ati teas 7 science

Correct Answer: C

Rationale: The correct answer is C: Vitamin D. Vitamin D plays a crucial role in immune function by regulating the expression of genes involved in immune response. It helps in the production of antimicrobial peptides that defend against pathogens. Vitamin A is important for vision and skin health, not directly related to immune function. Vitamin B12 is essential for neurological function and red blood cell production. Vitamin E is an antioxidant that protects cells from damage but does not have a direct role in immune function. Therefore, the correct choice is Vitamin D as it directly supports immune system function.

Correct Answer: B

Rationale: The correct answer is B: Blood pressure. Blood pressure is the term for the pressure exerted by blood against the walls of blood vessels. It is a crucial indicator of cardiovascular health. Heart rate (A) is the number of times the heart beats per minute, not directly related to blood vessel pressure. Cardiac output (C) is the amount of blood pumped by the heart per minute, not the pressure exerted on blood vessel walls. Stroke volume (D) is the volume of blood pumped by the heart in a single contraction, not the pressure against blood vessel walls.

Correct Answer: D

Rationale: The correct answer is D: Hypertension. Hypertension, or high blood pressure, can lead to blood clots and stroke by causing damage to blood vessels and increasing the risk of clot formation. Elevated blood pressure can strain the blood vessel walls, making them more prone to damage and clot formation. This can lead to blockages in blood flow to the brain, causing a stroke. Aneurysm (A) is a weakened area in a blood vessel that can rupture but not necessarily cause blood clots. Arrhythmia (B) is an irregular heartbeat that can increase the risk of stroke but is not directly related to blood clot formation. Asthma (C) is a respiratory condition that does not directly cause blood clots or stroke.

Correct Answer: B

Rationale: The correct answer is B: Atom. An atom is the smallest unit of matter that retains the properties of an element. Atoms are made up of protons, neutrons, and electrons. A molecule (A) consists of two or more atoms bonded together. A compound (C) is a substance composed of two or more different elements chemically bonded. An element (D) is a pure substance made up of only one type of atom. Therefore, the smallest unit of matter is the atom.

Correct Answer: C

Rationale: The correct answer is C: Holding urine in the bladder for long periods is NOT recommended for optimal urinary system health. When urine is held for a long time, it can increase the risk of urinary tract infections and bladder issues. It can also lead to bladder distension and potential damage to the bladder muscles. To maintain urinary system health, it is crucial to empty the bladder regularly to prevent bacterial growth and support proper bladder function. Choices A, B, and D are recommended practices for optimal urinary system health. Limiting high-sodium foods helps reduce the risk of kidney stones and hypertension, consuming cranberry juice can help prevent urinary tract infections, and regular moderate-intensity exercise promotes overall health, including the urinary system.