Enzymatic
James-Lange theory
The nervous system consists of the brain, spinal cord, and nerves. Neurotransmitters are used as chemical messengers for this system. This system works at a fast rate. The endocrine system consists of glands like the pancreas, thyroid, testes, ovaries, adrenal, pituitary to name a few. The chemical messengers for the endocrine system are hormones. Endocrine glands are ductless. This system works at a slow rate.
Hormones are chemical messengers secreted into blood or extracellular fluid by one cell that affect the functioning of other cells. In very basic terms, binding of hormone to receptor triggers a cascade of reactions within the cell that affects function. I Have Placed A Likn In My Bio That You Can Check Out!!
Hypoxia in the blood triggers erythropoiesis.
Thyroid-stimulating hormone or TSH. When the thyroid is under-active the pituitary secretes more TSH to try to make the thyroid release its own hormones (T3 and T4).
emotion
In the most simplistic manner, hormones. Whether it is peptides or steroids they all come from glands in the endocrine system. These hormones control everything from growth, menstrual cycle, water reabsorption and beyond. The prominent endocrine pathway has three levels. First an action potental is sent to the hypothalamus which triggers the release of a releasing hormone into the hypothalamo-pituitary-portal vessel such as GnRH (gonadotropin-releasing hormone). This travels down to the anterior pituitary wich then triggers the synthesis and release of a stimulating hormone such as gonadotropins (FSH and LH). the last level is on the local level, FSH triggers the production of estrogens and/or testosterone in the gonads.
Tropic hormones are responsible for telling the body to secrete other hormones. They accomplish this by targeting endocrine glands. Most tropic hormones are secreted by the anterior pituitary.
the pancreas
stimulus
The stimulus is what triggers the reflex response.
luteinizing hormone
James-Lange theory
Yes, emotions can have a direct impact on the brain. Positive emotions like happiness can lead to the release of neurotransmitters that enhance brain function, while negative emotions like stress can affect brain structure and function, potentially impairing cognitive processes. Regular emotional regulation is important for maintaining overall brain health.
Because this question is so broad the broad answer would be a stimulus.
LuteinizingHormone is a hormone that promotes secretion of sex hormones.In females: It triggers ovulation.In males: It triggers leydigcells that produce testosterone.
Unconditioned Stimulus is an event or thing that automatically triggers a response. an example would be. when you smell your favorite food cooking, your mouth may salivate. the smell is an unconditioned stimulus which, in turn, brings rise to the salivating (unconditioned or conditioned response).