Which of the following results from the incomplete breakdown of glucose that occurs under anaerobic conditions?
Hydrochloric acid
Ketotic acid
Carbonic acid
Lactic acid
The Correct Answer is D
A. Hydrochloric acid is a strong acid produced in the stomach to aid in digestion, not a byproduct of glucose breakdown.
B. Ketotic acid is produced in conditions where fat metabolism predominates, especially during ketosis, not during anaerobic glucose breakdown.
C. Carbonic acid forms when carbon dioxide dissolves in water and is not related to glucose metabolism.
D. Lactic acid is produced during anaerobic respiration when glucose is broken down without sufficient oxygen. This occurs in muscles during intense exercise, leading to the accumulation of lactic acid, which causes the sensation of muscle fatigue. This is the correct answer.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The tricuspid valve has three leaflets and is located between the right atrium and right ventricle. It closes during ventricular contraction (systole) but does not have two leaflets.
B. The pulmonic valve has three leaflets and controls blood flow from the right ventricle to the pulmonary artery. It is closed during the systolic phase but is not the correct answer for having two leaflets.
C. The aortic valve has three leaflets and controls blood flow from the left ventricle into the aorta. It also closes during systole, but it does not have two leaflets.
D. The mitral valve, also known as the bicuspid valve, has two leaflets and is located between the left atrium and left ventricle. It closes during systole to prevent backflow of blood into the left atrium.
Correct Answer is D
Explanation
A. Generating and transmitting impulses is the primary function of nervous tissue, not connective tissue. Nervous tissue is responsible for carrying signals throughout the body.
B. Covering and lining body surfaces is the function of epithelial tissue, which forms the skin and the lining of organs, not connective tissue.
C. Contracting and bringing about movement is the function of muscle tissue, not connective tissue. Muscle tissue is responsible for contraction and body movement.
D. Connective tissue's main function is to bind other tissues together and provide structural support. It includes tissues such as bone, blood, cartilage, and tendons, all of which help support, protect, and connect other tissues and organs.
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