Mitral valve prolapse severe enough to cause regurgitation may directly cause INCREASE pressure in the LEFT atrium. Mitral valve prolapse is a medical condition in which the the two valve flaps of the mitral valve do not close properly, bulging upward into the left atrium. The condition may be mild or severe. Heart surgery may be required in case of the severe one.
Answer:
A - True
Explanation:
Summary. Multiple types of evidence support the theory of evolution: Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features).
Answer:
this question is not 50 points just sayin
Explanation:
Based on the given information above, the correct answer from the given question would be option C. From the testing done by Michelle, it reveals that the shells are made of calcium carbonate and therefore, they are foraminiferans, belonging to phylum sarcodina of protozoa. Foraminifera are very small organisms which live in the sea, that create calcium carbonate shells for protection.
Answer:G protein action
Explanation:
Signal transduction through protein action is through G protein coupled receptors (GPCR). Binding of different types of signal molecules to G protein couple receptors is a general mechanism of signal transduction.
G proteins act as an intermediary to a stimulation of a receptor. When an extracellular messenger, the hormone (H) combines with the specific receptor (R) on the plasma membrane. The H-R complex activates the regulatory components of G proteins. The G-protein inturn will interact with the effect proteins which may be enzymes or ion channel proteins, which result in the desired effect.
