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Quiz: Introduction to Dementia and Cognitive Health

Test your understanding of dementia basics, cognitive functions, and brain health with these 10 review questions. Click "Show Answer" to check your work.

1. Which statement best describes dementia?

  1. A specific disease that causes memory loss in older adults
  2. An umbrella term for a decline in mental abilities severe enough to interfere with daily life
  3. A normal part of the aging process that everyone experiences
  4. A temporary condition caused by stress and poor sleep
Show Answer

The correct answer is B. Dementia is not a single disease but a syndrome (a group of symptoms) describing progressive decline in cognitive abilities that interferes with daily functioning. Alzheimer's disease is the most common cause, but there are many others. Dementia is not a normal part of aging, and it is progressive rather than temporary.

Concept Tested: Dementia

2. Approximately how many neurons does the adult human brain contain?

  1. 86 million
  2. 860 million
  3. 8.6 billion
  4. 86 billion
Show Answer

The correct answer is D. The adult human brain contains approximately 86 billion neurons (nerve cells). These cells communicate through electrical and chemical signals to form the neural networks that produce all thought, memory, and behavior. Knowing this number helps illustrate the brain's extraordinary complexity.

Concept Tested: Brain

3. Which of the following is a sign of normal aging rather than dementia?

  1. Occasionally forgetting a name but remembering it later
  2. Putting car keys in the freezer and not being able to retrace steps
  3. Getting lost while driving in a familiar neighborhood
  4. Struggling to follow or join a conversation
Show Answer

The correct answer is A. Occasionally forgetting names or appointments is typical of normal aging because these minor slips do not interfere with daily life. Putting items in unusual places without being able to retrace steps, getting lost in familiar places, and difficulty following conversations are warning signs of dementia rather than normal aging.

Concept Tested: Normal Aging

4. What is cognition?

  1. The ability to feel emotions such as joy and sadness
  2. The physical movements controlled by the brain
  3. All the mental processes involved in gaining knowledge and understanding
  4. The automatic functions of the brain such as heartbeat and breathing
Show Answer

The correct answer is C. Cognition refers to all the mental processes involved in gaining knowledge and understanding, including memory, attention, language, perception, executive function, learning, and information processing. While emotion and automatic functions are brain activities, they are distinct from cognition.

Concept Tested: Cognition

5. A caregiver notices that her father can still recall details from his wedding 50 years ago, but cannot remember what he ate for breakfast this morning. Which type of memory is most likely affected first?

  1. Long-term memory from childhood
  2. Procedural memory for skills like walking
  3. Short-term and recent episodic memory
  4. Semantic memory for general facts
Show Answer

The correct answer is C. Early dementia often affects short-term and recent episodic memory first because the hippocampus, which converts new experiences into lasting memories, is damaged early. Long-term memories already stored in the cortex, like wedding details, often remain accessible longer. Procedural and semantic memory are typically preserved until later stages.

Concept Tested: Memory

6. Which cognitive ability is best described as "the brain's manager" that coordinates planning, organizing, and decision-making?

  1. Perception
  2. Executive function
  3. Attention
  4. Information processing
Show Answer

The correct answer is B. Executive function is often called the brain's management system because it coordinates higher-level processes like planning, organizing, time management, flexible thinking, and impulse control. Perception interprets sensory input, attention focuses awareness, and information processing refers to the speed of thought, but none of these coordinate other cognitive abilities the way executive function does.

Concept Tested: Executive Function

7. Why might two people with similar brain damage show very different levels of dementia symptoms?

  1. One is older than the other
  2. One has higher cognitive reserve built through education and mental activity
  3. One has a larger brain overall
  4. One lives in a different climate
Show Answer

The correct answer is B. Cognitive reserve is the brain's resilience built through education, mentally stimulating activities, rich social networks, and healthy lifestyle. People with higher reserve can compensate for brain damage using alternative neural pathways, delaying the onset of symptoms even when underlying pathology is similar.

Concept Tested: Cognitive Reserve

8. Which type of attention is a person using when they focus on a conversation with one friend in a noisy restaurant while ignoring other voices?

  1. Sustained attention
  2. Alternating attention
  3. Selective attention
  4. Divided attention
Show Answer

The correct answer is C. Selective attention is the ability to focus on one thing while filtering out distractions, exactly what happens when holding a conversation in a noisy environment. Sustained attention means maintaining focus over time, divided attention means handling two tasks at once, and alternating attention means switching between tasks.

Concept Tested: Attention

9. Which lifestyle factor is NOT considered a key contributor to brain and cognitive health?

  1. Regular physical exercise
  2. Mental stimulation through learning
  3. Avoiding all social contact to reduce stress
  4. Quality sleep
Show Answer

The correct answer is C. Social engagement is actually one of the most important factors supporting emotional and cognitive health. Isolation is a known risk factor for cognitive decline. Physical activity, mental stimulation, quality sleep, healthy diet, and stress management all contribute to brain health, but avoiding social contact would harm rather than help.

Concept Tested: Brain Health

10. A caregiver asks why her mother with dementia can still tie her shoes but cannot remember a short list of groceries. What is the best explanation?

  1. Her mother is intentionally ignoring the grocery list
  2. Procedural memory for well-practiced skills is often preserved longer than short-term memory for new information
  3. Tying shoes does not require the brain
  4. Her mother is in the late stages of dementia
Show Answer

The correct answer is B. Procedural memory for well-learned skills like tying shoes, riding a bike, or brushing teeth is stored in different brain regions than short-term memory and is often preserved well into dementia. New information like a grocery list requires the hippocampus to encode, which is damaged early in many dementias. This explains the common pattern caregivers observe.

Concept Tested: Memory

Reflection Questions

These open-ended questions are for personal reflection and discussion — there are no single correct answers. Use them to check your overall grasp of the chapter before moving on to Chapter 2.

  1. What is the key difference between normal aging and dementia?
  2. Can you name at least five different cognitive abilities?
  3. Why might two people with similar brain changes show different levels of cognitive symptoms?
  4. How does attention relate to memory formation?
  5. What activities in your own life might be building cognitive reserve?

If you can answer these questions, you've grasped the foundational concepts and are ready to learn about brain anatomy in Chapter 2.