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Answer:</h2><h2>☠☠☠⭐⭐</h2>
The efficiency of movement of substances in and out of a cell is determined by its volume to surface area ratio.
If they rub together it can make earthquakes and cause landslides or buildings to topple.
<span>The correct
answer is c. hypothalamus to pituitary gland to adrenal glands.
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When
it comes to stress, hypothalamus-pituitary-adrenal axis (HPA) is responsible for
stress response. Hypothalamus releases corticotropin-releasing hormone (CRH)
which binds to its receptors on the anterior pituitary gland. As a result, adrenocorticotropic hormone (ACTH) is released and it stimulates the release of
cortisol from the adrenal gland. At a certain levels of cortisol, this steroid
hormone exerts negative feedback to the hypothalamic release of CRH.
<span>Aplysia is a marine gastropod mollusc which is an often used model organism in neuroscience, especially on the cellular biology of learning and memory. What makes them easy to work with are their giant neurons, which are one of the largest. Aplysia neurons are suitable for studies of how neurons and neural circuits control behaviours. Its defensive reflex has been studied because it is mediated by electrical synapses, which allow several neurons to fire synchronously.</span>
