Name two problems that can arise for pregnant women who contract toxoplasmosis
What will be an ideal response?
Miscarriage, stillbirth, or children with birth defects.
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When two or more polypeptide chains come together to give a protein its ultimate shape, that structure is described as the _________ structure
A. micro- ?B. secondary ?C. quaternary ?D. tertiary ?E. heme group
Which of the following is the dominant method of carbon dioxide transport?
a) Bound to hemoglobin b) Bound to oxygen c) Dissolved in plasma as a gas d) Dissolved in plasma as bicarbonate ions e) Diffusion
Why are you able to repeatedly contract and relax your muscles of respiration, allowing you to breathe in and breathe out?
a. As soon as all of the Ca2+ stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs. b. After the muscle cell becomes excited, acetylcholinesterase rapidly destroys acetylcholine. c. When there is no longer a local action potential in the muscle cell, Ca2+ is actively transported back into the lateral sacs of the sarcoplasmic reticulum, and muscle relaxation occurs. d. Both (b) and (c) above. e. All of these answers.
The movement of a substance from an area of high concentration to an area of lower concentration is called ________.
A. facilitated diffusion B. active transport C. diffusion D. endocytosis E. osmosis