Which is true when your sympathetic nervous system is more active?
a. The SA node depolarizes more rapidly.
b. The myocardium repolarizes more frequently during one minute.
c. More Ca2+ becomes available and causes more forceful heart contractions.
d. Norepinephrine is stimulating the heart.
e. All of the above are true.
E
You might also like to view...
Apoptosis begins with a cell receiving a signal to die.
Answer the following statement true (T) or false (F)
At the knee, a bone called the ____________ is embedded within the tendon of the quadriceps femoris muscle
Fill in the blank with correct word.
Match the structure with its function: Microtubules of the cytoskeleton.
A)Determine the overall shape of the cell as well as distribution of cellular organelles B)Lipid synthesis C)Intracellular digestion D)Protein synthesis E)Organize the spindle during mitosis
What cardiac arrhythmia will have no QRS complex as a symptom?
A. atrial fibrillation B. ventricular fibrillation C. bradycardia D. premature ventricular contractions