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Trang Tang
Physiology
Question | Answer |
---|---|
Processes for maintaining or restoring homeostasis are known as | set point mechanisms. |
Of the 11 major body systems, which is the least involved in maintaining homeostasis? | Reproductive |
Of the pathogenic organisms, which of the following are the most complex? | Tapeworms |
Intrinsic control: | is sometimes called autoregulation. |
A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. | False |
Proteins are polymers of | Amino acids |
A saturated fatty acid is one in which | all available bonds of its hydrocarbon chain are filled. |
When two amino acids are joined, a peptide bond is formed and an H+ ion is released. | False |
Meiosis is called “reduction division” because | the number of chromosomes is reduced by half. |
Facilitated diffusion is not an active transport process because it | does not depend on cell energy. |
Glycolysis occurs in what part of the cell? | cytoplasm |
Diffusion moves | down a concentration gradient. |
RNA makes proteins by | translation. |
Replication of DNA occurs in which phase of interphase? | M phase |
Which of the following statements is true? | The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm. |
Which is true about the sodium and potassium pump? | Three sodium ions are taken out of the cell. |
During which stage of mitosis do the centrioles move to the opposite poles of the cell? | Prophase |
Phagocytosis is an example of: | endocytosis. |
Which is not true about the sodium and potassium pump? | Sodium moves into the cell and potassium moves out of the cell. |
Diffusion requires: | a concentration gradient. |
The hair papilla consists of _____ tissue. | dermal |
Smooth muscles that produce goose pimples when they contract are the _____ muscles. | arrector pili |
In which skin layer does the process of keratinization begin? | Stratum granulosum |
Which cells electrically insulate axons to increase the speed of conduction? | Both A and B Schwann cells Oligodendrocytes |
Which of the following vitamins is(are) absorbed through the skin? | ALL, A, D and K |
Which of the following is not a characteristic of smooth muscles? | Having intercalated disks |
Why are osteocytes spread out in bone tissue? | Formation of osteoid spreads out the osteoblasts that formed the ossification centers. |
The fontenelles of an infant's skull consists of | fibrous membrane |
Which statement below is correct regarding fontanelles? | Allows for brain growth. The anterior fontanelle closes at about 2 years of age. The fontanelles are fibrous membranes. Correct Answer All of the above |
Hematopoietic stem cells that are found in red bone marrow can develop into a variety of different blood cells, including red blood cells, white blood cells, and platelets. | True |
The primary ossification center of a long bone is located: | in the diaphysis. |
Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. | False |
As the activity of osteoblasts increases, the: | Both B and C occur. amount of calcium in bone increases. level of calcium in the blood decreases. |
The minimal level of stimulation required to cause a fiber to contract is called the | threshold stimulus. |
Anaerobic respiration results in the formation of an incompletely catabolized molecule called | lactate . |
All of the following are characteristics of smooth muscle except: | thin and thick filaments are aligned in sarcomeres like skeletal muscles. |
Muscle contractions will continue as long as: | the calcium ions are attached to the troponin. |
The substance that attracts oxygen in the myoglobin molecule is: | Iron |
Which of the following statements is incorrect about motor units? | The more muscle fibers stimulated by a motor neuron, the more precise the movements of that muscle can be. |
All of the following are noninflammatory joint disorders except: | juvenile rheumatoid arthritis. |
The strength of a muscle contraction is influenced by the: | amount of load. initial length of muscle fibers. recruitment of motor units. All of the above are correct. |
Most body movements are _____ contractions. | isotonic |
Painful muscle contractions or involuntary twitches are called: | cramps |
The mechanisms that produce and maintain the resting membrane potential do so by producing a | slight excess of positive ions on the outer surface of the plasma membrane. |