In white blood cells, what contributes to phagocytes?

 

It is part of the rib cage and serves as an attachment site for some abdominal muscles.

Choice A is wrong because the hyoid bone is a U-shaped bone located in the neck, above the larynx. It does not articulate with any other bone and supports the tongue and laryngeal muscles.

Choice B is wrong because the ossa coxae are the hip bones that form the pelvic girdle. They are composed of three fused bones: ilium, ischium and pubis.

Choice C is wrong because sesamoid bones are small, round bones that are embedded in tendons.

They protect the tendons from wear and tear and increase their leverage. The most common sesamoid bone is the patella (kneecap).

The correct answer is choice B. Endocrine glands secrete chemicals into the blood. This is because endocrine glands are ductless glands that release their products (hormones) directly into the bloodstream, where they can reach their target cells throughout the body.

Choice A is wrong because salivary glands are exocrine glands, not endocrine glands. Exocrine glands secrete their products into ducts that lead to an internal or external surface.

Choice C is wrong because it describes exocrine glands, not endocrine glands. Exocrine glands release their secretions on an internal or external surface via ducts.

Choice D is wrong because it also describes exocrine glands, not endocrine glands. Endocrine glands do not secrete their products into ducts, but directly into the blood.

When the sympathetic nervous system is stimulated, it prepares the body for a fight-or-flight response by increasing the heart rate and blood pressure, which results in increased cardiac output.

Cardiac output is the amount of blood pumped by the heart per minute.

Choice B is wrong because increased pancreatic activity is not a result of sympathetic stimulation. The sympathetic nervous system inhibits digestion and reduces blood flow to the gastrointestinal tract.

Choice C is wrong because increased uterine activity is not a result of sympathetic stimulation. The sympathetic nervous system relaxes the smooth muscles of the uterus and other reproductive organs.

Choice D is wrong because increased gastrointestinal activity is not a result of sympathetic stimulation. The sympathetic nervous system inhibits digestion and reduces blood flow to the gastrointestinal tract.

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