BIOS 256 Exam 6 - –Answer regulate intracellular calcium concen...

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BIOS 256 Exam 6

• The major function of the sarcoplasmic reticulum in muscle contraction is to

–Answer regulate intracellular calcium concentration

• After nervous stimulation of the muscle cell has ceased, the acetylcholine

–Answer is destroyed by acetyl choline esterase

• In muscle contraction, calcium acts to

–Answer change the shape of the tro- ponin-tropomyosin complex

• The number of muscle fibers in a contracted state in an otherwise relaxed muscle is know as

its –Answer muscle tone

• In an isotonic contraction, the muscle

–Answer changes in length and moves the "load"

• A sustained and frequent muscles stimulus brings about

–Answer tetanus

• Athletes sometimes complain of oxygen debt, a condition that results when insufficient

oxygen is available to completely break down pyruvic acid. As a result the pyruvic acid is converted to –Answer lactic acid

• Which serves as a quick source to replete ATP in exercising muscle

–Answer creatine phosphate 1 / 2

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• Which of the following is true about smooth muscles

–Answer certain smooth muscle cells can actually divide to increase their numbers

• The blood vessel type bringing oxygen and nutrients to the tissues is the

–Answer artery

• You obtain a tube of blood from a patient. EDTA anticoagulant is in the tube, so the blood does

not clot. The tube is centrifuged and you remove the liquid from atop the cells. The liquid thus obtained is called –Answer plasma

• The function of hemoglobin is to

–Answer carry oxygen

• The process of forming new red blood cells is called

–Answer erythropoiesis

• When old red blood cells are worn out, their components are recycled. The global from the

hemoglobin is –Answer metabolized as amino acids

• Jane has a hemoglobin measurement of 10 g/100ml blood. This is

–Answer abnor- mally low

• All of the following can be expected with polycythemia except

–Answer low blood viscosity

• Which of the following is a precursor of a eosinophil

–Answer myeloblast

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