Describe the macroscopic anatomy of the human excretory system
What will be an ideal response?
The human has two kidneys below and behind the liver. They receive an extensive blood supply, and ultimately produce urine. Urine is drained from the kidneys via the paired ureters, which empty urine into the urinary bladder. Upon urination, urine empties through the urethra.
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Why is ATP an important molecule in metabolism?
A) Its hydrolysis provides an input of free energy for exergonic reactions. B) It provides energy coupling between exergonic and endergonic reactions. C) Its terminal phosphate group contains a strong covalent bond that, when hydrolyzed, releases free energy. D) Its terminal phosphate bond has higher energy than the other two phosphate bonds. E) It is one of the four building blocks for DNA synthesis.
Arsenic poisoning can lead to organ failure and death. Though arsenic can inhibit or interfere with a number of cellular enzymes, arsenic poisoning is thought to be mainly due to indirect inhibition of enzymes involved in both pyruvate oxidation and the Krebs cycle. As a result, this compound must be able to enter which cellular compartment?
A. The cytoplasm B. The nucleus C. The intermembrane space of the mitochondria D. The mitochondrial matrix E. The endoplasmic reticulum Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about pyruvate oxidation and the Krebs cycle? What other information is related to the question? Choose Answer Do you have all necessary information to determine where arsenic poisoning would have its greatest impact within the cell?
During parturtition, mechanical pressure
caused by the movement of the fetus through the uterus causes the release of ___ from the ___.
a. HCG---hypothalamus b. oxytocin---posterior pituitary c. oxytocin---hypothalamus d. HCG---posterior pituitary e. oxytocin---adrenal cortex
What kind of bond is found between the individual atoms of a single water molecule?
A) hydrogen bonds B) ionic bonds C) covalent bonds that are not polar D) covalent bonds that are polar