____________are often called extremophiles, because they can survive in some of the harshest environments on earth
Fill in the blank with the correct word.
Answer: Archaea
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The ________ muscle partitions the neck into the anterior and posterior triangles.
Fill in the blank(s) with the appropriate word(s).
Composition of the plasma and the interstitial fluid differs chiefly in the concentration of
A) water. B) dissolved oxygen and carbon dioxide. C) glucose and other sugars. D) sodium ions. E) All of the answers are correct.
In the myofibril the protein that possesses the active site for myosin heads to bind is called
What will be an ideal response?
Place the following steps in the correct order for transduction of a chemical odorant into a nerve signal
1. Odorants reach receptors in the cilia of olfactory neurons. 2. cAMP opens ions channels that allow sodium and calcium ions to enter the cell. 3. The G-protein activates an enzyme, adenylate cyclase, to convert ATP into cyclic AMP (cAMP). 4. The binding of an odorant activates a G-protein which then detaches from the receptor. 5. The membrane is depolarized. Depolarization that reaches threshold at the axon hillock triggers an action potential and transduction has been achieved. A) 1, 3, 4, 2, 5 B) 1, 4, 3, 2, 5 C) 1, 2, 3, 4, 5 D) 1, 4, 2, 3, 5