Reduced levels of blood Ca2+ ________.
A. decrease both heart rate and contraction strength
B. decrease heart rate but do not affect heart contraction strength
C. increase both heart rate and contraction strength
D. increase heart rate but do not affect heart contraction strength
Answer: A
You might also like to view...
Purpose of enzymes in the saliva
What will be an ideal response?
Which of the following do costal cartilages connect?
A. The clavicles with the sternum B. The false ribs with the viscera and peritoneum C. The ribs with the sternum D. The true ribs with the scapula E. The floating ribs with xiphoid process
Which of the following is a muscle of the rotator cuff?
A) trapezius B) teres major C) deltoid D) teres minor E) coracobrachialis
The numbers listed represent the number of electrons in the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom?
A) 2 B) 2, 8 C) 2, 8, 1 D) 2, 8, 8