Q: Which equation correctly represents the Nernst equation for calculating the equilibrium potential of an ion across a membrane?

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

Question 1

Which of the following best describes the three general functions of the nervous system?

Accepted Answer

Sensory input, integration, and motor output

Question 2

A patient suffers damage to the spinal cord at the level of the first lumbar vertebra. Which nervous system division is directly affected?

Accepted Answer

Central Nervous System (CNS)

Question 3

Which of the following is TRUE regarding the structural classification of neurons?

Accepted Answer

Multipolar neurons have one axon and multiple dendrites

Question 4

Which equation correctly represents the Nernst equation for calculating the equilibrium potential of an ion across a membrane?

Accepted Answer

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

Question 5

Which of the following best describes the difference between EPSP and IPSP?

Accepted Answer

EPSP depolarizes the postsynaptic membrane, while IPSP hyperpolarizes it

Question 6

A neurotransmitter binds to a receptor and directly opens a sodium channel. This is an example of:

Accepted Answer

Direct action of a neurotransmitter

Question 7

Which of the following is a function of neuroglia (supporting cells) in the nervous system?

Accepted Answer

Providing metabolic and structural support to neurons

Question 8

Which pathway carries sensory information from the body to the CNS?

Accepted Answer

Afferent pathway

Question 9

Which of the following is TRUE about chemical synapses?

Accepted Answer

They use neurotransmitters to transmit signals between neurons

Question 10

A patient is unable to regulate their heart rate and blood pressure after a traumatic injury. Which division of the nervous system is most likely affected?

Accepted Answer

Autonomic nervous system

Question 11

Which of the following is NOT a function of the nervous system?

Accepted Answer

Secretion of hormones into the bloodstream

Question 12

Which of the following best describes the role of the postsynaptic neuron at a synapse?

Accepted Answer

Receives the neurotransmitter and generates a response

Question 13

Which of the following is a correct sequence of events during an action potential?

Accepted Answer

Resting potential → depolarization → repolarization → hyperpolarization

Question 14

Which of the following is TRUE about the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

Sympathetic division prepares the body for 'fight or flight', while parasympathetic division promotes 'rest and digest'

Question 15

Which of the following is a correct description of cranial nerves?

Accepted Answer

They originate from or travel to the brain and there are 12 pairs

Question 16

Which of the following neurotransmitters is primarily excitatory in the CNS?

Accepted Answer

Glutamate

Question 17

A patient presents with muscle weakness and loss of sensation in the limbs. Which part of the nervous system is most likely affected?

Accepted Answer

Peripheral nervous system

Question 18

Which of the following is TRUE about electrical synapses?

Accepted Answer

They allow direct passage of ions between cells via gap junctions

Question 19

Which equation best represents Ohm's Law as applied to membrane potential?

Accepted Answer

$$V = IR$$

Question 20

A patient is unable to move their right arm after a stroke. Which functional division of the nervous system is most likely impaired?

Accepted Answer

Motor (efferent) division

Chapter 11: Introduction to the Nervous System - 11.1

Guida di studio - Domande di pratica

Study guide - Flashcard