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Physics of the Human Body and Health

Physics

Exploring the fundamental physics principles governing biological processes and human health.

biophysics human body health physics principles

8 Questions Hard Ages 18+ Apr 6, 2026

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About this Study Set

This study set covers Physics through 8 practice questions. Exploring the fundamental physics principles governing biological processes and human health. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 8 questions from the Physics of the Human Body and Health study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the approximate speed of an electrical signal (nerve impulse) along a myelinated axon in the human nervous system?

A 1-5 meters per second
B 10-50 meters per second
C 50-120 meters per second
D 0.1-1 meter per second

2 The pressure difference required to overcome the resistance in blood flow through the systemic circulation is primarily maintained by which organ?

A Lungs
B Kidneys
C Heart
D Brain

3 During normal breathing, what is the primary force driving air out of the lungs (exhalation)?

A Active contraction of diaphragm
B Elastic recoil of the lungs and chest wall
C Contraction of intercostal muscles
D Suction created by the diaphragm

4 What is the approximate dielectric constant of cell membranes, which is crucial for their electrical properties?

A 2-5
B 50-100
C 2-10
D 200-500

5 The phenomenon of Brownian motion, caused by the random bombardment of molecules, is directly relevant to which physiological process?

A Muscle contraction
B Blood clotting
C Diffusion of molecules across cell membranes
D Bone growth

6 What is the primary mechanism by which ultrasound waves are used for medical imaging (sonography)?

A Absorption of transmitted waves
B Reflection and scattering of emitted waves
C Refraction of incident waves
D Diffraction around tissue structures

7 The resting membrane potential of a typical neuron is approximately:

A +30 mV
B -70 mV
C 0 mV
D +70 mV

8 The process of osmosis, crucial for maintaining cell volume and fluid balance, is the net movement of solvent molecules across a selectively permeable membrane due to a difference in:

A Pressure
B Temperature
C Concentration of solute
D Electrical charge

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