Question 1

Which of the following best describes the role of mitochondria in cellular metabolism?

Accepted Answer

They generate ATP through oxidative phosphorylation, providing energy for cellular processes.

Question 2

A patient presents with a genetic mutation affecting collagen synthesis. Which tissue type is most likely to be compromised?

Accepted Answer

Connective tissue

Question 3

Which of the following is a function of the sodium-potassium pump ($$\mathrm{Na^+/K^+}$$ ATPase) in the plasma membrane?

Accepted Answer

Maintains the resting membrane potential by actively transporting $$\mathrm{Na^+}$$ out and $$\mathrm{K^+}$$ into the cell

Question 4

Which organelle is primarily responsible for the synthesis of membrane-bound and secreted proteins?

Accepted Answer

Rough endoplasmic reticulum

Question 5

A burn patient loses the protective function of the epidermis. Which accessory structure is most likely to be affected, increasing the risk of infection?

Accepted Answer

Sebaceous glands

Question 6

Which of the following best explains why simple diffusion is insufficient for oxygen delivery in large multicellular organisms?

Accepted Answer

The surface area to volume ratio decreases as size increases, limiting diffusion efficiency.

Question 7

Which of the following cell junctions is most important for preventing leakage between epithelial cells in the intestines?

Accepted Answer

Tight junctions

Question 8

A patient with hyperkalemia (elevated $$\mathrm{K^+}$$ levels) is at risk for which physiological disturbance?

Accepted Answer

Increased risk of cardiac arrhythmias due to altered membrane potentials

Question 9

Which of the following best describes the function of GAGs (glycosaminoglycans) in connective tissue?

Accepted Answer

They attract water, contributing to the gel-like consistency of the extracellular matrix.

Question 10

A mutation in the gene encoding for the protein claudin would most directly affect which cellular structure?

Accepted Answer

Tight junctions

Question 11

Which of the following best describes the process of endocytosis?

Accepted Answer

Engulfment of extracellular material by the plasma membrane to form a vesicle

Question 12

Which of the following is a major function of the skin's keratinocytes?

Accepted Answer

Formation of a waterproof barrier to prevent dehydration

Question 13

A patient with a deficiency in vitamin D is most likely to experience which of the following symptoms?

Accepted Answer

Decreased bone mineralization leading to osteomalacia

Question 14

Which of the following best explains the difference between simple and facilitated diffusion?

Accepted Answer

Facilitated diffusion involves carrier proteins, while simple diffusion does not.

Question 15

A patient with cystic fibrosis has a mutation in the CFTR protein, affecting chloride ion transport. Which process is most directly impaired?

Accepted Answer

Facilitated diffusion of chloride ions across epithelial membranes

Question 16

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Modifies, sorts, and packages proteins for secretion or delivery to other organelles

Question 17

A patient with a mutation in the gene encoding for elastin is most likely to have defects in which tissue property?

Accepted Answer

Elasticity

Question 18

Which of the following best describes the role of calcium ions ($$\mathrm{Ca$$^{2+}$$}) in $$muscle contraction?

Accepted Answer

They bind to troponin, allowing actin-myosin interaction.

Question 19

Which of the following is a characteristic of epithelial tissue?

Accepted Answer

Has cells tightly packed with minimal extracellular space

Question 20

A patient with a genetic defect in the protein keratin would most likely present with which clinical symptom?

Accepted Answer

Fragile skin prone to blistering

Anatomy & Physiology: Core Concepts and Structures Study Notes

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