Erection

question 131

Multiple Choice

Erection

• A) involves dilation of the arterioles supplying the sponge-like vascular spaces of the penis
• B) results from cGMP production induced by nitric oxide
• C) occurs when the seminiferous tubules of the penis become engorged with sperm
• D) occurs in response to sympathetic nervous stimulation of the penis
• E) involves dilation of the arterioles supplying the sponge-like vascular spaces of the penis, and results from cGMP production induced by nitric oxide

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Definitions:

Epiphytes

Plants that grow on other plants for physical support but do not extract nutrients from their hosts, thus not parasitic.

Species Richness

A measure of the number of different species represented in an ecological community, landscape or region.

Disturbance Hypothesis

posits that disturbances in an ecosystem can create opportunities for new species to colonize, thus affecting biodiversity.

Mycorrhizae

A symbiotic association between a fungus and the roots of a vascular host plant, enhancing nutrient and water absorption.