Nursing Elites

1. The pancreas releases a number of digestive enzymes into the small intestine. Which of the following enzymes is NOT produced by the pancreas?

• A. Trypsin (protein digestion)
• B. Amylase (carbohydrate digestion)
• C. Lipase (fat digestion)
• D. Lactase (sugar digestion)

Correct answer: D

Rationale: Lactase is an enzyme responsible for breaking down lactose, a sugar found in dairy products, and it is produced by the small intestine, not the pancreas. The pancreas produces enzymes like trypsin for protein digestion, amylase for carbohydrate digestion, and lipase for fat digestion. Therefore, the correct answer is D. Choices A, B, and C are incorrect because trypsin, amylase, and lipase are indeed enzymes produced by the pancreas for the digestion of proteins, carbohydrates, and fats, respectively.

2. Which type of energy is associated with the random motion of particles in a substance?

• A. Potential energy
• B. Mechanical energy
• C. Thermal energy
• D. Chemical energy

Correct answer: C

Rationale: Thermal energy is the correct answer as it is associated with the random motion of particles in a substance. When particles move randomly, they generate heat energy, which is a form of thermal energy. Potential energy is stored energy that can be converted into other forms when released, such as kinetic energy. Mechanical energy is the sum of potential and kinetic energy in an object, which is not directly related to the random motion of particles. Chemical energy is energy stored in the bonds of chemical compounds and is not specifically related to the motion of particles.

3. What type of bone is the kneecap (patella)?

• A. Long bone
• B. Short bone
• C. Flat bone
• D. Irregular bone

Correct answer: C

Rationale: The correct answer is C: Flat bone. The kneecap (patella) is classified as a flat bone. Flat bones are thin, flattened bones that provide protection and offer a broad surface for muscle attachment. The patella fits this description as it is a flat, triangular bone located in front of the knee joint, protecting the knee and providing attachment points for muscles like the quadriceps. Choice A, long bone, is incorrect as long bones are typically found in the arms and legs, not in the knee area. Choice B, short bone, is incorrect as short bones are cube-shaped and are not characteristic of the patella. Choice D, irregular bone, is incorrect as irregular bones have complex shapes and do not apply to the flat, triangular structure of the patella.

4. What property of matter explains why ice floats on water?

• A. Viscosity
• B. Density
• C. Buoyancy
• D. Surface tension

Correct answer: C

Rationale: The correct answer is C, buoyancy. Ice floats on water due to buoyancy, a property of matter. When water freezes into ice, it becomes less dense than liquid water, causing it to float. This phenomenon occurs because the molecules in ice are more spread out compared to liquid water, resulting in ice being less dense and able to float on the surface. Choice A, viscosity, is incorrect because viscosity refers to a fluid's resistance to flow, not its ability to float. Choice B, density, is incorrect because while ice being less dense than water is the reason it floats, this choice does not explain the specific property that causes this phenomenon. Choice D, surface tension, is incorrect as it pertains to the cohesive forces between molecules at the surface of a liquid, not the reason why ice floats on water.

5. What is the scientific name for the tear gland?

• A. Lachrymal gland
• B. Lacrimal sac
• C. Lacrimal duct
• D. Lacrimal papilla

Correct answer: A

Rationale: The correct answer is A: Lachrymal gland. The lachrymal gland, also known as the tear gland, is the almond-shaped gland located above each eye, responsible for producing tears. Tears are a complex mixture of water, electrolytes, proteins, and other substances that help lubricate and protect the eyes from dryness and irritation. Choice B, Lacrimal sac, is incorrect as it refers to a structure that collects tears from the eye. Choice C, Lacrimal duct, is incorrect as it is the tube that carries tears from the lacrimal sac to the nasal cavity. Choice D, Lacrimal papilla, is incorrect as it is a small elevation at the inner corner of the eye where tears drain into the puncta.

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