Which hand position describes the anatomical position of a person who is standing erect with feet forward?.

 

This is because the anatomical position is a standard position that serves as a reference for the body. A person is said to be in anatomical position when they are standing erect with their feet together, their hands at their side, with the palms facing forward. Unless otherwise stated, most anatomical descriptions will refer to a person when in anatomical position.

Choice A is wrong because palms of the hand facing medially means that the palms are facing toward the midline of the body, which is not the case in anatomical position.

Choice B is wrong because palms of the hand facing laterally means that the palms are facing away from the midline of the body, which is also not the case in anatomical position.

Choice D is wrong because palms of the hands facing posteriorly means that the palms are facing toward the back of the body, which is opposite to the anatomical position.

Red bone marrow is the site of blood production in infants after birth. Red bone marrow is found in the spongy tissue of some bones, such as the sternum, ribs, pelvis, and vertebrae.

Choice B is wrong because red pulp in the spleen is involved in filtering and recycling old red blood cells, not producing new ones.

Choice C is wrong because the heart is not a site of blood production, but a pump that circulates blood throughout the body.

Choice D is wrong because sinusoids of the liver are enlarged capillaries that allow blood to flow from the portal vein to the hepatic vein. They are not involved in blood production

The correct answer is choice C. DNA. DNA carries the genetic information in the cells of all living organisms. It contains codes for the assembly of amino acids into all the proteins required in the body. The sequence of bases in a DNA molecule can determine the order of amino acids in a protein molecule. Groups of three bases called codons represent different amino acids. This is the basis of the genetic code.

Choice A is wrong because mRNA is a type of RNA that carries the genetic information from DNA to the ribosomes, where protein synthesis takes place.

mRNA is not the original carrier of the genetic code, but a messenger that transfers it.

Choice B is wrong because tRNA is a type of RNA that brings amino acids to the ribosomes, where they are joined together to form proteins. tRNA has a complementary sequence to mRNA, called an anticodon, that allows it to pair with the correct codon on mRNA.

Choice D is wrong because chromosomes are structures made of DNA and proteins that contain many genes.

Chromosomes are not the carriers of the genetic code, but the structures that organize and store it.

Choice E is wrong because nucleotides are the building blocks of DNA and RNA. Nucleotides are composed of a nitrogenous base, a sugar, and a phosphate group.

Nucleotides are not the carriers of the genetic code, but the units that make up the code.

The correct answer is choice D. Carrots and squash. These foods are rich in carotenoids, which are orangey-red pigments that can accumulate in the skin and cause a yellowish or orangey discoloration. This condition is called carotenemia and is usually harmless and reversible by reducing the intake of carotenoid-rich foods.

Choice A is wrong because spinach and mustard greens are not high in carotenoids, but rather in chlorophyll, which is a green pigment that does not affect skin color.

Choice B is wrong because turnips and beets are not high in carotenoids, but rather in betalains, which are red or yellow pigments that are mostly excreted in urine and do not accumulate in the skin.

Choice C is wrong because rice and eggs are not high in carotenoids, but rather in protein and starch, which do not affect skin color.