Lecture 1: Organization & Homeostasis

Question 1

What are the 4 types of tissue?

Answer 1

• connective -> connects things
• epithelial -> protects, secretes, & absorbs
• muscle -> moves things
• nervous -> communication & control

Question 2

What are the systems in the body?

Answer 2

• integument -> protection
• skeletal & muscular -> structure & movement
• circulatory & lymphatic -> transport
• digestive -> breakdown & absorption of nutrients
• excretory -> removes waste from blood; osmoregulation
• reproduction -> fertilization; production & storage of gametes
• nervous -> transfers message b/w brain & body (electrochemical signals)
• endocrine -> regulates hormones that alters function fo cells (chemical signals)

Question 3

What body systems are involved with control & coordination?

Answer 3

nervous & endocrine

Question 4

What systems are known as exchange systems?

Answer 4

• digestive
• respiratory
• excretory
• circulatory/cardio

Question 5

What are the components of homeostasis?

Answer 5

• recpetor -> collects info & compares to set point
• set point -> value that factor should be; main set point is hypothalamus
• effector -> causes response to return to set point; muscle or gland

Question 6

What are the characteristics of the negative feedback system?

Answer 6

• returns to equilibrium
• normal water levels -> nothing
• high water levels -> ADH inhibition
• low water levels -> ADH secretion

Question 7

What are the characteristics of the postitive feedback system?

Answer 7

• moves AWAY from normal & short lived
• chemicals that stimulayte blood clotting
• hormones that trigger uterine contractions in birth
• changes that trigger fever

Question 8

What are the characteristics of the steady state system?

Answer 8

• maintain or alter metabolic rate to maintain contant temp.
• requires energy at all times