ATI TEAS Science

Correct Answer: B

Rationale: To find the molarity, we first need to calculate the moles of NaCl. Moles = mass / molar mass = 4.0g / (23.0g/mol + 35.5g/mol) = 0.056 moles. Next, we convert the volume to liters (120mL = 0.120L). Finally, molarity = moles / volume = 0.056 moles / 0.120L = 0.57 M (Choice B). Incorrect choices: A: 0.34 M - Incorrect calculation of moles or volume. C: 0.034 M - Incorrect calculation of moles or volume. D: 0.057 M - Incorrect conversion of volume to liters.

Correct Answer: C

Rationale: Nociceptors detect pain. They are specialized nerve endings that respond to potentially harmful stimuli. When activated, nociceptors send signals to the brain, resulting in the sensation of pain. Deep pressure (A) and vibration (B) are detected by other types of receptors, while temperature (D) is detected by thermoreceptors. Therefore, the correct answer is C because nociceptors specifically respond to pain stimuli.

Correct Answer: C

Rationale: The correct answer is C: Oxygen. Oxygen is a small, non-polar molecule that can easily move through the cell membrane by passive transport, specifically through simple diffusion. This process does not require energy input and occurs from areas of high concentration to areas of low concentration until equilibrium is reached. Complex sugars (A) are too large to pass through the membrane without assistance. Non-lipid soluble molecules (B) cannot pass through the lipid bilayer of the membrane. Molecules moving from areas of low concentration to areas of high concentration (D) require active transport, which involves the expenditure of energy.

Correct Answer: D

Rationale: Certainly! The correct answer is D because synergists assist primary movers (A), stabilize the point of origin while providing extra pull near the insertion (B), and help prevent unwanted movement at a joint (C). Synergists work together with the primary mover to facilitate smooth and efficient movement. Option A explains how synergists assist the primary movers in completing specific movements by adding force. Option B highlights the role of synergists in stabilizing the origin and providing additional force near the insertion point. Option C emphasizes that synergists help to stabilize the joint, preventing unnecessary movements and ensuring proper execution of the desired motion. Therefore, all the options (A, B, and C) collectively describe the functions of synergists, making option D the correct choice.

Correct Answer: C

Rationale: The correct answer is C, Epididymis. Sperm maturation occurs in the epididymis, a coiled tube located on the back of each testicle. Here, sperm gain motility and the ability to fertilize an egg. Seminal vesicles (A) and prostate gland (B) produce fluids that combine with sperm to form semen but do not play a role in sperm maturation. Vas deferens (D) is a tube that carries mature sperm from the epididymis to the urethra but is not the site of sperm maturation.