An increase in cardiac sympathetic activity ____________________ the rate of depolarization of the SA node
Fill in the blank(s) with correct word
increases
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What reflex causes muscle relaxation?
A) stretch reflex B) crossed-extension reflex C) Golgi tendon reflex D) flexion (withdrawal) reflex
The ligaments that limit the anterior-posterior movement of the femur and maintain the alignment of the femoral and tibial condyles are the ________ ligaments
A) cruciate B) fibular collateral C) patellar D) popliteal E) tibial collateral
The Bohr effect refers to the
A. mechanism involved in diffusion of nitrogen into the blood. B. physical laws governing the solubility of gases in fluids. C. effect of pH on the oxygen-hemoglobin dissociation curve. D. chemical equilibrium between carbonic acid and bicarbonate in the blood. E. effect of temperature on the oxygen-hemoglobin dissociation curve.
As a muscle gets stronger the diameter of its individual muscle cells becomes larger. Which of the following structures ensures that the membrane potential change is translated into the depth of the cell?
A. Z lines B. Transverse tubules C. Sarcoplasmic reticulum D. Pores in the plasma membrane E. H zone