Exam 2

Question 1

CORT-Fitness Hypothesis

Answer 1

That Baseline CORT and fitness have a negative relationship together

Question 2

Sarcomere

Answer 2

Region of muscle between 2 discs

Question 3

Cooperativity

Answer 3

If one heme group on a given hemoglobin binds to O2, is likely that other 3 heme groups will bind. Define the way hemoglobin binds to O2

Question 4

Myoglobin cooperativity is _____

Answer 4

No cooperativity

Question 5

Hemoglobin cooperativity is ______

Answer 5

Coopertativity

Question 6

Sliding Filament Theory

Answer 6

How muscles contract by pulling on z-discs to shorten the muscle

Question 7

Tidal ventilation

Answer 7

Occurs by suction rather than buccal pressure in non-avian reptiles

Question 8

In resting skeletal muscle, contraction does not occur because

Answer 8

There i very little calcium in the cytoplasm

Question 9

Which of the following scenarios will results in dissolved gas coming out of the solution?
1) Collecting cold creek water, sealing the container, and allowing the sol’n to warm
2) Collecting warm water, sealing the container, and allowing the sol’n to cool
3) Collecting cold creek water, adding salt, sealing the container, and allowing the sol’n to warm
4) Collecting cold creek water, adding salt, sealing the container, and keeping the sol’n at the original temperature

Answer 9

1, 3, 4

Question 10

_____ is the law that related partial pressure and concentration in aqueous solutions

Answer 10

Henry’s law

Question 11

The process that occurs when a gas mixture or an aqueous solution flows and gas molecules in the fas or liquid phase are carried from place to place by the fluid flow is called

Answer 11

Convection

Question 12

During high-speed swimming, many fish rely on a method of ventilation called

Answer 12

Ram ventilation

Question 13

A vertebrate motor unit consists of

Answer 13

A single motor neuron and all of the muscle fibers that it innervates

Question 14

The diagram is referring to what physiological process?

Answer 14

Cross-current gas exchange

Question 15

At letter A in the diagram, O2 partial pressures are _____ the corresponding medium values and ______ from left to right

Answer 15

lower than; decrease

Question 16

Which of the following animals is likely to have the highest O2 and CO2 exchange percentage via the skin?

Answer 16

Lungless salamander

Question 17

Which of the following denotes the correct sequence of blood movement through the human heart?

Answer 17

Systemic vein –> right atrium –> right ventricle –> pulmonary artery –> pulmonary vein –> left atrium –> left ventricle –> aorta

Question 18

A muscle can produce maximal tension when it…

Answer 18

Starts from resting (intermediate) length

Question 19

Variation among species in the height of an oxygen equilibrium curve generally is a consequence of _______

Answer 19

Differences in the quantity of respiratory pigment per unit blood volume

Question 20

Diffusion of gases is dependent on _____

Answer 20

The difference in gas partial pressure

Question 21

The O2 partial pressure at which the blood is 50% saturated with O2 id known as the ______

Answer 21

O2 affinity

Question 22

Myoglobin has a higher oxygen affinity than hemoglobin.

Answer 22

True

Question 23

Relative to body size, respiratory surface area is greatest in ______

Answer 23

Endotherms

Question 24

_____ is the achievement of maximal muscle tension without muscle shortening

Answer 24

Isometric

Question 25

Oxygen affinity ________ as the temperature decreases.

Answer 25

Increases

Question 26

The surface area of the gas exchange membrane in birds is _____ than in amphibians

Answer 26

Higher

Question 27

Which biochemical mechanisms provide the majority of the ATP for short duration, powerful activities?

Answer 27

Glycolysis & Phsophogen

Question 28

Gases are exchanged in the fish gill via a process called ______ exchange

Answer 28

Counter current

Question 29

The shape of O2 equilibrium curves among species are different because _______

Answer 29

of the different forms of hemoglobin