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Regulating water The water levels in her body are low/ she is dehydrated - NSC Life Sciences - Question 4 - 2017 - Paper 1
Question 4
Regulating water The water levels in her body are low/ she is dehydrated. - Osmoreceptors are stimulated by the low water levels and send impulses to the pituitary ... show full transcript
Worked Solution & Example Answer:Regulating water The water levels in her body are low/ she is dehydrated - NSC Life Sciences - Question 4 - 2017 - Paper 1
Step 1
The water levels in her body are low/ she is dehydrated.
Answer
The osmoreceptors in the hypothalamus detect low water levels and send signals to the pituitary gland. This leads to an increase in the secretion of Antidiuretic Hormone (ADH), which enhances water reabsorption in the kidneys.
Step 2
Balance is achieved in the following way:
Answer
The dynamics of balance involve the structure known as the maculae located in the utriculus and saccule, along with the cristae found in the semi-circular canals. These structures are stimulated to generate impulses that travel through the auditory nerve to the cerebellum. The cerebellum interprets these signals and coordinates responses by sending impulses via the motor neuron to skeletal muscles.