U1B interrelationship NERVOUS/ENDOCRINE

How does the nervous system work with the endocrine system

they detect internal and external stimuli to and bring about a response to maintain homeostasis in the body

what does the nervous system consist of

• brain

• spinal cord

• network of neurons

what does the motor neuron do

carries info to organ/muscles and glands from CNS

tell me how the flowchart of Nervous system works

stimulus-receptor-coordinator-motor neuron/effector-response

what are the 2 voluntary and involuntary responses called

somatic and autonomic

what is somatic

actions under conscious control hey are voluntary

how does the somatic nervous system work

• sensory neurons

• transmit impulses to CNS

• from receptors all over body

• motor neurons transmit impulses to the muscles

what is meant by the autonomic nervous system

actions without any conscious control they are also involuntary

• enable functioning of internal organs

what is meant by the term conditioning and list examples

possible to gain control voluntarily

• opening sphincter

• emptying bladder

when talking about the autonomic nervous system there are 2 responses

Sympathetic

• fight or flight EMERGENCY

Parasympathetic

• rest and digest DAY TO DAY BASIS

what is the endocrine system

glands that secrete hormones in bloods called ENDOCRINE GLANDS

what are hormones

chemicals secreted by glands that allow for more than 1 tissue to be targeted and allow for long term changes

in terms of messages are what are hormones

slow messengers

what are baroreceptors

pressure detectors

what are chemoreceptors

chemicals that detect stimuli in blood then signal to medulla oblongata to modify heart rate

how does the negative feedback system control increase in heart rate through baroreceptors

• increase in blood pressure detected by carotid baroreceptors

• heart rate decreases causing blood pressure to decrease

how does the negative feedback system control decrease of heart rate through baroreceptors

• decrease in blood pressure detected by carotid baroreceptor

• heart rate increase causing blood pressure to increase

how does fight or flight work in terms of hormones

• pituitary gland releases ACTHA

• acts on adrenal gland

• release cortisol from adrenal cortex

how does fight or flight work in terms of the nervous system

• sympathetic branch of the autonomic nervous system activated

• signal adrenal gland to release adrenaline from adrenal medulla

what are the effects fight or flight has on the body

• stimulates breakdown of glycogen-glucose (glycogenolysis)

• redirect blood flow away from digestive system towards muscle and brain

• causes erector pili muscles in skin to contract