Exam 21: Unifying Concepts of Animal Structure and Function

Use the following information to answer the following questions. The dune-burrowing spider Seothyra species lives in the Namib Desert on the southwestern coast of Africa. These spiders build silk-lined burrows with a sticky silk mat at the entrance to trap insect prey. While foraging during the day, the spider remains concealed in its burrow and shielded from direct sunlight when prey are not present. When insect prey become entangled in the sticky silk mat, the spider will run out of its burrow and capture the prey insects. During the day, environmental temperatures vary from 17 to 73°C (63-164°F). If a spider is forced to remain outside of its burrow, it shows signs of thermal stress at 49°C. When spiders are unrestrained, they spend more time waiting inside their burrows to keep their internal temperatures below 49°C, even when surface temperatures are above 65°C. In addition, spiders respond more quickly to prey stimuli during the hottest times of the day and capture prey in significantly less time when surface temperatures are above 49°C. The captured arthropods (prey) tend to succumb more quickly to hot surface temperatures; they are more lethargic and struggle less when captured at the high temperature ranges. -When foraging spiders are too hot,they retreat into their burrows.What type of feedback system does this indicate?

What kind of connective tissue has a matrix that is strong and flexible?

Most homeostatic mechanisms depend on ________.

If a person is suffering from heat stroke,which organ system is failing?

The basic unit of nervous tissue is the ________.

To study the effect of ambient (environmental) temperature on the metabolic rate of animals, a scientist takes a small animal and puts it in a sealed chamber with oxygen. The scientist measures the amount of oxygen used by the animal at different temperatures. The temperatures selected are those that the animal normally encounters in nature. The data from this experiment are in the table below. -At high temperatures this animal loses water rapidly.To prevent dehydration,this animal's nephrons should ________.

Which of the following is the most common type of connective tissue in the typical human body?

In humans,goosebumps are a vestige of a mammalian adaptation related to ________.

Connective tissue is different from the other major tissue types in that ________.

Which process describes the forcing of water and other small molecules from the blood into a kidney tubule?

Involuntary muscle includes ________.

Which of the following is TRUE of a typical skeletal muscle?

Which of the following animals is generating (producing)body heat to warm itself?

Which of the following generally makes skeletal muscle different from both smooth and cardiac muscle?

Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the tides.If this animal practices homeostasis with respect to the salt concentration of its body fluids,its salt concentration will show ________.

Which is the most abundant kind of tissue in most animals?

To study the effect of ambient (environmental) temperature on the metabolic rate of animals, a scientist takes a small animal and puts it in a sealed chamber with oxygen. The scientist measures the amount of oxygen used by the animal at different temperatures. The temperatures selected are those that the animal normally encounters in nature. The data from this experiment are in the table below. -Oxytocin controls the contractions of the uterus.Of which type of tissue is the uterus composed?

Use the following information to answer the following questions. The dune-burrowing spider Seothyra species lives in the Namib Desert on the southwestern coast of Africa. These spiders build silk-lined burrows with a sticky silk mat at the entrance to trap insect prey. While foraging during the day, the spider remains concealed in its burrow and shielded from direct sunlight when prey are not present. When insect prey become entangled in the sticky silk mat, the spider will run out of its burrow and capture the prey insects. During the day, environmental temperatures vary from 17 to 73°C (63-164°F). If a spider is forced to remain outside of its burrow, it shows signs of thermal stress at 49°C. When spiders are unrestrained, they spend more time waiting inside their burrows to keep their internal temperatures below 49°C, even when surface temperatures are above 65°C. In addition, spiders respond more quickly to prey stimuli during the hottest times of the day and capture prey in significantly less time when surface temperatures are above 49°C. The captured arthropods (prey) tend to succumb more quickly to hot surface temperatures; they are more lethargic and struggle less when captured at the high temperature ranges. -Based on the information in the paragraphs,spiders are ________.

Reabsorption is the movement of substances from the ________ to the ________.

One function of this organ system is ________.