endocrine system

Question 1

endocrine system

Answer 1

instructs glands to release hormones directly into the bloodstream which is then carried toward target organs in the body

Question 2

glands and hormones

Answer 2

various glands in the body such as the thyroid gland produces hormones

• hormones are secreted into the bloodstream and affect any cells in the body that has a receptor for that particular hormone
• most hormones affect cells in several organs or throughout the entire body
• main glands include hypothalamus, pituitary, thyroid and pancreas
• major gland is the pituitary gland in the brain, controls the release of hormones from all the other endocrine glands in the body

Question 3

fight or flight

Answer 3

• when a stressor is perceived, the hypothalamus triggers activity in the sympathetic branch of the ANS
• ANS changes from its normal parasympathetic state to sympathetic state
• stress hormone adrenaline is released from adrenal gland into the bloodstream
• adrenaline triggers physiological changes in the body eg increased heart rate which creates the physiological arousal necessary for the flight or fight response
• once threat has passed the parasympathetic nervous system returns to its resting state

Question 4

adrenaline

Answer 4

produced by adrenal glands
-has a strong effect on the cells of the cardiovascular system- stimulating the heart rate, contracting blood vessels and dislocating air passages