The reason the hypodermis acts as a shock absorber is that
it is located just below the epidermis and protects the dermis from shock
the major part of its makeup is adipose, which serves as an effective shock absorber
the cells that make up the hypodermis secrete a protective mucus that absorbs shock
it has no delicate nerve endings and can therefore absorb more shock
The Correct Answer is B
A. it is located just below the epidermis and protects the dermis from shock: The hypodermis is located beneath the dermis, not just the epidermis, and its role is more about cushioning and insulation rather than directly shielding the dermis from shock.
B. the major part of its makeup is adipose, which serves as an effective shock absorber: The hypodermis contains a large amount of adipose tissue that cushions underlying structures, distributes pressure, and absorbs mechanical shock.
C. the cells that make up the hypodermis secrete a protective mucus that absorbs shock: The hypodermis does not secrete mucus; this function is unrelated to connective tissue structure and physiology.
D. it has no delicate nerve endings and can therefore absorb more shock: The absence of many nerve endings does not make the hypodermis a shock absorber. Its cushioning effect is due to adipose tissue composition, not nerve distribution.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. glycogenesis:Glycogenesis is the process of converting glucose into glycogen for storage in the liver and muscles. When an endurance runner “carbo-loads,” she increases glycogen stores to provide a readily available energy source during prolonged exercise.
B. glycolysis:Glycolysis is the breakdown of glucose into pyruvate to produce ATP for immediate energy needs. It does not refer to storing glucose for future use, as occurs during carbo-loading.
C. gluconeogenesis:Gluconeogenesis is the formation of glucose from noncarbohydrate sources such as amino acids and glycerol, typically occurring during fasting or low-carbohydrate intake, not during carbohydrate loading.
D. glycogenolysis:Glycogenolysis is the breakdown of glycogen into glucose to supply energy during fasting or exercise, which is the opposite of the storage process during carbo-loading.
Correct Answer is D
Explanation
A. Lymphoma:Lymphoma arises from lymphatic tissue such as lymph nodes or lymphocytes. It does not originate in muscle tissue but rather in components of the immune system.
B. Carcinoma:Carcinoma develops from epithelial tissues such as the skin or the lining of organs. Since muscle tissue is mesenchymal in origin, carcinomas are not associated with muscle.
C. Leukemia:Leukemia originates in blood-forming tissues, particularly bone marrow, and results in abnormal proliferation of white blood cells. It is unrelated to muscle tissue.
D. Sarcoma:Sarcoma arises from connective tissues, including bone, cartilage, fat, and muscle. It is the cancer type associated with muscle tissue, specifically soft tissue sarcomas when involving skeletal or smooth muscle.
E. Melanoma:Melanoma develops from melanocytes, the pigment-producing cells in the skin. It does not originate in muscle tissue but in pigmented epithelial cells.
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