Answer:

Angular acceleration, also called rotational acceleration, is a quantitative expression of the change in angular velocity that a spinning object undergoes per unit time. It is a vector quantity, consisting of a magnitude component and either of two defined directions or senses.

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Answer:

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Step 1: Let's dissect the options one by one to see which statements about the hypothalamus are true.

The hypothalamus is indeed situated at the base of the thalamus, which is option (a). This is a strategic location that allows it to play a central role in linking the nervous system to the endocrine system via the pituitary gland.

Next, the hypothalamus contains neurosecretory cells, as stated in option (b). These cells are crucial because they produce hormones that control various physiological processes.

Lastly, the hypothalamus contains the center for thermoregulation, which is option (c). This center is responsible for maintaining the body's core temperature within a narrow, healthy range despite external temperature changes.