this reflex?

Accepted Answer

Receptor → afferent neuron → CNS → efferent neuron → effector

Question 3

Which neuroglial cell is primarily responsible for maintaining the blood-brain barrier and regulating the extracellular environment in the CNS?

Accepted Answer

Astrocyte

Question 4

Which part of the neuron is specialized for receiving incoming signals from other neurons?

Accepted Answer

Dendrites

Question 5

A neuron receives multiple excitatory postsynaptic potentials (EPSPs) in rapid succession at a single synapse. This is an example of:

Accepted Answer

Temporal summation

Question 6

Which statement best explains the all-or-none principle of action potentials?

Accepted Answer

Once threshold is reached, an action potential will always occur with the same amplitude, regardless of stimulus strength.

Question 7

Which equation correctly represents the calculation of membrane potential using the Nernst equation for a single ion?

Accepted Answer

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

Question 8

Saltatory conduction is faster than continuous conduction because:

Accepted Answer

Action potentials jump from one node of Ranvier to the next, skipping myelinated regions.

Question 9

Which of the following best describes the difference between EPSPs and IPSPs at a synapse?

Accepted Answer

EPSPs depolarize the postsynaptic membrane, increasing the likelihood of an action potential; IPSPs hyperpolarize it, decreasing the likelihood.

Question 10

A patient has damage to the posterior root of a spinal nerve. Which function is most likely to be affected?

Accepted Answer

Sensory input from the body to the CNS

Question 11

Which type of reflex arc involves only one synapse between the sensory and motor neuron?

Accepted Answer

Monosynaptic reflex

Question 12

Which neuronal circuit pattern is best illustrated by several presynaptic neurons converging on a single postsynaptic neuron?

Accepted Answer

Convergence

Question 13

Which brain region is primarily responsible for coordinating voluntary movements and maintaining balance?

Accepted Answer

Cerebellum

Question 14

A patient with damage to the hypothalamus would most likely experience problems with:

Accepted Answer

Regulation of body temperature and hormone release

Question 15

Which type of sensory receptor is responsible for detecting changes in muscle length and joint position?

Accepted Answer

Proprioceptor

Question 16

Fast pain is transmitted by which type of nerve fibers?

Accepted Answer

Type A fibers

Question 17

Which of the following best describes sensory adaptation?

Accepted Answer

A decrease in sensitivity to a constant stimulus over time

Question 18

Which equation best represents the threshold condition for firing an action potential in a neuron?

Accepted Answer

$$\sum (EPSP) - \sum (IPSP) \geq 	ext{Threshold}$$

Question 19

A patient is unable to recall emotional memories after a traumatic brain injury. Which brain system is most likely affected?

Accepted Answer

Limbic system

Question 20

Which of the following is a real-life example of a polysynaptic spinal reflex?

Accepted Answer

Withdrawal of the foot after stepping on a sharp object

Nervous Tissue and Nervous System: Study Guide Notes

Study Guide - Practice Questions