How Many of the Following Can Be Observed in the Mesohyl

question 41

Multiple Choice

How many of the following can be observed in the mesohyl of various undisturbed sponges at one time or another?
1) amoebocytes
2) spicules
3) spongin
4) zygotes
5) choanocytes

• A) one of these
• B) two of these
• C) three of these
• D) four of these
• E) five of these

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Definitions:

Proximodistal

Describes the pattern of development in children where growth starts at the center of the body and moves towards the extremities.

Central Axis

An imaginary line that is central to an object or structure, providing a point of symmetry or balance.

Axon

A long, slender projection of a nerve cell that typically conducts electrical impulses away from the neuron's cell body.

Habituation

A psychological learning process wherein there is a decrease in response to a stimulus after being repeatedly exposed to it.