ATI TEAS 7 Science

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 primary function of red blood cells is to transport oxygen. They contain hemoglobin, which binds to oxygen in the lungs and delivers it to tissues throughout the body. This process is essential for cellular respiration and energy production. Choice A is incorrect because while red blood cells do transport nutrients, their main role is oxygen transport. Choice C is incorrect because fighting infection is primarily the role of white blood cells. Choice D is incorrect as red blood cells do not produce antibodies; that is the function of specialized white blood cells called B cells.

Correct Answer: C

Rationale: The correct answer is C: Testosterone. Testosterone is crucial for stimulating sperm production in males as it is the primary male sex hormone responsible for regulating the development of male reproductive tissues. It plays a key role in the production of sperm cells in the testes. Estrogen (A) and Progesterone (B) are female sex hormones and do not have a direct role in sperm production. Insulin (D) is a hormone that regulates blood sugar levels and is not involved in the process of sperm production.

Correct Answer: B

Rationale: The correct answer is B: Refraction. Refraction occurs when light bends as it passes through different mediums of varying densities, such as hot air above a desert surface. This bending of light causes the mirage effect where distant objects appear distorted or displaced. Diffraction (A) is the bending of light around obstacles, not relevant in this context. Interference (C) involves the interaction of light waves, not applicable to mirages. Polarization (D) is the orientation of light waves, unrelated to the mirage effect in deserts.

Correct Answer: D

Rationale: The correct answer is D: Influenza. Influenza is caused by a virus, specifically the influenza virus. Step-by-step rationale: 1. Influenza is a contagious respiratory illness caused by the influenza virus. 2. Viruses are known to be the causative agents of influenza. 3. Asthma (A), Cystic Fibrosis (B), and Epiglottitis (C) are not caused by viruses; asthma is a chronic inflammatory disease, cystic fibrosis is a genetic disorder, and epiglottitis is usually caused by bacteria.