Rods are active in dim light.
Answer the following statement true (T) or false (F)
True
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Regions of MALT called Peyer patches are found in the
A. urinary bladder. B. stomach. C. vagina. D. small intestine. E. trachea.
What is the result of sympathetic stimulation to the heart?
A. Decreased cardiac output B. Decreased heart rate C. Increased heart rate and force D. Decreased intraventricular pressure E. Squeezing of the pericardial sac
Which is the normal sequence of the spread of cardiac excitation?
1 . AV node 2 . SA node 3 . atria 4 . Purkinje fibers 5 . Bundle of His 6 . ventricular myocardium a. 2-3-1-5-4-6 b. 3-2-1-4-5-6 c. 2-3-1-4-5-6 d. 1-2-3-4-5-6 e. none of these answers.
What does the depolarization of the transverse tubules (T-tubules) promote?
A) binding of acetylcholine to ligand-gated sodium ion channels B) release of calcium from the sarcoplasmic reticulum C) entry of sodium ions into the muscle fiber through voltage-gated sodium ion channels D) release of acetylcholine from vesicles in the motor neuron into the synaptic cleft