The Species-Energy Hypothesis

Available energy determines species richness.

Increased solar energy, together with an abundance of water, results in high productivity of plants.

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#Unit 5. Developmental Biology

T-cell education

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#Unit 7. System Physiology – Animal

When the cholinergic vagal fibers to nodal tissue are stimulated, the membrane becomes hyperpolarized and the slope of the prepotentials is decreased

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#Unit 13. Methods in Biology

The characteristic absorption parameter for the sample is the extinction coefficient a, yielding the correlation I= I 0 e -d .

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#Unit 10. Ecological Principles

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#Unit 7. System Physiology – Animal

Impulses from nociceptors are transmitted via two

fiber types:

Thinly myelinated Aδ fibers (2–5 μm in diameter) that conduct at rates of ∼12–35 m/s 

Unmyelinated C fibers (0.4–1.2 μm in diameter) that conduct at low rates of ∼0.5–2 m/s