Embryonic cells that have the potential to become any cell type are called
The tissue that lines internal surfaces of the body is
What type of tissue is blood?
Which of the following represents the correct hierarchy of organization in the human body?
-cells —> tissues —> organs —> organ systems
Maintaining the volume and composition of body fluids is the direct responsibility of which system?
What we usually call the "back" of the human body is really the
The nervous system is produced by
Which of the following functions can the skin perform?
all of the above
UV light is necessary for the production of which vitamin?
Four of the five answers below pertain to smooth muscle, select the exception
The basic unit of the nervous system is
The resting potential of a neuron is approximately
Which is a junction between two neurons?
All nerves that conduct impulses away from the central nervous system are
Active chemicals found in chocolate, tea, coffee, and soft drinks are examples of which of the following?
A stretch receptor is classified as a
Receptors in the human nose are
The sense of equilibrium can detect
all of these
The part of the eye that may be colored (for example, brown, blue, green, or gray) is the
Which of the following act as signaling molecules?
hormones, neurotransmitters, and pheromones
Hormones are distributed throughout the body by the
Which gland secretes hormones that affect other endocrine glands?
The molting hormone of insects is:ecdsyone
Which organisms have a hydrostatic skeleton with a soft body wall?
Which organisms have a somewhat rigid internal skeleton and many muscles?
The mineral stored in greatest quantity in bones is
Bones in fingers or toes are called
The body's strongest weight-bearing bone is the
Which of the following muscle pairs are antagonistic?
bicepts and tricepts
Four of the five answers listed below are energy sources for muscles, Select the exception.
The main energy for prolonged muscle work comes from:
aerobic respiration of carbohydrates and fats
The pectoralis major muscle is located:
The most immediate, but necessarily limited, source of energy for reformation of ATP in muscle cells is:
A goiter is an enlarged form of which gland?: