Answer to Question 1
(1 ) Thermal pressure occurs when the particles inside a star are heated enough so that their random motions cause an outward pressure. The two energy sources of internal thermal pressure are gravitational contraction, found in protostars and when a star has used up a fusionable material in its core, and nuclear fusion, which can occur in the core or in a shell of a star.
(2 ) Degeneracy pressure arises from the idea of quantum mechanics that two electrons (or neutrons) cannot occupy the same state. Degeneracy pressure occurs in the cores of low-mass stars before a helium flash, maintains equilibrium in white dwarfs and neutron stars, and may be present immediately before a supernova event.
(3 ) Radiation pressure exists only in massive stars where fusion rates are so high that photons transfer momentum to the surrounding gas and apply a third kind of pressure.
Answer to Question 2
TRUE
Types of active transport.
Relationship between Hox gene number and body complexity in different types of animals.
Blood pressure cuffs come in various sizes
Hormonal and nervous factors influencing blood pressure
The sounds auscultated during blood pressure measurement
Types of Synapses