What Did the Extinction at the End of the Pleistocene

question 66

Multiple Choice

What did the extinction at the end of the Pleistocene affect?

• A) only marine organisms
• B) terrestrial mammals weighing more than 40 Kg
• C) terrestrial mammals weighing less than 40 Kg
• D) marine mammals weighing more than 40 Kg
• E) all mammal groups equally

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Definitions:

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.

Gamma Motor Neurons

Neurons that control the sensitivity of muscle spindle fibers to stretch, thereby adjusting the tension of muscles.