HESI A2
HESI A2 Anatomy and Physiology Practice Exam
1. Which of these can provide significant protein to a person on a vegan diet?
- A. Eggs
- B. Fish
- C. Tofu
- D. Leafy greens
Correct answer: C
Rationale: Tofu is a plant-based source of protein that can provide a significant amount of protein to a person on a vegan diet. It is made from soybeans and is a versatile ingredient that can be used in various dishes to increase protein intake. Tofu is a good option for vegans looking to meet their protein needs. Eggs and fish are not suitable for a vegan diet as they are animal products. While leafy greens do contain some protein, they are not considered a significant protein source compared to tofu.
2. Which brain region is involved in memory formation?
- A. Cerebellum
- B. Hippocampus
- C. Brainstem
- D. Frontal lobe
Correct answer: B
Rationale: The hippocampus, located in the temporal lobe, is crucial for memory formation. It plays a vital role in converting short-term memories into long-term memories. Damage to the hippocampus can lead to significant memory deficits, highlighting its importance in the memory process. The cerebellum (Choice A) is primarily involved in coordination and balance, not memory. The brainstem (Choice C) is responsible for basic life functions such as breathing and heart rate, not memory. The frontal lobe (Choice D) is associated with functions like decision-making, problem-solving, and emotions, but not primarily memory formation.
3. Where does primary peristalsis occur?
- A. Esophagus
- B. Stomach
- C. Nervous system
- D. Small intestine
Correct answer: A
Rationale: Primary peristalsis occurs in the esophagus. Peristalsis is the coordinated muscular contractions that propel food through the digestive tract. In the esophagus, primary peristalsis is the involuntary wave-like contractions that push food from the mouth to the stomach. It is the natural and automatic process that occurs to facilitate the movement of food during digestion. The stomach (choice B), nervous system (choice C), and small intestine (choice D) are not the primary sites where peristalsis occurs in the digestive system.
4. Which part of the brain is involved in processing visual information?
- A. Frontal lobe
- B. Parietal lobe
- C. Occipital lobe
- D. Temporal lobe
Correct answer: C
Rationale: The occipital lobe, located at the back of the brain, is primarily responsible for processing visual information received from the eyes. It plays a crucial role in interpreting and making sense of the visual stimuli perceived by the eyes, such as shapes, colors, and movement. This region is essential for visual perception and is specialized for processing and analyzing visual input, making it the correct answer. The frontal lobe is primarily involved in higher cognitive functions like decision-making and problem-solving, not visual processing. The parietal lobe is more related to sensory processes and spatial awareness, while the temporal lobe is primarily involved in processing auditory information and memory, not visual processing.
5. Which of the following is not part of the body’s secondary defense system?
- A. Macrophages
- B. Leukocytes
- C. T cells
- D. Cilia
Correct answer: D
Rationale: Cilia are not part of the body's secondary defense system. They are hair-like structures primarily involved in movement and transporting substances across cell surfaces, such as in the respiratory tract for debris and pathogen removal. However, cilia do not play a direct role in the immune response mechanisms characteristic of the body's secondary defense system. Macrophages, leukocytes, and T cells are immune cells that actively participate in the secondary defense system by targeting and eliminating pathogens.
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