physics 3

37問 • 1年前

Merve

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問題一覧

What is the actual membrane potential of erythrocytes in vivo?

-9mV

What points of human body are connected to electrods during electrocardiography?

2 electrods to down limps, 2 electrods tothe arms

According to Einthoven theory, the heart's electrical model is based on what?

The current dipole

How does viscosity depend on the temperature?

when temperature increases viscosity decreases

-In case of the vessels branches:

The hydraulic resistance of the vessel system decreases

What terms of membrane can be estimated by Nernst -Equation at thermodynamic equilibrium?

Passively distribution of ions as a function of the electrical potential and electrical potential which is induced by an unequal distribution of ions

The volumic speed of the blood

does not depend on the cross-sectional area of the vessel

What is the transmembrane potential of dividing (cells of embryos or cancer cells) and nondividing (neurons or skeletal muscles)?

For dividing cells it alters between -10 and -30 mV, For nondividing cells -70 and -90 mV

The decreasing factors of the vessel system's hydraulic resistance are: 1- The branches of the vessels; 2- the increasing of the vessels' radius; 3- the decreasing of the vessels' radius; 4- the increasing of the blood viscosity, 5-the decreasing of the blood viscosity

1,2,5

When pulse waves of the heart partly become damped?

Pulse waves damped by the increasing of elasticity of the vessels walls.

When the blood flow becomes turbulent?

During opening of Mitral and aortic valves and when the heart rapidly ejects the blood through aortic valve

In a bilipid layer during from "fluid" state to "rigid" state transition the membrane thickness:

increases

The electroencephalography is:

the registration of electric field of a brain

Compare the pressure drop of the blood in the aorta (APA) and in the capillaries (APK):

APK >> APa

What ions are the most important in the development of membrane potential in nerve and muscle fibers as well as in the neuronal cell in the nervous system?

sodium, potassium and chloride ions

In the membrane the diffusion velocity of the neutral substance depends on

the temperature and concentration gradient

What is the unit of share rate or velocity gradient?

sec

Normally in the which vessel the flow of the blood could be turbulent?

Near the heart valves

During passive transport in the membranes:

the cell aspires to an equilibrium state

In the membranes the "gel-liquid crystal" transitions

occur by increasing of temperature

Which type of egate»s have Na channels?

the fastly activating and the slowly inactivating

What is the membrane hyperpolarization?( membrane hyper polarization)

Increasing of the membrane potential

In what part of the body the hydrostatic pressure is more?

In the lower extremites

What is the depolarization of a membrane?

rapid rise of membrane potential

Clinically measurement method of the lymph's fluid's viscosity is

Viscometer

In the biological membranes the ionic channels are:

the system consisting of the integral proteins

During excitation, which one from the followings is true for membrane? (Pj – the permeable coefficient of the membrane for j ion):

P Na+>P K+>P CI

The distribution velocity of action potential is depend on:

The electric resistance of a membrane

-The viscosity of blood:

changes at pathologies

In a bilipid layer during from "liquid crystal" state to "gel" state transition the membrane thickness

increases

if it is considering, the aortic lumen radius of about 2 cm, the linear speed of the blood in the aorta of 50 cm/sec, find the volume velocity of the bleeding in the aorta (if t = 3)

600 cm/s

The volume velocity of the blood

does not depend on cross-sectional area of the vessel

During contraction the efficiency of muscles is equal to?

the ratio of the work to the used energy

-What does the hydraulic resistance of the blood depend on?

the vessel radius cavity

What is resting potential?

the potential difference between cell cytoplasm and intercellular liquid in a physiological resting state

The resting potential of the cell membrane approximately U=80 mV. If consider, the electric field strength is homogeneous in the inner of the membrane, find the intensity of this field The thickness of the membrane i I =8 nm.

10 V/m

The linear velocity of the blood in the big vessels

03 - 0,5 m/s

physiology

physiology

physiology

physiology

biochemistry

biochemistry

physics

physics

biophysics

biophysics

physiology respiratory 1-50

Merve · 50問 · 1年前

physiology respiratory 1-50

physics 2

physics 2

micro 19-23

micro 19-23

micro toplu

micro toplu

pathology

pathology

問題一覧

What is the actual membrane potential of erythrocytes in vivo?

-9mV

What points of human body are connected to electrods during electrocardiography?

2 electrods to down limps, 2 electrods tothe arms

According to Einthoven theory, the heart's electrical model is based on what?

The current dipole

How does viscosity depend on the temperature?

when temperature increases viscosity decreases

-In case of the vessels branches:

The hydraulic resistance of the vessel system decreases

What terms of membrane can be estimated by Nernst -Equation at thermodynamic equilibrium?

Passively distribution of ions as a function of the electrical potential and electrical potential which is induced by an unequal distribution of ions

The volumic speed of the blood

does not depend on the cross-sectional area of the vessel

What is the transmembrane potential of dividing (cells of embryos or cancer cells) and nondividing (neurons or skeletal muscles)?

For dividing cells it alters between -10 and -30 mV, For nondividing cells -70 and -90 mV

1,2,5

When pulse waves of the heart partly become damped?

Pulse waves damped by the increasing of elasticity of the vessels walls.

When the blood flow becomes turbulent?

During opening of Mitral and aortic valves and when the heart rapidly ejects the blood through aortic valve

In a bilipid layer during from "fluid" state to "rigid" state transition the membrane thickness:

increases

The electroencephalography is:

the registration of electric field of a brain

Compare the pressure drop of the blood in the aorta (APA) and in the capillaries (APK):

APK >> APa

What ions are the most important in the development of membrane potential in nerve and muscle fibers as well as in the neuronal cell in the nervous system?

sodium, potassium and chloride ions

In the membrane the diffusion velocity of the neutral substance depends on

the temperature and concentration gradient

What is the unit of share rate or velocity gradient?

sec

Normally in the which vessel the flow of the blood could be turbulent?

Near the heart valves

During passive transport in the membranes:

the cell aspires to an equilibrium state

In the membranes the "gel-liquid crystal" transitions

occur by increasing of temperature

Which type of egate»s have Na channels?

the fastly activating and the slowly inactivating

What is the membrane hyperpolarization?( membrane hyper polarization)

Increasing of the membrane potential

In what part of the body the hydrostatic pressure is more?

In the lower extremites

What is the depolarization of a membrane?

rapid rise of membrane potential

Clinically measurement method of the lymph's fluid's viscosity is

Viscometer

In the biological membranes the ionic channels are:

the system consisting of the integral proteins

During excitation, which one from the followings is true for membrane? (Pj – the permeable coefficient of the membrane for j ion):

P Na+>P K+>P CI

The distribution velocity of action potential is depend on:

The electric resistance of a membrane

-The viscosity of blood:

changes at pathologies

In a bilipid layer during from "liquid crystal" state to "gel" state transition the membrane thickness

increases

if it is considering, the aortic lumen radius of about 2 cm, the linear speed of the blood in the aorta of 50 cm/sec, find the volume velocity of the bleeding in the aorta (if t = 3)

600 cm/s

The volume velocity of the blood

does not depend on cross-sectional area of the vessel

During contraction the efficiency of muscles is equal to?

the ratio of the work to the used energy

-What does the hydraulic resistance of the blood depend on?

the vessel radius cavity

What is resting potential?

the potential difference between cell cytoplasm and intercellular liquid in a physiological resting state

10 V/m

The linear velocity of the blood in the big vessels

03 - 0,5 m/s