Nursing Elites

1. Which of the following statements best describes endocrine glands?

• A. They secrete chemicals into the blood
• B. They secrete enzymes into ducts
• C. They produce sweat
• D. They produce saliva

Correct answer: A

Rationale: Endocrine glands are ductless glands that release hormones directly into the bloodstream. These hormones are then carried to target organs and tissues throughout the body, where they regulate various physiological functions. The statement 'They secrete chemicals into the blood' accurately describes the function of endocrine glands. Choices B, C, and D are incorrect because endocrine glands do not secrete enzymes into ducts, produce sweat, or produce saliva. These functions are typically associated with exocrine glands, sweat glands, and salivary glands, respectively.

2. Which organ in the digestive system absorbs nutrients?

• A. Stomach
• B. Small intestine
• C. Large intestine
• D. Esophagus

Correct answer: B

Rationale: The small intestine is the primary site for nutrient absorption in the digestive system. It plays a crucial role in absorbing digested food into the bloodstream, where the nutrients are then circulated to the body's cells for energy and other functions. The stomach primarily breaks down food through the action of acids and enzymes, while the large intestine absorbs water and salts, not nutrients. The esophagus is a muscular tube that connects the mouth to the stomach and does not participate in nutrient absorption.

3. A tissue examined under the microscope exhibits the following characteristics: cells found on the internal surface of the stomach, no extracellular matrix, cells tall and thin, and no blood vessels in the tissue. What type of tissue is this?

• A. Epithelial
• B. Connective
• C. Muscle
• D. Cartilage

Correct answer: A

Rationale: The correct answer is 'Epithelial.' Epithelial tissue is characterized by cells that cover internal and external surfaces, such as the lining of the stomach. It lacks an extracellular matrix, has tall and thin cells, and does not contain blood vessels. The other choices are incorrect because connective tissue typically has an extracellular matrix, muscle tissue is composed of contractile cells, and cartilage is a type of connective tissue with a specific extracellular matrix and cell arrangement.

4. What is the function of the coronary artery?

• A. It carries oxygenated blood to the heart muscle.
• B. It carries deoxygenated blood to the lungs.
• C. It distributes blood to the body.
• D. It supplies blood to the heart muscle.

Correct answer: D

Rationale: The correct answer is D: 'It supplies blood to the heart muscle.' The coronary artery's main function is to supply oxygenated blood to the heart muscle, ensuring that the heart receives the necessary nutrients and oxygen it needs to function properly. Choices A, B, and C are incorrect because the coronary artery specifically delivers oxygenated blood to the heart muscle, not deoxygenated blood to the lungs or blood to the rest of the body.

5. What is the role of the large intestine in the digestive system?

• A. Absorbing nutrients
• B. Absorbing water and forming solid waste
• C. Breaking down fats
• D. Secreting digestive enzymes

Correct answer: B

Rationale: The correct answer is B: Absorbing water and forming solid waste. The large intestine plays a crucial role in absorbing water from the remaining indigestible food matter and forming solid waste (feces) to be excreted from the body. This process helps in maintaining the body's fluid balance and eliminating waste efficiently. Choices A, C, and D are incorrect because the large intestine is not primarily responsible for absorbing nutrients, breaking down fats, or secreting digestive enzymes. These functions are mainly carried out in the small intestine.

Similar Questions