What kind of tissue makes up vocal cords?

A. bind the hair root to the dermis:The hair root is anchored to the dermis by the hair follicle itself and connective tissue structures. The receptor does not play a role in binding or physical attachment of the hair root.

B. serve as a source for new epidermal cells for hair growth after the resting stage has passed:New epidermal cells for hair growth arise from the hair matrix at the base of the follicle. The root hair plexus is a sensory nerve ending, not a cell-generating structure.

C. allow the hair to assist in touch sensation:The hair follicle receptor, or root hair plexus, is a network of sensory nerve endings wrapped around the follicle. It detects movement of the hair, making hair an important component of the tactile sensory system.

D. cause apocrine gland secretion into the hair follicle:Apocrine gland secretion is controlled by hormonal and neural signals, but not by the root hair plexus. The plexus functions in sensation, not glandular stimulation.

A. acetyl CoA:Acetyl CoA is a critical intermediate in cellular respiration that enters the Krebs cycle. However, it is not the primary fuel source but rather a product derived from the breakdown of carbohydrates, fats, or proteins.

B. protein:Proteins can be used for energy when carbohydrates and fats are scarce, but they are primarily reserved for structural and functional roles such as enzyme production and tissue repair. Their breakdown for energy is less efficient and not the main source of fuel.

C. glucose:Glucose is the body’s preferred and most readily available fuel for cellular respiration. It undergoes glycolysis, the Krebs cycle, and oxidative phosphorylation to produce ATP efficiently, making it the main energy substrate under normal conditions.

D. fat:Fats provide a large energy reserve and yield more ATP per molecule than glucose, but they must undergo beta-oxidation before entering respiration pathways. They are slower to mobilize and not considered the immediate source of fuel.