Question 1

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

Accepted Answer

Primary curvatures (thoracic and sacral) are present at birth, while secondary curvatures (cervical and lumbar) develop after birth as a child grows.

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, increasing conduction velocity.

Question 5

During the depolarization phase of an action potential, which channels are primarily open?

Accepted Answer

Voltage-gated Na$$^+$$ channels

Question 6

Which equation would you use to calculate the resting membrane potential, considering the permeability and concentration gradients of multiple ions?

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 explains why action potentials are 'all-or-none' events, while graded potentials are not?

Accepted Answer

Action potentials are triggered only when threshold is reached, leading to a full response, whereas graded potentials vary in amplitude based on stimulus strength.

Question 8

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

Accepted Answer

Both spatial and temporal summation of postsynaptic potentials

Question 9

Which of the following is TRUE regarding the absolute refractory period?

Accepted Answer

It prevents the initiation of another action potential, regardless of stimulus strength.

Question 10

Which neurotransmitter is released at neuromuscular junctions and acts via ligand-gated ion channels to produce excitatory postsynaptic potentials?

Accepted Answer

Acetylcholine

Question 11

Which lobe of the brain contains the primary visual cortex?

Accepted Answer

Occipital lobe

Question 12

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

Accepted Answer

Multimodal association areas

Question 13

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

Accepted Answer

Commissural fibers

Question 14

A patient has damage to the thalamus. Which function is most likely to be impaired?

Accepted Answer

Relay and processing of sensory information to the cerebral cortex

Question 15

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

Accepted Answer

Relay of sensory information to the cortex

Question 16

Which structural classification of neurons is most commonly found in sensory neurons of the PNS?

Accepted Answer

Unipolar

Question 17

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

Accepted Answer

Motor information begins in the primary motor cortex, passes through association areas, and is relayed to the spinal cord via projection fibers.

Question 18

Which of the following is a real-life example of a homeostatic imbalance involving the nervous system, as described in the study materials?

Accepted Answer

Multiple sclerosis, which involves demyelination of axons in the CNS, leading to impaired conduction of action potentials.

Question 19

A patient is unable to initiate voluntary movements and has difficulty with motor planning. Which brain region is most likely affected?

Accepted Answer

Basal nuclei

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

Study Guide - Practice Questions

Study Guide - Flashcards