Conversely, if Lk >Lk0  and DLk >0 means positive, then the DNA is “positively supercoiled.”

TLS Online TPP Program

#Id: 8950

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 1926

#Unit 4. Cell Communication and Cell Signaling

Classical Pathway

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#Id: 6590

#Unit 7. System Physiology – Animal

Follicle-stimulating hormone, secreted by the anterior pituitary gland, stimulates the Sertoli cells; stimulates, the process of spermiogenesis

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#Id: 9316

#Unit 4. Cell Communication and Cell Signaling

Light absorption by rhodopsin→activation of a cGMP PDE → hydrolyzes cGMP to 5′-GMP→ cGMP levels  drop →channel close →membrane hyperpolarization→reduction in NT release→transmitted to brain

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#Id: 5531

#Unit 7. System Physiology – Animal

Transepithelial Voltage 

Cl− diffusion establishes a Cl− diffusion potential, making the lumen positive with respect to blood.