Hill Ch 26: Diving Mammals: Behavior and Physiology

Most dives by Weddell seals are

Which statement is not supported by the data in the figure?

The figure best represents which behavior?

Which animal is typically the shallowest diver?

Which animal does not belong to the true (phocid) seal group?

Which of the following is shown by the data in the figure?

The data in the figure would not likely apply to which species?

If you were collecting diving data, which comparison would you expect to reveal the greatest physiological differences?

Which statement describes an early piece of evidence showing that circulatory function is sometimes radically altered during a dive?

Which statement regarding the diving reflex is true?

The amount of O2 stored in blood depends on the

Seals such as the Weddell seal, which are capable of long and deep dives, typically have blood-oxygen carrying capacities (per unit volume) that are ___ those of seals such as the stellar sea lion, whose dives are short and shallow.

Mass-specific myoglobin levels in the most accomplished divers such as the Weddell seal are ___ those of humans.

A large O2 store in the lungs is an advantage to a diver for which reason?

In general, diving mammals have lung volumes (per unit mass) that are ___ those of terrestrial mammals.

Which oxygen storage compartment tends to be the smallest in diving mammals?

What data is represented in the figure?

Which data in the figure represents the lungs?

Of the components shown in the figure, the one with the greatest effect on dive length in true (phocid) seals is

A decrease in heart rate specifically in response to diving is referred to as

During a landmark study by Bron (1966), regional vasoconstriction during a seal's dive was indicated by a measured lack of blood flow to the

Which structure receives little or no blood during a prolonged forced dive?

During a prolonged forced dive, vasoconstriction causes which cardiovascular parameter(s) to drop?

During a prolonged forced dive, vasoconstriction allows which cardiovascular parameter(s) to remain unchanged?

Which value was most likely the resting pre-dive heart rate for the animals represented in figure?

Suppose that the same parameter represented in the figure is measured in aquatic animals that are moved from water to air and terrestrial animals that are moved from air to water. In which animal would the change in the measured parameter be the smallest?

Measurements of which body component(s) are shown in the figure?

Which statement regarding the data presented in the figure is true?

Which statement regarding the data presented in the figure is the most accurate?

Metabolic limits on dive duration depend on which factor(s)?

The data in the figure show that compared to nondiving mammals, diving mammals have

The metabolic rate in freely diving free-ranging Weddell seals is ___ the metabolic rate of resting nondiving seals.

What is the primary stimulus for ventilation in diving mammals?

Following an extended dive, diving mammals require

In the landmark 1980 study by Kooyman et al. that produced the data in this figure, blood was collected from seals

According to the figure, approximately how long would it take an adult Weddell seal to metabolize the lactic acid accumulated from a 1-hour dive?

The data shown in the figure do not plot dives with durations longer than 80 minutes. What is a possible explanation for this?

The aerobic dive limit (ADL) is the ___ dive that can be undertaken without a(n) ___

According to a central hypothesis of diving physiology, it is adaptive for diving mammals to keep their dives shorter than their species-specific aerobic dive limit (ADL) because doing so maximizes ___ and minimizes ___

In diving mammals, more than ___ of dives are shorter than the ADL.

Diving mammals cannot reduce their metabolic rates while underwater by

Weddell seals employ which behavior(s) in order to reduce metabolic costs during a dive?

Decompression sickness occurs

Decompression sickness may result in

Diving mammals avoid decompression sickness

Which are advantages of alveolar compression during a deep dive? I) Prevention of N2 transfer into blood II) Reserve of O2 for use on ascent III) Prevention of CO2 transfer to lungs

Which statement is supported by the data in the figure?

Which statement is supported by the data in the figure?

What would be the best label for the x-axis in the graph?

The data in the figure represent _______ in fish removed from water.

Dives by Weddell seals are mostly

The deepest dives of Weddell seals are at a depth of about _______ m.

Which animal is the deepest diver?

An animal’s maximum possible blood store of O2 is calculated by

One the most consistent features of diving species of mammals is that, relative to terrestrial species, they have