Which Layer of the Egg Contains Species-Specific Receptors for the Sperm

question 45

Multiple Choice

Which layer of the egg contains species-specific receptors for the sperm?

• A) A
• B) B
• C) C
• D) D

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Definitions:

Treppe Stimulus

A phenomenon where muscle contractions become more forceful with subsequent stimulations, due to increased calcium availability.

Threshold

The minimum level of stimulation required to trigger a neural impulse or a response in a sensory system.

AChE

Acetylcholinesterase, an enzyme that breaks down acetylcholine, a neurotransmitter, in the synapse, terminating the signal between nerves.

Relaxation Phase

The phase in the cardiac cycle or muscle contraction where the muscle returns to its initial state of relaxation.