Q1. When oxygen is added to the anaerobic suspension of cells consuming glucose at a high rate, the rate of glucose consumption declines dramatically as the oxygen is used up, and accumulation of lactate ceases. This effect was first observed by Louis Pasteur in the 1860s and is characteristic of […]

Frederick Griffith accidentally discovered transformation when attempting to develop a vaccine for pneumonia. He injected mice with samples from S-strain (virulent) and/or R-strain (non-virulent) pneumococci bacteria (Streptococcus pneumonia). Which of the following results is not consistent with Griffith’s experiments? a. injected R-strain; mouse lives. b. injected S-strain; mouse dies. c. […]

1) Refilling a toilet tank after a flush is an example of positive feedback 2) Intercellular fluid is considered a cell’s external environment when discussing homeostasis in the body 3) A person’s core temperature is not a variable since it can be held steady through homeostasis 4) Shivering is negatively […]

Malformations in the lymphatic system, called lymphangiomas, are overgrowths of the one-way lymph channels. Rarely, in infants and children, these channels grow abnormally large and cause deformity or death if the overgrowth chokes off a child’s airway or interferes with other aspects of heart and lung function. The deformity tends […]