A&P Chapter 1 Test Answer Key
Homeostasis is the condition in which the body maintains ________.
a relatively stable internal environment, within limits
Which of the following is the regional term that includes the head?
axial
The ventral cavity includes which of the indicated subdivisions in the figure?
c, d, e
The body cavities that protect the nervous system are located in the ________ cavity.
dorsal
A coronal section divides an organ into superior and inferior portions.
false
The elbow is proximal to the shoulder.
false
The knee is proximal to the thigh.
false
Which of the following is an example of a positive feedback? withdrawing your hand from a painful stimulus, like a broken glass forming a platelet plug during blood clotting reducing of blood sugar by the hormone insulin shivering to warm your body up in cold weather
forming a platelet plug during blood clotting
What is a vertical section through the body, dividing it into anterior and posterior regions called?
frontal
The study of large body structures, visible to the naked eye, such as the heart is called ________ anatomy.
gross
Which subdivision of anatomy would include the study of individual cells?
microscopic anatomy
A structure that is composed of two or more tissue types that work together to perform specific functions for the body is a(n) ________.
organ
Which level of structural organization is considered to be the highest (most complex) level?
organismal
The anatomical position is characterized by all of the following EXCEPT ________. arms at sides palms turned posteriorly thumbs pointed laterally body erect
palms turned posteriorly
Positive feedback differs from negative feedback because ________.
positive feedback tends to enhance the triggering stimulus while negative feedback tends to return the body to a homeostatic balance or "ideal" level
In a homeostatic control mechanism, which component monitors the environment?
receptor
Some of the nerve endings in the skin are sensitive to changes in temperature. They are part of a negative feedback mechanism regulating body temperature. These nerve endings represent a(n) ________ in the negative feedback mechanism.
receptor
What is a vertical section through the body, dividing it into left and right, called?
sagittal
Which of the following is NOT an example of the same level of structural organization as that represented by image 6? smooth muscle blood vessel stomach skin
smooth muscle
Which directional term is used to describe the relationship of the skin to the skeletal muscles?
superficial
If the figure were used to represent the regulation of body temperature, the structures represented by the letter C could include __________.
sweat glands in the skin
Which of the following represents the correct order in which the components interact in a homeostatic control system? the effector, the stimulus, and the receptor the variable, the receptor, and the set point the receptor, the stimulus, and the effector the receptor, the control center, and the effector
the receptor, the control center, and the effector
The dorsal body cavity is divided into which of the following subdivisions?
the vertebral/spinal and cranial cavities
Which of these is NOT part of the dorsal cavity? cranial cavity thoracic cavity spinal cord vertebral cavity
thoracic cavity
What level of structural organization is represented by the image numbered 5 in the figure?
tissue
Generally, what is the result of the negative feedback process?
to maintain homeostasis
A tissue consists of groups of similar cells that have a common function.
true
Positive feedback mechanisms tend to enhance the original stimulus so that the response is accelerated.
true
Which of the following best defines anatomy? It is the study of how the body parts work and carry out their life-sustaining activities. It is the study of all chemical reactions that occur within body cells. It is the study of the structure of body parts and their relationships with one another. It is the study of tissues.
It is the study of the structure of body parts and their relationships with one another.
Which of the following is the proper description of the human body in the anatomical position? The body is erect with feet together, palms facing the thighs, and thumbs pointing forward. The body is erect with feet slightly apart and arms extending perpendicular to the torso along a straight line with the clavicle. The body is erect with feet together, palms facing backward, and thumbs pointing toward the body. The body is erect with feet slightly apart, palms facing forward, and thumbs pointing away from the body.
The body is erect with feet slightly apart, palms facing forward, and thumbs pointing away from the body.
Why is the figure considered to be an example of a negative feedback system, as opposed to a positive feedback system?
The figure illustrates the correction of an imbalance back to a baseline.
