Why is high body sodium content generally associated with high blood pressures?
What will be an ideal response?
Answer: Sodium chloride accounts for about 90% of the osmotic pressure in the extracellular fluid. If sodium content of the body is higher, this will tend to pull water by osmosis into the extracellular compartment, including the plasma, raising blood volume and blood pressure.
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For relaxation to occur,
A. calcium leaves the sarcoplasmic reticulum, and troponin binds calcium and blocks the binding sites on actin. B. calcium enters the myofibril, it detaches from myosin, and the binding sites on myosin become inactive. C. sarcoplasm calcium levels fall, calcium is removed from troponin, and tropomyosin blocks binding sites on actin. D. extracellular calcium levels fall, calcium is pumped into the myofibril, and tropomyosin slides away from actin.
Gram positive bacteria accept the blue stain of crystal violet
Indicate whether the statement is true or false
Common second messengers include cAMP, acetylcholine, and calcium ions
Indicate whether the statement is true or false
Which of the following statements about the femur is TRUE?
A. The head of the femur articulates with the tibia. B. The medial condyle articulates with the acetabulum. C. Both the greater and lesser trochanters are attachment sites for muscles. D. The distal end of the tibia articulates with the femur. E. The proximal end of the femur articulates with the tibia.