Some neurons in the vagus nerve have synaptic connections to sinoatrial cells (pacemaker) in the heart. These neurons secrete acetylcholine, which ultimately results in a decreased heart rate. This is an example of

A. neural control.
B. endocrine control.
C. hormonal control.
D. exocrine control.
E. paracrine control.


Answer: A

Anatomy & Physiology

You might also like to view...

Discuss emulsification and indicate why it is important

What will be an ideal response?

Anatomy & Physiology

________ participate in both innate immunity and the immune response.

A. Helper T (TH) cells B. Regulatory T (TR) cells C. Cytotoxic T (TC) cells D. Natural killer (NK) cells E. Memory T (TM) cells

Anatomy & Physiology

Some protein channels in a cellular membrane are able to open or close in response to stimuli; because of this characteristic, these channels are called _________ channels.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Sperm develop from stem cells called

What will be an ideal response?

Anatomy & Physiology