If Gastrulation Was Blocked by an Environmental Toxin, Then

question 3

Multiple Choice

If gastrulation was blocked by an environmental toxin, then

• A) the blastopore would form the mouth.
• B) cleavage would not occur in the zygote.
• C) embryonic germ layers would not form.
• D) the blastula would not be formed.
• E) fertilization would be blocked.

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Definitions:

Homeostatic

Relating to homeostasis, the process by which living organisms regulate their internal environment to maintain a stable, constant condition.

Reflexes

Automatic, involuntary responses to specific stimuli that are designed to protect the body and maintain homeostasis, occurring without conscious thought.

Knee-Jerk Reflex

Another term for the patellar reflex, indicating the spontaneous kicking movement of the lower leg in response to a sharp tap on the patellar tendon.

Inhibitory Interneurons

Neurons that decrease the likelihood of a target neuron firing, playing a key role in the modulation of neural circuits.