Which of the following has (have) both endocrine and exocrine activity?

the pancreas

Penguins, seals, and tuna have body forms that permit rapid swimming, because

the shape is a convergent evolutionary solution to the need to reduce drag while swimming

Interstitial fluid

the route for the exchange of materials between blood and bloody cells

Tissues are composed of cells, and tissues functioning together make up

organs

An exchange surface is direct contact with the external environment is found in the

lungs

The absorptive epithelia in the gut are considered "polarized" because

the structures on the apical surface are different than those on the basal surface

An example of connective tissue is the

blood

Connective tissues typically have

relatively few cells and a large amount of extracellular matrix

If you gently twist your earlobe, it does not remain distorted because it contains

elastic fibers

The nourishment, insulation, and support for neurons is the result of activity by the

glial cells

Fibroblasts secrete

proteins for connective fibers

Blood is best classified as connective tissue because

its cells are separated from each other by an extracellular matrix

Muscles are joined to bones by

tendons

With its abundance to collagenous fibers, cartilage is an example of

connective tissue

All types of muscle tissue have

interactions between actin and myosin

All skeletal muscle fibers are both

striated and under voluntary control

The type of muscle tissue surrounding internal organs, other than the heart, is

smooth muscle

Food moves along the digestive tract as the result of contractions by

smooth muscle

The body's automatic tendency to maintain a constant and optimal internal environment is termed

homeostasis

An example of a properly functioning homeostatic control system is seen when

the kidneys excrete salt into the urine when dietary salt levels rise

An example of effectors' roles in homeostatic responses is observable when

an increase in body temperature results from involuntary shivering

In a survivably cold environment, an ectotherm is most likely to survive an extended period of food deprivation than would an equally sized endotherm because the ectotherm

invests little energy in temperature regulation

Humans can lose, but cannot gain, heat through process of

evaporation

An example of an ectothermic organism that has few or no behavioral options when it comes to its ability to adjust its body temperature is a

sea star, a marine invertebrate

The thermoregulatory response of an overheated dog in a very hot environment is impaired if the response causes

body temperature to increase to match the environmental temperature.

The panting responses that are observed in overheated birds and mammals dissipates excess heat by

evaporation

An example of an organism that has only behavioral controls over its body temperature is the

green frog

Most land-dwelling invertebrates and all of the amphibians

are ectothermic organisms with variable body temperatures

The temperature-regulating center of vertebrate animals is located in the

hypothalamus

Seasonal changes in snake activity are due to the fact that the snake

is more active in summer because it can gain body heat by conduction.

Panting by an overheated dog achieves cooling by

evaporation

Animals that migrate great distances would obtain the greatest energetic benefit of storing chemical energy as

fats