Letter b

Nervous system speed to respond
Fast
One gland releases a hormone that controls another hormone
Hormonal control
Parathyroid hormone
Lowers blood calcium levels
Calcitonin
Letter c

Acute secretion
Endocrine system duration of influence.
very long
Nervous system innervates the gland with neurons that stimulate the gland to secret the hormone.
Direct neural control
Epinephrine and Norepinephrine
Develops immune function
Thymosin
Letter a.

Cyclic secretion
Nervous system ability to be repaired.
Central NS no. Peripheral NS yes
The level of a chemical other than a hormone affects the endocrine glands.
Nonhormonal control
Insulin and glucagon
Pancreas
Increases blood glucose
Neurons of the hypothalamus that secrete neurohormones rather than neurotransmitters
Neurosecretory cells
Endocrine system effectors that it controls
Every cell in body
Example: The pancreas detects increased blood glucose levels to as the stimulus to secrete insulin.
Nonhormonal control
Calcitonin
Thyroid gland
Increases sympathetic response
Epinephrine and norepinephrine
Biologically active lipids that produce many effects in the body, including smooth muscle contraction, inflammation, and blood clotting
Prostaglandins
Nervous system strength of signal
Constant. (remember action potentials do not vary in strength)
Example: Anterior pituitary gland secretes Adrenocorticotropic hormone to cause release of cortisol from adrenal glands.
Hormonal control
Melatonin
Pineal gland
Increases blood calcium levels
Parathyroid hormone