Answer:
a is correct
Pinna (earlobe) - external auditory canal - tympanic membrane - ossicles - cochlea - organ of corti - brain
Explanation:
The statement that is true regarding criteria and constraints is that criteria are more important than constraints (option A).
<h3>What are criteria and constraints in engineering?</h3>
Criteria in engineering are things a design needs to do in order to be successful, like its requirements.
On the other hand, constraints are limitations on the design e.g. materials available, the cost of the materials, the amount of time they have to develop the solution, etc.
Since the design criteria are the explicit goals that a project must achieve in order to be successful, they are far more important than the constraints.
Therefore, the statement that is true regarding criteria and constraints is that criteria are more important than constraints.
Learn more about criteria and constraints at: brainly.com/question/5498461
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Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secreted by the thyroid gland and sets into motion responses to lower the blood calcium back to the set point. If the blood calcium level falls below a set point, the parathyroid gland secretes parathyroid hormone that sets into motion responses to raise the blood calcium. These homeostatic responses are examples of:
a. positive feedback
b. effectors
c. sensors
d. negative feedback
Answer:
d. negative feedback
Explanation:
Negative feedback responses are the ones that counteract the change. Any alterations in the internal body conditions such as blood calcium levels are sensed by receptors. The information is sent to the brain which in turn commands the effectors such as endocrine glands to secrete the required hormones to restore the normal conditions. Here, changes in the calcium levels are counteracted by the secretion of calcitonin and parathyroid hormones and the calcium is maintained within a narrow range. This represents negative feedback.