Chapter 38

Which tissue type consisting of sheetlike layers of cells can both exchange oxygen and act as a barrier to bacteria? a. nervous b. epithelial c. connective d. muscle e. heart

Which of the following is a constant source of adult stem cells in a mammal? a. bone marrow b. pancreas c. basal lamina d. heart muscle e. kidney

A flexible, rubbery protein in connective tissue is called______, whereas a more fibrous, less flexible glycoprotein is called______. a. adipose; cartilage b. endocrine; exocrine c. sweat; hormones d. chondroitin sulfate; hydroxyapatite e. elastin; collagen

The bones of an elderly woman break more easily than those of a younger person. You would surmise that with aging, the cell type that diminishes in activity is the: a. osteocyte. b. osteoblast. c. osteoclast. d. chondrocyte. e. fibroblast.

Lifting weights will most increase the size of: a. skeletal muscle. b. smooth muscle. c. cardiac muscle. d. involuntary muscle. e. interlinked, branched muscle.

Which muscle types appear striated under a microscope? a. skeletal muscles only b. cardiac muscles only c. skeletal muscles and cardiac muscles d. smooth muscles only e. skeletal muscles and smooth muscles

Which of the following is not a homeostatic response? a. In a contest, a student eats an entire chocolate cake in 10 minutes, and his blood glucose level does not change dramatically. b. A jogger is sweating after a two-mile jog. c. The pupils in humans' eyes constrict when looking at a light. d. Physical activity increases carbon dioxide blood levels, which lowers blood \(\mathrm{pH}\) and increases breathing. e. Oxytocin is released by the hypothalamus during human childbirth.

When you exercise, a skeletal muscle increases its use of \(\mathrm{O}_{2}\), which reduces the concentration of \(\mathrm{O}_{2}\) in the muscle cells and sets up a requirement for increased \(\mathrm{O}_{2}\) uptake from the interstitial fluid. This is an example of: a. osmolarity. b. environmental sensing. c. integration. d. systemic homeostatic control. e. local homeostatic control.

The system that coordinates other organ systems is the: a. skeletal system. b. reproductive system. c. muscular system. d. nervous system. e. integumentary system.

Blood is often described as an atypical connective tissue. If you had to argue that blood is a connective tissue, what reasons would you include? What reasons would you include if you had to argue that blood is not a connective tissue?