Question

Hypothalamus of the brain is not involved in this function:
(a)Sleep-wake cycle
(b)Osmoregulation and thirst
(c) Temperature control
(d) Accuracy of muscular movements

Answer 1

Hypothalamus has both nervous and endocrine roles. It governs the functioning of the pituitary gland and nervous system. The cerebellum plays a critical role in this neural control of movement and damage to this part of the brain or its connecting structures and pathways results in impairment of coordination, known as ataxia. The cerebellum is located behind the brain stem.

Complete answer:
The Hypothalamus of the brain is not involved in the coordination of Muscular movements. Muscular movements are controlled by the cerebellum of the brain. The neurosecretory cells of the hypothalamus secrete different hormones. These hormones are involved in functions like temperature regulation, sleep and wake control cycle, osmoregulation, homeostasis, thirst, hunger, and mood. Hypothalamus governs the functioning of the pituitary gland and nervous system, controls emotional responses, regulates body temperature and water balance arouses the hunger drive. It serves as a link between the nervous and endocrine systems and directly or indirectly controls most of the hormonal activities. It receives inputs from other parts of the brain and also from the hormones in the blood. In response to these inputs, it secretes several regulating hormones that regulate the release of pituitary hormones.

Additional Information: -Hypothalamus secretes three major groups of hormones; regulating hormones, oxytocin, and vasopressin.
-Regulating hormones are then transported to adenohypophysis by blood.
-Vasopressin and oxytocin are transported to the neurohypophysis.
So, the correct answer is 'Accuracy of muscular movements'

Note: -When the hypothalamus is excited by appropriate stimuli, the impulses would be transmitted to the axon endings of the neurosecretory cells.
-These impulses would cause the release of the stored hormones from axon terminals to blood. Blood will carry them to their target sites.
-The hypothalamic regulating hormones govern the production and release of pituitary tropic hormones.