Nervous, sensory, & endocrine systemsWinslow,
19 April 2011
References:
Hoefnagels,
Marielle. 2009. Biology, 1st ed.;
Mader,
Sylvia S. 2011. Inquiry into Life,
Nervous system
Central nervous system
Brain, spinal cord
Peripheral nervous system
Sensory nervous system, Motor nervous system
Neuron, dendrite, nerve cell body, axon, ganglion, nerve
Membrane
potential, depolarization pulse, synapse, neurotransmitter, receptor
Sensory system
Photoreceptors
Simple & complex
eyes
Mechanoreceptors
Ears (hearing & balance)
Touch
Chemoreceptors (taste and smell)
Pain, temperature
Hormones and endocrine system
Chemical messengers, travel
systemically, receptors
Anterior & posterior pituitary,
hypothalamus
Gonadotropins
(follicle-stimulating hormone & luteinizing hormone)
Regulate gonads, which
secrete sex hormones
Follicle-stimulating hormone
stimulates ovarian follicle in female mammal
Follicle (which becomes
corpus luteum) secretes estrogen and progesterone
Progesterone
stimulates lining of uterus in preparation for pregnancy
LH causes corpus luteum
to degenerate, causing drop in progesterone (if no pregnancy)
Endometrial lining of
uterus sloughs off (menstruation)
If pregnancy, embryonic chorion secretes human chorionic gonadotropin
hCG
maintains progesterone secretion by ovarian corpus luteum
Endometrium is maintained
In male, testes secrete testosterone
(male sex hormone)
Corticosterone,
epinephrine, insulin, glucagon
Positive & negative feedback
loops