Lecture 1: Homeostasis

Question 1

Body systems

Answer 1

skeletal, muscular, nervous, endocrine, cardiovascular, respiratory, digestive, urinary, reproductive, immune, integumentary

Question 2

Types of tissues

Answer 2

• epithelial = layers of cells lining a surface (e.g. skin)
• connective = extracellular matrix (e.g. bones, cartilage, fat)
• muscle = e.g. skeletal, smooth, cardiac
• nervous = e.g. brain, spinal tissue, nerves

Question 3

Metabolism

Answer 3

• catabolism = breakdown of large complex molecules into smaller ones
• anabolism = uses energy to build body’s structural and functional components

Question 4

Life processes

Answer 4

• metabolism, responsiveness, movement, growth, differentiation, reproduction

Question 5

Intracellular to extracellular examples

Answer 5

• from lumen of digestive tract to tissues

- respiratory system (alveoli to blood)

Question 6

Homeostasis elements

Answer 6

• change in a variable
• sensor/receptor
• integrator/control system
• effector
• response
• controlled variable back to normal

Question 7

Types of homeostasis mechanisms

Answer 7

• negative feedback (e.g. baroreceptors)
• positive feedback (e.g. childbirth)
• feedforward (e.g. ready for digestion)