Q: Which equation best represents the negative feedback loop involved in bone remodeling?

When blood calcium levels decrease: $$\text{PTH} \rightarrow \text{Osteoclast activity} \uparrow \rightarrow \text{Blood Ca}^{2+} \uparrow$$

Q: Which of the following equations correctly represents the resting membrane potential of a neuron?

$$V_{\text{rest}} = -70\ \text{mV}$$

Q: Which of the following equations best represents the sliding filament model of muscle contraction?

$$\text{ATP} + \text{Ca}^{2+} \rightarrow \text{Myosin binds to Actin} \rightarrow \text{Sarcomere shortens}$$

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 allow for efficient gas exchange.

Question 2

A patient presents with jaundice, a yellowing of the skin. Which of the following best explains the physiological basis for this change in skin color?

Accepted Answer

Accumulation of bilirubin resulting from liver dysfunction.

Question 3

Which equation best represents the negative feedback loop involved in bone remodeling?

Accepted Answer

When blood calcium levels decrease: $$	ext{PTH} ightarrow 	ext{Osteoclast activity} \uparrow ightarrow 	ext{Blood Ca}^{2+} \uparrow$$

Question 4

Which of the following is a correct sequence for the pathway of light through the eye?

Accepted Answer

Cornea $$\rightarrow$$ Lens $$\rightarrow$$ Retina

Question 5

A nerve impulse travels faster in myelinated axons than in non-myelinated axons. Which mechanism explains this phenomenon?

Accepted Answer

Saltatory conduction, where the action potential jumps between nodes of Ranvier.

Question 6

Which of the following best describes the function of the mitochondria in muscle cells during contraction?

Accepted Answer

Mitochondria produce ATP required for the detachment of myosin heads from actin during muscle contraction.

Question 7

Which of the following equations correctly represents the resting membrane potential of a neuron?

Accepted Answer

$$V_{	ext{rest}} = -70\ 	ext{mV}$$

Question 8

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

Accepted Answer

Substantia nigra of the midbrain

Question 9

Which of the following is NOT a function of bone?

Accepted Answer

Production of hormones

Question 10

Which of the following best describes the difference between sensation and perception?

Accepted Answer

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

Question 11

Which of the following equations best represents the sliding filament model of muscle contraction?

Accepted Answer

$$	ext{ATP} + 	ext{Ca}^{2+} ightarrow 	ext{Myosin binds to Actin} ightarrow 	ext{Sarcomere shortens}$$

Question 12

Which of the following is a correct description of the structural organization of the human body from simplest to most complex?

Accepted Answer

Chemical $$\rightarrow$$ Cellular $$\rightarrow$$ Tissue $$\rightarrow$$ Organ $$\rightarrow$$ Organ System $$\rightarrow$$ Organism

Question 13

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

It restricts the passage of harmful substances from the blood into the brain.

Question 14

Which of the following is a correct comparison between the somatic and autonomic nervous systems?

Accepted Answer

Somatic nervous system controls skeletal muscles, while autonomic nervous system controls smooth and cardiac muscles.

Question 15

Which of the following is a correct description of the pathway of sound conduction to the fluids of the internal ear?

Accepted Answer

Tympanic membrane $$\rightarrow$$ Ossicles $$\rightarrow$$ Oval window $$\rightarrow$$ Cochlea

Question 16

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature and interaction with the pituitary gland.

Question 17

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

Accepted Answer

ATP is required for the detachment of myosin from actin after the power stroke.

Question 18

Which of the following is a correct description of the function of bursae in synovial joints?

Accepted Answer

Bursae reduce friction between moving structures such as tendons and bones.

Question 19

Which of the following best describes the function of epithelial tissue?

Accepted Answer

Epithelial tissue forms protective barriers and is involved in absorption and secretion.

Anatomy and Physiology I: Comprehensive Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards