The movement of a particular amino acid across the cell membrane (along its conc
ID: 86295 • Letter: T
Question
The movement of a particular amino acid across the cell membrane (along its concentration gradient) is impaired when a molecule chemically similar to the amino acid is added to the extra cellular fluid. The movement of the amino acid through the membrane is by: A. Osmosis B. Diffusion C. Cellular ATP is used D. Vesicles are formed. E. The cell membrane changes shape The type of burn that may require a skin graft is a A. First degree burn B. Second degree burn C. Third degree burn D. Partial thickness burn E. Both C and D Merocrine sweat glands A. Are compound alveolar glands B. Produce organic secretions that are metabolized by bacteria to produce body odor. C Secrete a watery fluid directly onto the surface of the skin D. Increase in number and activity with aging E. Primarily function in lubricating the hairs Bone contains all of the following except A. Calcium phosphate B. Collagen fiber C. Calcium carbonate D. Chondroitin sulfate E. Hydroxyapatite TExplanation / Answer
10. B
Diffusion Definition
Diffusion is the movement of a fluid from an area of higher concentration to an area of lower concentration. Diffusion is a result of the kinetic properties of particles of matter. The particles will mix until they are evenly distributed.
Diffusion Examples
11. C
12. C
13. D
a: Seventy percent of bone is made up of hydroxylapatite, a calcium phosphate mineral
b: Collagen fiber has great tensile strength and is a major component of cartilage, bone, tendons, teeth, ligaments, skin etc
c: calcium carbonate is a common substance found in eggshells, snail shells and marine organisms. Its found in digestion remedies.
d: chondroitin sulphate is a structural element in cartilage
e: Seventy percent of bone is made up of the inorganic mineral hydroxylapatite
14. D
Irregular bones serve various purposes in the body, such as protection of nervous tissue (such as the vertebrae protect the spinal cord), affording multiple anchor points for skeletal muscle attachment (as with the sacrum), and maintaining pharynx and trachea support, and tongue attachment (such as the hyoid bone).
15. D
The foramen magnum (Latin: great hole) is a large oval opening (foramen) in the occipital bone of the skull in humans and various other animals. It is one of the several oval or circular openings (foramina) in the base of the skull.describes the foramen magnum?
bone forming the back and back part of the base of the cranium, the part of the skull that encloses the brain. It has a large oval opening, the foramen magnum, through which the medulla oblongata passes, linking the spinal cord and brain.