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WGU D574 NEUROPSYCHOLOGY – OBJECTIVE
MIDTERM ACTUAL ASSESSMENT (OA) –
WESTERN GOVERNORS UNIVERSITY – 2026 –
COMPLETE QUIZ WITH CORRECT ANSWERS
Instructions: Select the best answer(s) for each question. Questions marked (SATA) require selecting all correct options. Content aligns with the WGU D574 Objective Assessment. SECTION 1: BRAIN ANATOMY & FUNCTION (Questions 1-20)
- The _______ lobe is the most anterior portion of the cerebral cortex. A. Parietal B. Temporal C. Frontal
D. Occipital Answer: C. Frontal Rationale: The frontal lobe is the most anterior (front) portion of the cerebral cortex, responsible for executive functions, planning, and motor control.
- The two cerebral hemispheres are connected by: A. The basal ganglia B. The corpus callosum C. The cerebellum D. The thalamus Answer: B. The corpus callosum Rationale: The corpus callosum is a thick bundle of nerve fibers that connects the left and right cerebral hemispheres, allowing communication between them.
C. Choroid plexus D. Blood-brain barrier Answer: A. Meninges Rationale: The meninges (dura mater, arachnoid mater, and pia mater) are three protective layers that envelop the brain and spinal cord.
- The _______ is the outermost layer of the cerebral hemispheres. A. White matter B. Basal ganglia C. Cerebral cortex D. Limbic system Answer: C. Cerebral cortex Rationale: The cerebral cortex is the outer layer of gray matter covering the cerebral hemispheres, responsible for higher cognitive functions.
- Which statement about white and gray matter is true? A. Gray matter is like insulation B. White matter is like insulation C. Both are identical in composition D. Neither contains neurons Answer: B. White matter is like insulation Rationale: White matter consists of myelinated axons, which act as insulation to speed up neural transmission. Gray matter contains cell bodies and unmyelinated fibers.
- The basal ganglia are particularly implicated in: A. Language comprehension B. Movement C. Visual processing D. Emotional regulation
- In terms of anatomical position, the top of a dog's head is: A. Ventral B. Dorsal C. Rostral D. Caudal Answer: B. Dorsal Rationale: Dorsal refers to the back or top surface. In four-legged animals, the top of the head is the dorsal surface.
- The _______ Is the outermost layer of the cerebral hemispheres. A. Dura mater B. Pia mater C. Cerebral cortex D. Arachnoid mater
Answer: C. Cerebral cortex Rationale: The cerebral cortex is the outer layer of the cerebrum, composed of folded gray matter.
- (SATA) Which of the following are components of the central nervous system (CNS)? A. Brain B. Spinal cord C. Peripheral nerves D. Cranial nerves E. Autonomic ganglia Answer: A, B Rationale: The CNS consists of the brain and spinal cord, encased within the skull and spinal column. Peripheral nerves and ganglia are part of the PNS.
B. Parietal lobe C. Temporal lobe D. Occipital lobe Answer: D. Occipital lobe Rationale: The occipital lobe, located at the back of the brain, contains the primary visual cortex and processes visual information.
- Which lobe is primarily responsible for processing auditory information and language comprehension? A. Frontal lobe B. Parietal lobe C. Temporal lobe D. Occipital lobe Answer: C. Temporal lobe
Rationale: The temporal lobe contains the primary auditory cortex and Wernicke's area, which is crucial for language comprehension.
- Which lobe is primarily responsible for processing somatosensory information (touch, temperature, pain)? A. Frontal lobe B. Parietal lobe C. Temporal lobe D. Occipital lobe Answer: B. Parietal lobe Rationale: The parietal lobe contains the primary somatosensory cortex, which processes tactile and proprioceptive information.
- The cerebellum is primarily responsible for: A. Higher cognitive functions B. Balance and coordination
- Broca's area, responsible for speech production, is located in the: A. Temporal lobe B. Parietal lobe C. Frontal lobe D. Occipital lobe Answer: C. Frontal lobe Rationale: Broca's area is located in the posterior part of the frontal lobe, typically in the left hemisphere, and is essential for speech production.
- Wernicke's area, responsible for language comprehension, is located in the: A. Temporal lobe B. Parietal lobe C. Frontal lobe D. Occipital lobe
Answer: A. Temporal lobe Rationale: Wernicke's area is located in the posterior part of the superior temporal gyrus and is crucial for understanding spoken and written language.
- The limbic system is primarily involved in: A. Motor coordination B. Emotion and memory C. Visual processing D. Respiratory control Answer: B. Emotion and memory Rationale: The limbic system (including the amygdala, hippocampus, and cingulate gyrus) regulates emotions, motivation, and memory formation.
A. Dendrite B. Cell body C. Axon Hillock D. Axon Terminal Answer: C. Axon Hillock Rationale: The axon hillock has the highest concentration of voltagegated sodium channels and the lowest threshold, making it the site where action potentials are typically initiated.
- Axon terminals: A. Receive signals from other neurons B. Synapse onto other cells C. Produce neurotransmitters in the nucleus D. Generate action potentials
Answer: B. Synapse onto other cells Rationale: Axon terminals form synapses with other neurons, muscles, or glands, releasing neurotransmitters to communicate.
- The ability of the brain in development and in adulthood to be changed by environmental inputs is called: A. Neurogenesis B. Neuroplasticity C. Synaptic pruning D. Myelination Answer: B. Neuroplasticity Rationale: Neuroplasticity refers to the brain's ability to reorganize and adapt structurally and functionally in response to experience, learning, and injury.
Answer: B. Less likely to fire an action potential Rationale: Hyperpolarization increases the membrane potential (more negative), moving it further from threshold and making it harder to generate an action potential.
- A neuron can be pushed to threshold if many EPSPs arrive at the axon hillock in quick succession. This process is referred to as: A. Spatial summation B. Temporal summation C. Facilitation D. Inhibition Answer: B. Temporal summation Rationale: Temporal summation occurs when multiple EPSPs arrive in rapid succession from the same synapse, accumulating to reach threshold.
- Electrically charged molecules are called: A. Electrolytes B. Ions C. Isotopes D. Free radicals Answer: B. Ions Rationale: Ions are atoms or molecules that have gained or lost electrons, resulting in a net electrical charge (e.g., Na⁺, K⁺, Cl⁻, Ca²⁺) .
- _______ ions are negatively charged; _______ ions are positively charged. A. Cations; Anions B. Anions; Cations C. Protons; Electrons
