What system is one in which hormones are fed back to inhibit the original signal

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago.

Why is it important for arteries to have thicker lining/walls than veins?

Which of the following macro molecules consist of long chains of amino acids?

What is the correct order for the events of neurotransmitter release from the synaptic terminal? 1 - Extracellular Ca2 + enters terminal and binds to sensor protein in the cytoplasm 2 - Exocytosis of neurotransmitter into synaptic cleft 3 - Action

If the diploid number in a liver cell is 52 how many chromosomes are there in the egg

You are studying the source of new virus that has recently infected humans. You suspect that the virus was transferred from other primates (they exhibit a similar infection), specifically chimpanzees, gorillas, or orangutans.

According to the diagram liverworts are

What type of compounds always contain carbon and hydrogen

What is the junction between a nerve cell and another cell called: axon, synapse, dendrite, none of the above

1. Synthesize Information How do you explain to the horse owner why this foal was born with OLWS while two previous foals were perfectly healthy? What would you tell the new parents of the baby girl about their prospects for having more children?