Regulation Of Cardiac Activity

Which of the following is associated with a decrease in cardiac output?

1. Sympathetic nerves

2. Parasympathetic neural signals

3. Pneumotaxic center

4. Adrenal medullary hormones

Cardiac activities of the heart are regulated by :

A.	Nodal tissue
B.	A special neural centre in the medulla oblongata
C.	Adrenal medullary hormones
D.	Adrenal cortical hormones

Choose the correct answer from the options given below:

1.	A, C and D only
2.	A, B and D only
3.	A, B and C only
4.	A, B C and D