Anatomy & Physiology Exam Review: Nervous System and Exam Question Formats

Exam Question Formats and Strategies

Overview of Exam Formats

This section provides examples of the types of exam questions that may appear in Anatomy & Physiology assessments. Understanding these formats will help students prepare effectively for multiple-choice, true/false, ordering, matching, and applied questions.

• Standard Multiple Choice: Select the single best answer from several options.

• True/False: Determine whether a statement is correct.

• Multiple, Multiple Choice: More than one answer may be correct; select all that apply.

• Order: Arrange events or steps in the correct sequence.

• Matching: Pair items from two columns based on their relationships.

• Applied Questions: Use anatomical terminology to describe locations or injuries.

Sample Question Types

• Multiple Choice Example: In glycolysis, glucose-1-phosphate is converted to which compound? (Options include glucose-6-phosphate, fructose-6-phosphate, etc.)

• True/False Example: If a cell with 2N chromosomes undergoes mitosis, the daughter cells will contain 2N chromosomes. (True/False)

• Order Example: Place the following events of cell division in the correct order: anaphase, cytokinesis, prophase, telophase, metaphase.

• Matching Example: Match hormones (e.g., melatonin, LH, cortisol, testosterone, epinephrine) with their functions.

• Applied Example: Identify the anatomical location of an injury using correct terminology (e.g., distal phalange, right hand).

Nervous System

Introduction to the Nervous System

The nervous system is a complex network responsible for coordinating body activities, processing sensory information, and facilitating communication between different body regions. It is divided into the central nervous system (CNS) and peripheral nervous system (PNS).

Key Topics and Concepts

• Protection of the CNS: The CNS is protected by the skull, vertebral column, meninges, and cerebrospinal fluid (CSF).

• Sympathetic vs. Parasympathetic: The autonomic nervous system (ANS) is divided into sympathetic ("fight or flight") and parasympathetic ("rest and digest") branches.

• Anatomy of the ANS: Includes sympathetic and parasympathetic pathways, ganglia, and neurotransmitters.

• Spinal Nerves and Plexuses: Spinal nerves emerge from the spinal cord and form plexuses (cervical, brachial, lumbar, sacral) that innervate specific body regions.

• Neurotransmitters: Chemical messengers such as acetylcholine, norepinephrine, and serotonin transmit signals across synapses.

• Brain Structures: Includes the cerebrum, cerebellum, diencephalon (thalamus, hypothalamus), brainstem (midbrain, pons, medulla oblongata), and associated structures (fornix, ventricles, pineal gland, mammillary bodies).

• Lobes of the Cerebrum: Frontal, parietal, temporal, and occipital lobes, each with specialized functions.

• Functional Areas: Primary motor cortex, sensory areas, association areas, Broca's and Wernicke's areas.

• Tracts of the Brain and Spinal Cord: Pyramidal (corticospinal) and extrapyramidal tracts control voluntary and involuntary movements.

• Cerebrospinal Fluid (CSF): Produced by the choroid plexus, CSF cushions the brain and spinal cord and removes waste.

• Synaptic Transmission: Involves the release of neurotransmitters, synaptic potentials, and mechanisms such as the sodium-potassium pump.

• Action Potentials: Electrical impulses generated by neurons; involve depolarization and repolarization phases.

• Reflexes: Involuntary responses to stimuli; classified as somatic or autonomic, and as monosynaptic or polysynaptic.

• Special Senses: Vision, hearing, taste, smell, and equilibrium.

• Eye Anatomy and Physiology: Includes layers of the eye, accommodation, adaptation, and common disorders (myopia, hyperopia, emmetropia).

• Neurological Disorders: Parkinson's disease (dopamine deficiency), myasthenia gravis (autoimmune attack on acetylcholine receptors).

Definitions and Key Terms

• Neuron: The basic functional unit of the nervous system, specialized for transmitting electrical impulses.

• Synapse: The junction between two neurons where neurotransmitters are released.

• Ganglion: A cluster of neuron cell bodies in the peripheral nervous system.

• Reflex Arc: The neural pathway involved in a reflex action, typically including a sensory neuron, interneuron, and motor neuron.

• Action Potential: A rapid change in membrane potential that travels along the axon of a neuron.

• Neurotransmitter: A chemical substance released at the end of a nerve fiber that transmits signals across a synapse.

Sample Table: Comparison of Sympathetic and Parasympathetic Divisions

Feature	Sympathetic	Parasympathetic
Origin	Thoracolumbar (T1-L2)	Craniosacral (brainstem and S2-S4)
Main Function	"Fight or flight" response	"Rest and digest" response
Neurotransmitter	Norepinephrine (mainly)	Acetylcholine
Effect on Heart Rate	Increases	Decreases
Pupil Response	Dilates pupils	Constricts pupils

Important Equations and Principles

• Nernst Equation (for equilibrium potential):

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

• Ohm's Law (for membrane potential):

$V = IR$

Examples and Applications

• Example: During a reflex test, tapping the patellar tendon causes the quadriceps muscle to contract, resulting in the knee-jerk reflex.

• Application: Understanding the pathways of cranial nerves is essential for diagnosing neurological disorders.

Additional info:

• Some content was inferred and expanded for academic completeness, such as definitions, examples, and the comparison table.

• Specific details about the structure and function of the nervous system were logically grouped and elaborated based on standard Anatomy & Physiology curricula.