teas 7 practice test science - Nurselytic

Correct Answer: B

Rationale: The thoracic duct is the largest lymphatic vessel in the body, responsible for draining lymph from most parts of the body except for the right upper quadrant. The jugular vein, subclavian vein, and aorta are not part of the lymphatic system; they are blood vessels and do not serve as lymphatic vessels.
Therefore, choices A, C, and D are incorrect as they are not associated with the lymphatic system's transport of lymph.

Correct Answer: B

Rationale: When a car brakes to a stop, friction between the tires and the road acts as an unbalanced force causing deceleration. This friction force opposes the motion of the car, resulting in a decrease in speed until the car comes to a complete stop.
Choice A is incorrect because if the forces were balanced, the car would not experience any deceleration.
Choice C is incorrect because if the force were unbalanced in the direction of motion, the car would continue to move instead of coming to a stop.
Choice D is incorrect because friction between the tires and the road does exert a force, causing deceleration.

Correct Answer: D

Rationale: Diabetic nephropathy, a complication of diabetes, affects the nephrons. Nephrons are the functional units of the kidneys responsible for filtering blood and producing urine. The high blood sugar levels associated with diabetes can damage the nephrons over time, leading to kidney dysfunction and, ultimately, kidney failure.

Choices A, B, and C are incorrect because diabetic nephropathy primarily impacts the nephrons in the kidneys, not the ureters, bladder, or urethra.

Correct Answer: A

Rationale: The endoplasmic reticulum (ER) is a network of membranes within the cell that plays a crucial role in protein and lipid synthesis. It consists of two types: rough ER, which is studded with ribosomes and involved in protein synthesis, and smooth ER, which is involved in lipid synthesis and detoxification. The ER's main function is to synthesize proteins and lipids, not just package and transport them. While the ER is involved in transporting these synthesized proteins and lipids to other parts of the cell or outside the cell, its primary role is in their synthesis. Breaking down macromolecules is primarily the function of lysosomes, which are membrane-bound organelles containing enzymes for digestion. Storing genetic material is the function of the nucleus, which houses the cell's DNA. The ER is not involved in storing genetic material.

Correct Answer: B

Rationale: When a person throws a ball horizontally, the initial force that propels the ball forward is the force of throwing (
A). However, the force that changes the direction of the ball's motion is the gravitational force (
B). Gravitational force acts vertically downward, causing the ball to follow a curved path. Air resistance (
C) and normal force from the ground (
D) do not directly change the direction of the ball's motion in this scenario.