Exam 3 Multiple Choice Flashcards

1
Q

The archenteron is characteristic of which stage of animal development?

A

C) gastrula

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2
Q

The release of cortical granules following fertilization leads to

A

D) erection of a fertilization membrane

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3
Q

The inner cell mass of a placental mammals blastula will become

A

A) the embryonic germ layers

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4
Q

The neural plate is derived from

A

A) ectoderm

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5
Q

Vertebrate skin is subject to abrasion against environmental substrata microorganisms that may cause disease, and terrestrial forms are exposed to dry air. What type of epithelium comprises skin?

A

E) Stratified squamous

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6
Q

A tendon is an example of

A

B) dense connective tissue

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7
Q

Most of the exchange surfaces of multicellular animals are lines with

A

D) epithelial tissue

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8
Q

Much of the coordination of the vertebrate body functions via chemical signals distributed by blood flow is accomplished by the

A

B) endocrine system

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9
Q

The process by which living things maintain fairly stable internal conditions necessary for survival is termed

A

E) homeostasis

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10
Q

As the body temperature of a bearded dragon rises, it seeks shade from the sun to cool itself. This is an example of

A

C) negative feedback

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11
Q

Which of the following is an effective means of conserving heat?

A

B) subcutaneous fat

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12
Q

Which of the following are considered inputs for thermal energy?

A

B) condensation

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13
Q

Somatic growth, reproduction and reserves represent __ of chemical energy?

A

C) storage

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14
Q

Which animal would you expect to have the lowest mass-specific (L O2/hr) metabolic rate?

A

D) elephant

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15
Q

The relatively hairless ventral (pubic) region of a dog is considered a(n)

A

B) heat window

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16
Q

Blood flows towards the heart in

A

B) pulmonary veins

17
Q

One-way valves are associated with

A

E) A, B, and C
(A: the heart, B: veins, C: lymph vessels)

A) the heart
B) veins
C) lymph vessels
D) capillaries

18
Q

The lowest pressure cardiovascular system is found in a(n)

19
Q

The primary driving force for the reabsorption of filtered plasma from the interstitial (extracellular) space is

A

B) colloidal osmotic pressure

20
Q

To adjust blood pressure independently in the capillaries of the gas-exchange surface and in the capillaries of the general body circulation, an organism would need a(n)

A

E) four-chambered heart

21
Q

Which of the following is the correct sequence of blood flow in reptiles and mammals?

A

D) vena cava => right atrium => right ventricle => pulmonary circuit

22
Q

The set of blood vessels with the lowest blood pressure driving flow is

A

E) the veins

23
Q

Which medium contains the least amount of oxygen?

A

B) marine water

24
Q

In an EKG, the QRS complex represents

A

E) B and C
(B: ventricular depolarization and C: atrial repolarization)

A) atrial depolarization
B) ventricular depolarization
C) atrial repolarization
D) ventriciular repolarization

25
Countercurrent exchange in the fish gill helps to maximize
C) diffusion of respiratory gases
26
Countercurrent exchange is evident in
A) the flow of water across the gills of a fish and that of blood within those gills
27
Thick-walled vessels embedded with smooth muscle and without valves describe
A) arteries
28
Capillaries are
E) all of these - high resistance - low flow - thin-walled - fenestrated
29
The most important variable governing resistance in blood vessels is
C) vessel radius
30
Lungs are invaginated structures so that
B) water loss can be minimized