ScienceBiologyChapter 40 Second
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Chapter 40 Second

Viola Reed avatar Viola Reed
25 July 2022
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question
What type of muscle is responsible for contractions of the digestive tract and arteries?
answer
smooth muscle
question
Cardiac muscle is the only muscle composed of _____ fibers.
answer
Branched
question
_____ muscle is attached to bones.
answer
skeletal
question
Which of these is an example of negative feedback?
answer
After you eat, insulin stimulates the lowering of blood sugar levels.
question
Which term describes a mechanism by which the internal conditions of an organism are kept at set values without regard to the external conditions?
answer
Regulatory homeostasis.
question
Which of the following actions is not a function of the epithelium?
answer
Allows the internal environment to alter its conditions to match those of the external environment.
question
True or false? Organisms must maintain homeostasis because optimal enzyme activity is achieved within a very narrow range of conditions.
answer
True (Enzyme activity depends on conditions within a cell, such as temperature and pH, which must be kept within a certain narrow range.)
question
Which component of a homeostatic system sends instructions based on sensory information?
answer
Integrator.
question
Which component of a homeostatic system perceives changes in some parameter of the environment?
answer
sensor
question
Which of the following actions acts to warm a homeothermic body?
answer
Shivering.
question
Which of the following statements describes a negative feedback response?
answer
After a meal, blood sugar levels in the body rise; insulin is secreted to lower blood sugar levels.
question
Metabolic rate is _____.
answer
the total amount of energy an animal uses in a unit of time ( There are many variations of the measurement, such as basal metabolic rate and standard metabolic rate.)
question
Choose the list that correctly ranks metabolic rates per gram of body mass, from lowest to highest
answer
Fish, dog, mouse; (Fish are ectotherms, typically having lower metabolic rates than endothermic mammals and birds; furthermore, a mouse is much smaller than a dog, with a higher metabolic rate per gram of body mass.)
question
Much of the coordination of vertebrate body functions via chemical signals is accomplished by the _____.
answer
endocrine system
question
If you were to view a sample of animal tissue under a light microscope and notice an extensive extracellular matrix surrounding a tissue, which tissue type would you most suspect?
answer
Connective tissue
question
All animals, whether large or small, have _____.
answer
all of their living cells surrounded by an aqueous medium.
question
Of the following choices, the epithelium with the shortest diffusion distance is _____.
answer
simple squamous epithelium
question
The cells lining the air sacs in the lungs make up a _____.
answer
simple squamous epithelium
question
How do endotherms and ectotherms differ?
answer
Endotherms and ectotherms differ in the means by which they regulate their body temperature.
question
Which statement about endotherms and ectotherms is correct?
answer
Ectotherms are more abundant and diverse than endotherms.