Question 1

Which of the following best illustrates the principle of complementarity of structure and function in human anatomy?

Accepted Answer

The thin walls of alveoli in the lungs facilitate rapid gas exchange.

Question 2

A patient presents with a burn that has destroyed both the epidermis and the entire dermis. Which of the following best describes the consequences for skin function?

Accepted Answer

Loss of sensation and inability to regenerate skin due to destruction of nerve endings and stem cells.

Question 3

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

Accepted Answer

They bind to troponin, causing a conformational change that exposes myosin-binding sites on actin.

Question 4

A person is unable to perceive pain in their left hand after a spinal cord injury. Which structure is most likely damaged?

Accepted Answer

The ascending sensory (afferent) tracts in the right lateral spinothalamic pathway.

Question 5

Which of the following is a correct sequence for the negative feedback loop regulating blood calcium levels?

Accepted Answer

Low blood calcium $$\rightarrow$$ Parathyroid hormone release $$\rightarrow$$ Increased osteoclast activity $$\rightarrow$$ Increased blood calcium

Question 6

Which of the following best explains why myelinated axons conduct action potentials faster than unmyelinated axons?

Accepted Answer

Saltatory conduction allows action potentials to jump between nodes of Ranvier.

Question 7

A patient with Parkinson’s disease is most likely to have degeneration of neurons in which brain region?

Accepted Answer

Substantia nigra of the midbrain

Question 8

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

Accepted Answer

The somatic system controls skeletal muscle via a single neuron pathway, while the autonomic system controls smooth and cardiac muscle via a two-neuron pathway.

Question 9

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature, hunger, and endocrine activity via the pituitary gland.

Question 10

A person with a mutation causing nonfunctional rod cells in the retina would most likely experience which of the following symptoms?

Accepted Answer

Difficulty seeing in low-light conditions (night blindness)

Question 11

Which of the following best describes the process of endochondral ossification during bone development?

Accepted Answer

Bone tissue replaces a hyaline cartilage model, beginning at the primary ossification center.

Question 12

Which of the following is a correct pairing of a glial cell and its function in the central nervous system (CNS)?

Accepted Answer

Astrocyte – maintains the blood-brain barrier and regulates the extracellular environment.

Question 13

A person is exposed to a toxin that blocks voltage-gated sodium channels in neurons. What is the most immediate effect on neuronal function?

Accepted Answer

Action potentials cannot be generated, leading to loss of neural signaling.

Question 14

Which of the following best describes the pathway of sound conduction to the fluids of the internal ear?

Accepted Answer

Tympanic membrane $$\rightarrow$$ ossicles $$\rightarrow$$ oval window $$\rightarrow$$ cochlear fluid

Question 15

Which of the following is a characteristic of synovial joints?

Accepted Answer

They contain a joint cavity filled with synovial fluid.

Question 16

Which of the following best explains why a person with jaundice has yellowish skin?

Accepted Answer

Accumulation of bilirubin in the skin due to liver dysfunction.

Question 17

Which of the following best describes the function of the plasma membrane in a typical human cell?

Accepted Answer

It regulates the movement of substances into and out of the cell, maintaining homeostasis.

Question 18

Which of the following is a correct description of the difference between sensation and perception?

Accepted Answer

Sensation is the detection of a stimulus by sensory receptors, while perception is the interpretation of that stimulus by the brain.

Question 19

Which of the following best describes the role of ATP in muscle contraction?

Accepted Answer

ATP binds to myosin, allowing it to detach from actin and reset for another power stroke.

Anatomy and Physiology I: Comprehensive Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards