Exam 3 Multiple Choice Flashcards
The archenteron is characteristic of which stage of animal development?
C) gastrula
The release of cortical granules following fertilization leads to
D) erection of a fertilization membrane
The inner cell mass of a placental mammals blastula will become
A) the embryonic germ layers
The neural plate is derived from
A) ectoderm
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?
E) Stratified squamous
A tendon is an example of
B) dense connective tissue
Most of the exchange surfaces of multicellular animals are lines with
D) epithelial tissue
Much of the coordination of the vertebrate body functions via chemical signals distributed by blood flow is accomplished by the
B) endocrine system
The process by which living things maintain fairly stable internal conditions necessary for survival is termed
E) homeostasis
As the body temperature of a bearded dragon rises, it seeks shade from the sun to cool itself. This is an example of
C) negative feedback
Which of the following is an effective means of conserving heat?
B) subcutaneous fat
Which of the following are considered inputs for thermal energy?
B) condensation
Somatic growth, reproduction and reserves represent __ of chemical energy?
C) storage
Which animal would you expect to have the lowest mass-specific (L O2/hr) metabolic rate?
D) elephant
The relatively hairless ventral (pubic) region of a dog is considered a(n)
B) heat window
Blood flows towards the heart in
B) pulmonary veins
One-way valves are associated with
E) A, B, and C
(A: the heart, B: veins, C: lymph vessels)
A) the heart
B) veins
C) lymph vessels
D) capillaries
The lowest pressure cardiovascular system is found in a(n)
A) fish
The primary driving force for the reabsorption of filtered plasma from the interstitial (extracellular) space is
B) colloidal osmotic pressure
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)
E) four-chambered heart
Which of the following is the correct sequence of blood flow in reptiles and mammals?
D) vena cava => right atrium => right ventricle => pulmonary circuit
The set of blood vessels with the lowest blood pressure driving flow is
E) the veins
Which medium contains the least amount of oxygen?
B) marine water
In an EKG, the QRS complex represents
E) B and C
(B: ventricular depolarization and C: atrial repolarization)
A) atrial depolarization
B) ventricular depolarization
C) atrial repolarization
D) ventriciular repolarization
Countercurrent exchange in the fish gill helps to maximize
C) diffusion of respiratory gases
Countercurrent exchange is evident in
A) the flow of water across the gills of a fish and that of blood within those gills
Thick-walled vessels embedded with smooth muscle and without valves describe
A) arteries
Capillaries are
E) all of these
- high resistance
- low flow
- thin-walled
- fenestrated
The most important variable governing resistance in blood vessels is
C) vessel radius
Lungs are invaginated structures so that
B) water loss can be minimized
