Explain how ADH works in the body when it is released by the hypothalamus.
What will be an ideal response?
The hypothalamus releases ADH, which is then stored in the axon terminals of the posterior pituitary. Neural cells monitor the water-salt balance of the blood. When it is determined that the blood is too concentrated, ADH is released causing the kidneys to reabsorb the water. As the blood becomes more dilute, ADH is no longer released.
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Which of the following DOES NOT identify a particular advantage in using Arabidopsis to study plant
development and genetics? a. The Arabidopsis genome has been sequenced. b. Arabidopsis mutants can be easily induced with chemicals. c. Many developmental mutants have been identified in Arabidopsis. d. This plant completes its life cycle in just a few weeks. e. It is a weed of no economic importance
How would a calcium deficiency affect the process of skeletal muscle contraction?
A) Skeletal muscles would not be able to utilize ATP as a source of fuel. B) The action potential would be blocked from entering the muscle fiber. C) The myosin heads would remain attached to actin molecules. D) Myosin heads would not bind to actin efficiently.
Many apoenzymes are inactive by themselves and must be activated by
a) cofactors and/or coenzymes. b) ATP. c) holoenzymes. d) substrates.
Parasitic fungi will usually attack a plant through stomata on the root surface.
Answer the following statement true (T) or false (F)