Chapter Questions
Distinguish between the following pairs of terms.a. Organs and organ systemsb. Simple squamous and stratified squamous epithelial tissuec. Loose and dense connective tissued. Skeletal and cardiac muscle tissuee. Neurons and neurogliaf. Negative and positive feedback
Where do epithelial tissues occur, and how are they named?
List and describe six types of connective tissue.
Explain the similarities and differences among the three types of muscle tissue.
What are the two main cell types in nervous tissue?
Use the Internet to research cosmetic surgery. Write a paragraph explaining how a plastic surgeon might manipulate each of the four main tissue types.
Explain how you use your organ systems (except your reproductive system) while you are exercising at the gym, and provide three hypotheses that might explain why identical workouts might feel easier on some days than others.
Describe how the circulatory system connects the digestive system with the urinary system.
Make a chart that compares and contrasts the organization of the animal body with that of a plant (see chapter 21 ).
What is homeostasis, and how is it important?
Provide nonbiological examples of negative and positive feedback, other than those mentioned in the chapter.
When a person gets cold, he or she may begin to shiver. If the weather is too hot, the heart rate increases and blood vessels dilate, sending more blood to the skin. How does each scenario illustrate homeostasis?
Observe what happens to the size of your eye's pupil when you leave a dark room and enter the sunshine. What happens in the opposite situation, when you enter a dark room? How do the opposing reactions of your eye illustrate negative feedback?
Birds and insects frequently collect nectar from plants. Birds are endothermic and insects are ectothermic. Do you think a greater mass of insects or of birds can be supported on $100 \mathrm{g}$ of nectar? Explain your answer.