Exam 39: Physiology, Homeostasis, and Temperature Regulation

A sponge is an aquatic organism that brings its food in through pores using flagella on specialized cells to create an incurrent of water.This specialization in which cells have different functions within an organism is an advantage that is not possible in _______ organisms.

One of the responses of the human immune system to an infection is a raised body temperature, or fever.The adaptive value of the fever is that a raised body temperature

Cellular functions in most eukaryotic organisms are limited to a temperature ranging (in °C) from _______ to _______.

An adipose cell gets larger as it stores more lipids but is limited in how large it can get.A major reason for this is that as it gets larger,

Which statement is true?

Studies on racehorses have shown that when the starting gate closes just prior to a race, the breathing rate of a racehorse increases, even though the horse is standing still.This response is an example of

The testes release testosterone, and the rising levels of testosterone inhibit its further release.This is an example of

Which tissue type is likely to be found at any boundary where the inside of the body meets the external environment?

Refer to the graph showing how different types of organisms respond to changes in environmental temperature. If the endotherm in the graph is a mouse, at what environmental temperature(s) does the mouse leave its thermoneutral zone?

The metabolic rate of an organism is the total energy used by the animal and is usually measured as oxygen consumption.You measure the metabolism of an animal and find that its metabolic rate is 5.5 mL of oxygen per hour at 15°C and 11.5 mL of oxygen per hour at 25°C.Calculate the Q₁₀ for the metabolic rate of this animal.

An adult human is 60 percent water; a third of this water is in extracellular fluid, and 20 percent of extracellular fluid is in the blood.If a person weighs 200 pounds, the weight of the interstitial fluid bathing that person's cells weighs approximately _______ pounds.

The major thermoregulatory center ("thermostat") in mammals is located within the central nervous system in the _______ and uses _______ as feedback information.

If an animal is kept in an enclosure at a constant temperature equal to its body temperature, which mechanism is responsible for most of its heat gain?

Daily torpor is

In the countercurrent heat exchanger of a "hot" fish, heat is exchanged between

In terms of the predominant source of heat that determines its body temperature, an animal can be classified as an endotherm, ectotherm, or _______.

Hibernation is

Refer to the graph.In this experiment, the same fish were caught and brought into the lab in both winter and summer.Their metabolic rates (O₂ consumption) were measured at the pond temperatures for each season () and at other temperatures (). This experiment demonstrates the phenomenon of

Which statement is true?

Smooth muscle