Organs That Come Into Contact with the Environment Are Lined with Which One of the Following

Chapter 40.

1. Organs that come into contact with the environment are lined with which one of the following types of tissue?

a. smooth muscle

b. epithelial

c. adipose

d. loose connective

e. skin

2. Cells that secrete cartilage are called _____.

a. fibroblasts

b. osteons

c. chondrocytes

d. adipocytes

e. stem cells

3. Ligaments connect _____ to _____.

a. muscle ... tendon

b. tendon…tendon

c. tendon ... bone

d. muscle ... bone

e. bone…bone

4. Myosin and actin are _____.

a. proteins that play a major role in muscle contraction

b. part of a negative feedback loop

c. types of skeletal muscle

d. found localized in intercalated disks

e. unique to cardiac muscle

5. Each skeletal muscle fiber _____.

a. has striations

b. consists of a single cell

c. contains many parallel contractile units called myofibrils

d. contains many nuclei

e. all of the above

6. Negative feedback is a method of homeostatic control that _____.

a. increases the speed and rapidity of negative responses

b. counteracts a change in a condition by causing the change to either moderate or stop

c. promotes decreases in metabolism rather than increases

d. produces a response by lowering some set point of an organism's metabolism

e. causes an effector to signal the control center of an organism, which creates the stimulus to make a response

7. When a jogger starts to run, the rate at which his muscles produce CO2 rises sharply. But the CO2 in his blood rises only slightly before he starts to breathe faster and his heart starts beating stronger. Soon his increased rate of CO2 production is balanced by an increased rate of CO2 removal. This would be an example of _____ feedback because the jogger's circulatory and respiratory systems are _____.

a. positive ... improving the operating conditions in the jogger's body

b. negative ... acting to oppose the increase of CO2 from the preferred concentration

c. positive ... decreasing the CO2 concentration

d. positive ... restoring the CO2 concentration to the set point

e. negative...acting in opposition to one another

8. The term "endotherm" refers specifically to _____.

a. a warm-blooded animal

b. a cold-blooded animal

c. an animal that gets most of its body heat from its metabolism

d. an animal that temporarily abandons warm-bloodedness

e. an animal that regulates its body temperature by its behavior

9. On a cold day, blood vessels in the skin _____.

a. dilate, allowing blood to keep the skin warm

b. constrict, forcing blood to flow through vessels in the skin

c. constrict, reducing heat loss from blood at the surface

d. dilate, causing blood to pass through the cold skin more quickly

e. dilate, preventing blood flow to the surface

45.

Chapter 40 “Big Topics.”

·  The Four Main Categories of Tissues

·  Analogy vs. Homology

·  Conduction, Convection, Radiation