Answer:petroleum
Explanation: Others can be renewed
The bird's eye contains a nictitating membrane which is a translucent, semitransparent inner eyelid. It sweeps across the surface of the eye enabling the bird to blink without losing sight of or without blocking their view.
Birds also have two different tear glands. One type of tear gland is located along the lower eyelid while the other is located at the base of the nictitating membrane. The second tear gland lubricates the bird's eyes whenever the nictitating membrane blinks.
According to the research, the correct option is They bind to intracellular receptors. Steroid hormones are lipophilic this allows steroid hormones to bind to intracellular receptors.
<h3>What are
Steroid hormones?</h3>
They are lipids with a polycyclic structure from which different compounds are derived that are relevant to biology and interact with intracellular nuclear receptors.
Steroids are lipophilic hormones that are found in nature and can easily enter the cell, cross the cytoplasm and reach the nucleus, exerting their action by binding to intracellular receptors, although they can also be synthesized in laboratories.
Therefore, we can conclude that according to the research, the correct option is They bind to intracellular receptors. Steroid hormones are lipophilic this allows steroid hormones to bind to intracellular receptors.
Learn more about Steroid hormones here: brainly.com/question/13561563
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Blood flow through the ears allowing for heat dissipation!!!!!
