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Biophysics Final Exam || A+ Graded Already.
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Which of the following is a false statement? A. The First Law of Thermodynamics describes energy changes associated with both reversible and irreversible processes B. Most processes observed in biological systems are readily reversible in a thermodynamic sense. C. The Second Law of Thermodyn...

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  • December 15, 2024
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  • 2024/2025
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  • which of the following is a false statement a th

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Biophysics Final Exam || A+ Graded Already.
Which of the following is a false statement?
A. The First Law of Thermodynamics describes energy changes associated with both reversible
and irreversible processes

B. Most processes observed in biological systems are readily reversible in a thermodynamic
sense.

C. The Second Law of Thermodynamics allows us to understand why some processes are
irreversible.

D. The Second Law of Thermodynamics is valid also for open systems. correct answers B. Most
processes observed in biological systems are readily reversible in a thermodynamic sense.

A close system does not exchange? correct answers Matter

At a stationary state the entropy of a system: correct answers Does not change

Which of the following are lipid bilayers permeable to? correct answers CO2

The passive efflux of calcium from the cells is due to: correct answers antiport

The sodium-potassium pump: correct answers requires ATP to function

The permeability of the resting cell membrane is the highest for? correct answers Potassium ions

During action potential: correct answers extracellular and intracellular concentrations of K+ ions
equalize

Conduction of action potentials in nonmyelinated axons is: correct answers slower

Depolarization of T tubule is directly linked to the opening of Ca+ channels on the sarcoplasmic
reticulum of: correct answers skeletal muscle

The neuro muscular synapses exist in: correct answers skeletal muscle

In cardiac muscle cells channels releasing calcium ions from sarcoplasmic reticulum are: correct
answers Ligand-gated

Which of the following proteins is involved in the activation of contractile proteins in smooth
muscle? correct answers Calmodulin

The basic phenomenon of a laser action is: correct answers stimulated emission of light

The laser light is not: correct answers white

, When the RF energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens? correct
answers The angle of precession "flips" so that the magnetic moment of the nucleus opposes/the
applied field

The name given to the relaxation process due to the return of the magnetic moments to the
thermal equilibrium distribution is: correct answers Spin-Lattice relaxation

The number of possible orientations of nuclei with spin equal to 1/2 is: correct answers 2

From the inside of the body to the skin, heat is transported by: correct answers forced convection

The fluidity of a lipid bilayer will be increased by: correct answers increasing the temperature.

Which of the following types of membrane transport does not require the use of a transport
protein? correct answers simple diffusion

The propagation of actions potentials is faster in the axons with: correct answers myelin sheath

Which of these is part of the contraction process of smooth muscle? correct answers Calcium
ions bind to calmodulin

Nuclear magnetic resonance does not occur for nuclei with spin (I): correct answers I = 0

The plasma membrane is: correct answers a mosaic of proteins in a fluid bilayer of
phosphofluids

In cell membranes, energy for primary active transport comes from: correct answers ATP, light
or other sources that move ions and other solutes.

In order for a neuron to fire it must first: correct answers exceed a given threshold then it will
cause the target neuron to fire an action potential that travels down the axon until it reaches the
synapses, which will cause the release of neurotransmitters.

During depolarization of a nerve cell: correct answers sodium channels open, allowing an influx
of Na+ ions. The cell membrane potential becomes positive. The cell is depolarized.

A smooth muscle fiber has no: correct answers T tubules and troponin

The heat is transported from the inside of a human body to the skin surface mainly by: correct
answers forced convection

The term non-ionizing radiation refers to any type of electromagnetic radiation that does not
carry enough energy per quantum to remove an electron from: correct answers the outer shells of
atoms.

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