作者:Mihaela Luca 13 天以前
43
In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed
Nuclear energy originates from the splitting of uranium atoms – a process called fission.
This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.
Write down the advantages and disadvantages of Nuclear Energy.
A wind turbine, or alternatively referred to as a wind energy converter, is a device that converts the wind's kinetic energy into electrical energy.
Wind turbines are manufactured in a wide range of vertical and horizontal axis.
Write down the advantages and disadvantages of Wind turbines.
Solar energy begins with the sun. Solar panels are used to convert light from the sun, which is composed of particles of energy called 'photons', into electricity that can be used to power electrical loads.
Write down the benefits of using solar panels.
Hydrogen fuel is a zero-emission fuel burned with oxygen.
It can be used in fuel cells or internal combustion engines.
Name the advantages and disadvantages of Hydrogen fuel.
There are many different types of energy, which all fall into two primary forms – kinetic and potential.
Energy can transform from one type to another, but it can never be destroyed or created.
Gravitational energy is a form of potential energy.
It is energy associated with gravity or gravitational force, in other words, the energy held by an object when it is in a high position compared to a lower position.
Give examples.
Thermal energy is created from the vibration of atoms and molecules within substances. The faster they move, the more energy they possess and the hotter they become. Thermal energy is also called heat energy.
Give examples of heat energy.
Motion energy or mechanical energy is the energy stored in objects; as objects move faster, more energy is stored.
Examples of motion energy include wind, a flowing river, etc.
Give more examples.
tractul nervos hipotalamo-hipofizar - între hipotalamusul anterior și neurohipofiză
legătură vasculară - sistemul port - hipotalamo-hipofizar - între regiunea mediană a hipotalamusului și adenohipofiză
Energy storage is the capture of energy produced at one time for use at a later time. A device that stores energy is generally called an accumulator or battery.
The battery acquires its charged condition either by recharging or in the manufacturing of the unit.
During discharge, the chemical on the anode releases electrons, and ions in the electrolyte undergo an oxidation reaction.
Name the particular compounds in which energy is stored:
stimulează contracția musculaturii netede a uterului gravid; stimulează expulzia laptelui din glanda mamară
crește absorbția facultativă a apei la nivelul tubilor distali și colectori ai nefronului; reduce secrețiile tuturor glandelor exocrine
Diabet insipid
Flywheel energy storage (FES) works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy.
Write down the main components of a typical flywheel.
MSH
stimulează pigmenetogeneza
hormoni non-glandulotropi
Prolactina/LTH, mamotrop
stimulează, la femeie, secreția lactată a glandei mamare; inhibitor al activității gonadotrope (capabilă să prevină ovulația)
STH/hormon de creștere
stimulează creșterea organismului, condrogeneza, îngroșare oaselor lungi, dezvoltarea oaselor late, creșterea mușchilor și a viscerelor, cu excepția creierului, retenția de compuși ai Ca, Na, K, P, N
la copil
Piticism (nanism) hipofizar
hipesecreția
după pubertate
Acromegalia
înainte de pubertate
Gigantismul
hormoni glandulotropi
FSH, LH/gonadotropi
controlează funcția gonadelor
LH - la bărbat - stimulează secreția de androgeni; la femeie- determină ovulația și apariția corpului galben (estrogen și progesteron);
FSH- la bărbat-stimulează dezvoltarea tubilor seminiferi și spermatogeneza; la femeie-creșterea și maturarea foliculului de Graaf și secreția de estrogeni
TSH/tireotrop
stimulează sinteza și secreșia de hormoni tiroidieni
hiposecreția
insuficiența tiroidiană
hipersecreția
boala Basedow
ACTH/adrenocorticoptrop
stimulează activitatea secretorie a glandei corticosuprarenale