In a 4-chambered heart like that of humans and sheep, the chamber with the thick

Question

In a 4-chambered heart like that of humans and sheep, the chamber with the thickest walls is the: Left atrium Right atrium Left ventricle Right ventricle Which of the following is NOT true of arteries? Arteries carry blood away from the heart The walls of arteries are more muscular than those of veins Blood pressure is higher in arteries than in veins Arteries use a system of valves to help transport blood back to the heart Which of the following is NOT true about Type II diabetes? excess body weight and a lack of exercise are risk factors represents 90% of diabetes cases, and usually appears in middle age (after age 40) cells are "starved" of glucose (using fat for cell respiration), even though blood glucose is high it is caused when the body's own immune system attacks the beta cells of the pancreas In the kidney nephron, the distal (ascending) part of the Loop of Henle (after it turns) is NOT permeable to: NaCI Urea H+ d) H_2O Blood pressure is lowest in: veins arteries venules capillaries Which of the following is true of capillaries? Capillaries have very thin walls with a single layer of squamous epithelial cells In capillaries, red blood cells travel single file Most exchange of gases and nutrients with body cells occurs at the capillary level All of the above In the proximal convoluted tubule of the nephron, toxins and H+ ions enter the filtrate from the blood. This process is called: Filtration Reabsorption Secretion Excretion The pulmonary trunk and pulmonary arteries carry blood that is: low in oxygen low in CO_2 high in oxygen returning from the lungs In most parts of the nephron, _____ is/are reabsorbed from the filtrate by the process of osmosis. toxins K+ H_2O H+

Explanation / Answer

28.) C- left ventricle.

29.) D- arteries use a system of valves to help transport blood back to the heart.

30.) D- it is caused when the body's own immune system attacks the beta cells of the pancreas.

31.) D- H2O.

32.) A- veins.

33.) B- in capillaries, red blood cells travel single file.

34.) A- filtration.

35.) D- returning from the lungs.

36.) C- H2O

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