The endocrine System

When levels go above or below a set point a hormone is released to return the body to set point. When the body is restored to set point no more hormone is released. This is an example of...

• a positive feedback loop
• a negative feedback loop
• a neutral feedback loop

Tags

NGSS.HS-LS1-3

Hormones are either steroid hormones (fat based hormones) or amino acid hormones (water soluble hormones). Which of the following statements is correct?

• melatonin and calcitonin are steroid hormones
• Estrogen, progesterone and testosterone are steroid hormones
• insulin and glucagon are steroid hormones
• testosterone and parathyroid hormone are amino acid hormones

The purpose of the endocrine system is to

• maintain homeostasis by reacting quickly to stimuli
• produce substances that protect the body from bacteria 
• maintain metabolism, growth and development in homeostasis 
• transport molecules throughout the body

Tags

NGSS.HS-LS1-3

Endocrine glands produce __________ which maintain the body in homeostasis

• oils
• neurotransmitters 
• tears
• hormones

Tags

NGSS.HS-LS1-3

Which of the following is an example of a positive feedback loop?

• regulation of body temperature at 37 degrees Celsius 
• regulation of blood sugar levels
• contractions during childbirth
• regulation of water levels in humans

Tags

NGSS.HS-LS1-3

The anterior pituitary produces the following hormone(s)

• oxytocin for uterine contraction and ADH (anti-diuretic hormone) for re-absorption of water by kidneys
• melatonin which controls wake/sleep cycles and calcitonin which stores calcium in bones
• prolactin which promotes milk production and growth hormone which promotes growth and development of bone and muscle
• parathyroid hormone which targets bone destroying cells (osteoclasts) to release stored calcium 

targets bone and muscle to promote growth and development

• growth hormone
• prolactin
• oxytocin
• ADH (antidiuretic hormone)

targets mammary glands which promotes the production of milk in mammals

• growth hormone
• prolactin
• progesterone
• parathyroid hormone

causes contractions of the uterus during childbirth

• growth hormone
• oxycotin
• oxytocin
• oxyclean

This hormone promotes metabolism (the chemical reactions that help you use the energy in the food you eat)

• T3 and T4

• calcitonin

• ADH

• metabolite