Question 1

Which of the following best describes the difference between primary and secondary curvatures of the vertebral column?

Accepted Answer

Primary curvatures are concave anteriorly, while secondary curvatures are convex anteriorly.

Question 2

A patient presents with an abnormal lateral curvature of the vertebral column. Which condition is most likely?

Accepted Answer

Scoliosis

Question 3

Which neuroglia cell is responsible for forming myelin in the central nervous system (CNS)?

Accepted Answer

Oligodendrocyte

Question 4

Which of the following best describes the function of the nodes of Ranvier?

Accepted Answer

They allow for saltatory conduction of action potentials along myelinated axons.

Question 5

During the absolute refractory period of an action potential, which statement is true regarding voltage-gated Na$$^+$$ channels?

Accepted Answer

They are inactivated and cannot be reopened until repolarization occurs.

Question 6

Which equation is used to calculate the membrane potential based on ionic concentrations and permeability?

Accepted Answer

The Goldman-Hodgkin-Katz equation: $$V_m = \frac{RT}{F} \ln \frac{P_{K^+}[K^+]_{	ext{out}} + P_{Na^+}[Na^+]_{	ext{out}} + P_{Cl^-}[Cl^-]_{	ext{in}}}{P_{K^+}[K^+]_{	ext{in}} + P_{Na^+}[Na^+]_{	ext{in}} + P_{Cl^-}[Cl^-]_{	ext{out}}}$$

Question 7

Which of the following best describes the difference between graded potentials and action potentials?

Accepted Answer

Graded potentials can summate, while action potentials cannot.

Question 8

A neuron receives simultaneous excitatory and inhibitory inputs. Which process determines whether an action potential will be generated?

Accepted Answer

Summation of postsynaptic potentials (both spatial and temporal)

Question 9

Which neurotransmitter is released at neuromuscular junctions and acts via ligand-gated ion channels?

Accepted Answer

Acetylcholine

Question 10

Which lobe of the brain contains the primary visual cortex?

Accepted Answer

Occipital lobe

Question 11

Which area of the cerebral cortex is responsible for integrating sensory information and forming a comprehensive perception of the environment?

Accepted Answer

Multimodal association area

Question 12

Which type of cerebral white matter fiber connects the two hemispheres of the brain?

Accepted Answer

Commissural fibers

Question 13

Which structure is part of the diencephalon and acts as a relay station for sensory information?

Accepted Answer

Thalamus

Question 14

Which of the following is NOT a function of the hypothalamus?

Accepted Answer

Initiation of voluntary motor movement

Question 15

A patient has damage to the precentral gyrus. Which function is most likely impaired?

Accepted Answer

Primary motor control

Question 16

Which of the following best describes the flow of sensory information in the brain?

Accepted Answer

Sensory receptors → primary sensory cortex → association area → multimodal association area

Question 17

Which structural classification of neurons is most commonly found in the CNS and is involved in integrating information?

Accepted Answer

Multipolar neurons

Question 18

Which homeostatic imbalance is characterized by the destruction of myelin in the CNS, leading to impaired conduction of action potentials?

Accepted Answer

Multiple sclerosis

Question 19

If a neuron is hyperpolarized, which of the following is true?

Accepted Answer

The membrane potential becomes more negative than the resting potential.

Question 20

Which of the following best explains why myelinated axons conduct action potentials faster than unmyelinated axons?

Accepted Answer

Myelinated axons allow action potentials to jump from node to node via saltatory conduction.

Study Guide: Skeletal and Nervous System (Chapters 7, 11, 12)

Study Guide - Practice Questions

Study Guide - Flashcards