BIOL 240| HOMEWORK 4 | Questions and
answers | Updated RATED A+
what are the main functions of the endocrine system? what are the differences between
the endocrine and nervous system? - answer- functions
1. system of glands that secretes hormones directly into the blood stream
2. along with the CNS, it controls the body
difference: ONLY system whose organs are not connected
what are the differences between the endocrine and exocrine glands? - answer-
endocrine: hormones, secretes into the bloodstream, in highly vascularized areas
exocrine: sweat/saliva, transported by ducts, close to target cells
target cells - answer- cells with receptors for hormones
target organs - answer- organs that have target cells
hormones - answer- chemical triggers that stimulates other organs
types of hormones - answer- 1. amino acid-based hormones
- most abundant
- modified amino acids, peptides and proteins
- cells with elaborate rough ER
- secreted by exocytosis/secretory vacuoles
2. steroid hormones
- type of lipid derived from cholesterol
- secreted by diffusion/soluble
- extensive smooth ER
- produced by gonads and adrenal cortex
humoral - answer- in response to changing levels of ions or nutrients in the blood
neural - answer- stimulation by nerves
hormonal - answer- stimulation received from other hormones
pheromones - answer-
thymus - answer- - in between lungs
- function: hormones stimulate maturation of lymphocytes
- gets smaller with age
answers | Updated RATED A+
what are the main functions of the endocrine system? what are the differences between
the endocrine and nervous system? - answer- functions
1. system of glands that secretes hormones directly into the blood stream
2. along with the CNS, it controls the body
difference: ONLY system whose organs are not connected
what are the differences between the endocrine and exocrine glands? - answer-
endocrine: hormones, secretes into the bloodstream, in highly vascularized areas
exocrine: sweat/saliva, transported by ducts, close to target cells
target cells - answer- cells with receptors for hormones
target organs - answer- organs that have target cells
hormones - answer- chemical triggers that stimulates other organs
types of hormones - answer- 1. amino acid-based hormones
- most abundant
- modified amino acids, peptides and proteins
- cells with elaborate rough ER
- secreted by exocytosis/secretory vacuoles
2. steroid hormones
- type of lipid derived from cholesterol
- secreted by diffusion/soluble
- extensive smooth ER
- produced by gonads and adrenal cortex
humoral - answer- in response to changing levels of ions or nutrients in the blood
neural - answer- stimulation by nerves
hormonal - answer- stimulation received from other hormones
pheromones - answer-
thymus - answer- - in between lungs
- function: hormones stimulate maturation of lymphocytes
- gets smaller with age
