ATI TEAS 7
TEAS Practice Test Science
1. Which part of the brain is responsible for higher brain functions, such as thought and action?
- A. Amygdala
- B. Brain stem
- C. Cerebellum
- D. Cerebrum
Correct answer: D
Rationale: The cerebrum is the correct answer as it is responsible for higher brain functions like thought and action. The amygdala (Choice A) is involved in emotions and emotional responses, not higher brain functions. The brain stem (Choice B) controls basic life functions such as breathing and heart rate, not higher brain functions. The cerebellum (Choice C) is mainly responsible for motor control and coordination, not higher brain functions like thought and action.
2. What function do hydrophobic proteins often provide in the body?
- A. Digestive enzymes
- B. Provide structure
- C. Carry oxygen molecules
- D. Store energy
Correct answer: B
Rationale: Hydrophobic proteins are known for their ability to repel water and are often involved in providing structural support in cells and tissues. They help maintain the structural integrity and shape of cell membranes, organelles, and other cellular components. Choice A, digestive enzymes, typically consist of hydrophilic proteins that interact with water and substrates to facilitate digestion. Choice C, carrying oxygen molecules, is a function commonly associated with specific proteins like hemoglobin. Choice D, storing energy, is usually performed by proteins like enzymes involved in energy storage and release, such as glycogen phosphorylase.
3. What is the primary function of the liver in the digestive system?
- A. To absorb water
- B. To produce bile
- C. To store glucose
- D. To regulate metabolism
Correct answer: B
Rationale: The liver's main function in the digestive system is to produce bile. Bile helps in the digestion and absorption of fats by emulsifying them, breaking down large fat globules into smaller droplets that can be acted upon by digestive enzymes. Choices A, C, and D are incorrect because the liver's primary role in the digestive system is not to absorb water, store glucose, or regulate metabolism. While the liver does have roles in metabolism and glucose regulation, its key function in digestion is bile production.
4. Which of the following structures is located in the pelvic cavity?
- A. The kidneys
- B. The colon
- C. The bladder
- D. The rectum
Correct answer: C
Rationale: The correct answer is the bladder. The bladder is situated in the pelvic cavity, specifically in the lower part of the abdomen. The kidneys are positioned higher up in the abdominal cavity, not in the pelvic region. The colon and rectum are part of the large intestine and are primarily located in the abdominal cavity, not the pelvic cavity. Therefore, the bladder is the only structure listed that is anatomically situated in the pelvic cavity.
5. What might happen if blood sugar begins to drop in the human body?
- A. The pancreas releases insulin.
- B. The liver releases stored glucose.
- C. The liver stores glucose as glycogen.
- D. The pancreas releases glucagon.
Correct answer: D
Rationale: When blood sugar levels drop in the body, the pancreas releases glucagon. Glucagon acts to increase blood sugar levels by stimulating the liver to release stored glucose into the bloodstream. Therefore, the correct answer is D. Choice A is incorrect because the release of insulin lowers blood sugar levels, opposite of what happens when blood sugar is dropping. Choice B is incorrect as the liver releases stored glucose in response to low blood sugar, not when blood sugar is already dropping. Choice C is also incorrect as the liver stores glucose as glycogen but doesn't directly impact blood sugar levels dropping in the moment.
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