Which of the following contribute to muscle weakness in an elderly person? Select all that apply.
_____ Aged muscle has fewer motor neurons.
_____ Aged muscle has fewer myofibrils.
_____ Aged muscle has more fat and fibrous tissue.
_____ Aged muscle contains disorganized sarcomeres.
__X__ Aged muscle has fewer motor neurons.
__X__ Aged muscle has fewer myofibrils.
__X__ Aged muscle has more fat and fibrous tissue.
__X__ Aged muscle contains disorganized sarcomeres.
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When blood passes through systemic capillaries, the oxygen saturation of hemoglobin changes
A. from about 99% saturated to about 25% saturated. B. from about 70% saturated to about 99% saturated. C. from about 98% to about 75% saturated. D. from about 40% to about 80% saturated.
Lymphatic vessels recover about ________ of the fluid filtered by capillaries
A) 50% B) 5% C) 25% D) 85% E) 15%
________ and respiratory movements move lymph upward through lymphatic vessels and trunks below the heart.
A. Heart contractions B. Osmotic pressure C. Skeletal muscle contractions D. Movement of internal organs
The substance commonly transported during facilitated diffusion is ________
A) Glucose B) Potassium C) Cytoplasm D) Sodium