Chapter 1 - Introduction

Question 1

List the levels of organization

Answer 1

Cells, tissues(made of multiple of similar cell types), organs(made of multiple tissue), organ system, organism

Question 2

What is homeostasis

Answer 2

Maintenance of a relatively stable internal environment

Parameter

Question 3

Why is homeostasis important to maintain

Answer 3

Helps maintain temp, pH, sodium levels, etc. helps our body function properly

Question 4

What are the components of a feedback system to control homeostasis

Answer 4

Receptor - monitors specific stimulus or change
Control center - receives and processes info from receptor
Effector - organ that responds to control center to carry out the response - restore homeostasis

Question 5

Describe a negative feedback

Answer 5

Response moves parameter in opposite direction from original stimulus
(I.e. internal temp will go down if risen)

Question 6

Difference between positive/negative feedback

Answer 6

Positive feedback will respond in an enhanced form of original stimulus, negative will go the opposite

Question 7

How is structure related to function

Answer 7

Epithelial tissue lining the lungs is thin to allow gas to cross into blood stream
Sperm has flagellum to swim to egg

Question 8

What types of gradients drive many physiological processes

Answer 8

Temp, concentration, pressure

Question 9

Example of cell to cell communication

Answer 9

Nerve cell sends chemical messengers to muscle cells in tissue to contract, this causes the muscle cells to contract together causing movement