Question 1

Which of the following best describes the relationship between anatomy and physiology?

Accepted Answer

Anatomy studies the structure of body parts, and physiology studies how those parts work together to carry out life-sustaining functions.

Question 2

A patient is admitted with a dangerously low blood pH of 7.0. Which of the following best explains how the body would attempt to restore homeostasis?

Accepted Answer

By using buffers to bind excess $$\mathrm{H^+}$$ ions, raising the pH through a negative feedback mechanism.

Question 3

Which of the following correctly matches a type of chemical bond with its description?

Accepted Answer

Hydrogen bond: a weak attraction between a hydrogen atom and an electronegative atom, such as oxygen or nitrogen.

Question 4

A cell is placed in a hypertonic solution. What will happen to the cell, and why?

Accepted Answer

The cell will shrink because water moves out of the cell.

Question 5

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a hyaline cartilage model, forming most bones below the base of the skull.

Question 6

Which of the following is a correct sequence of the structural organization in muscle tissue from superficial to deep?

Accepted Answer

Muscle, fascicle, muscle fiber, myofibril

Question 7

A patient suffers a spinal cord injury that damages the myelin sheath of neurons. Which of the following is a likely consequence?

Accepted Answer

Decreased speed of nerve impulse conduction due to impaired insulation.

Question 8

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

Accepted Answer

Calcium binds to troponin, causing tropomyosin to move and expose binding sites on actin.

Question 9

Which of the following is a function of the prefrontal cortex?

Accepted Answer

Involved in reasoning, judgment, and personality

Question 10

A person is unable to understand spoken language but can speak fluently, although their speech lacks meaning. Which brain area is most likely damaged?

Accepted Answer

Wernicke's area

Question 11

Which of the following best describes the difference between the somatic and autonomic nervous systems?

Accepted Answer

The somatic nervous system controls voluntary skeletal muscles, while the autonomic nervous system controls involuntary smooth and cardiac muscles and glands.

Question 12

Which of the following is a correct pairing of a connective tissue fiber and its function?

Accepted Answer

Reticular fibers: form supportive networks in soft tissues like lymph nodes

Question 13

Which of the following best describes the function of buffers in biological systems?

Accepted Answer

Buffers maintain pH by releasing or binding $$\mathrm{H^+}$$ ions as needed.

Question 14

Which of the following is true regarding the classification of epithelial tissues?

Accepted Answer

They are classified based on the shape of cells and the number of cell layers.

Question 15

A person with a burn that destroys both the epidermis and the entire dermis would be classified as having which type of burn?

Accepted Answer

Third-degree burn

Question 16

Which of the following best describes the function of the sarcoplasmic reticulum in muscle cells?

Accepted Answer

It stores and releases calcium ions ($$\mathrm{Ca$$^{2+}$$}) $$necessary for muscle contraction.

Question 17

Which of the following is a correct description of the function of DNA?

Accepted Answer

DNA stores genetic information and directs the synthesis of proteins.

Question 18

Which of the following is a distinguishing structural feature of synovial joints?

Accepted Answer

Presence of a joint cavity filled with synovial fluid

Question 19

Which of the following best describes the role of enzymes in biological reactions?

Accepted Answer

Enzymes act as biological catalysts, speeding up reactions by lowering activation energy.

Question 20

A patient is unable to flex their elbow after a traumatic injury. Which type of synovial joint is most likely damaged?

Accepted Answer

Hinge joint

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