The patellar reflex can be defined as the kicking movement of the lower leg which occurs with a sudden twitch when the patellar tendon of a person is tapped. This patellar tendon is present below a person's kneecap. This reflex happens only when the leg is bended. It is impossible for patellar reflex to occur if the leg is straight as the quadriceps muscles are already contracted and a sudden kicking movement of the leg in such state could not be elicited. The patellar reflex protects the quadriceps from stretching too much.
Two species of sea urchins live practically side-by-side in sandy bottoms. The two species appear to have the same diet: drift seaweeds and other bits of organic matter. They can live in the same environment without competing.
As it compels them to live in the same environmental surroundings so the characteristics of living nature also get developed as their current following situation that's helping them to get the same food & habitat.
D is the Eurasian plate. It has Europe and part of Asia in it.
Answer: <u>The exocrine glands hormones could be ions, enzymes mucins, water or chemical compounds that aid in the normal functioning in the human body. The glands that are exocrine are multicellular or unicellular, based on the degree of complexity of the glands as well as their function. Some examples of these are the liver and the Salivary glands. </u><em>Endocrine glands are referred to as hormones. are released by cells in an interstitial liquid. Then, they disperse into the bloodstream, without having to pass through the canal system. The endocrine glands are responsible for monitoring the long-term activity of the body and affect the general metabolism and development in the human body. Some examples of these are the Pituitary Gland and the Adrenal Gland.</em>
Hope this helps!
