ATI TEAS Science

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: C

Rationale: The correct answer is C (3). In a typical sensory pathway, there are three neurons involved: the primary sensory neuron, secondary sensory neuron, and tertiary sensory neuron. The primary sensory neuron transmits signals from the sensory receptor to the spinal cord or brainstem. The secondary sensory neuron carries the signal from the spinal cord or brainstem to the thalamus in the brain. Lastly, the tertiary sensory neuron carries the signal from the thalamus to the sensory cortex for processing. Therefore, a sensory pathway typically comprises three neurons to relay sensory information from the periphery to the brain. Choice A (1) is incorrect because sensory pathways involve multiple neurons for signal transmission. Choice B (2) is incorrect as it does not account for the tertiary sensory neuron involved in the pathway. Choice D (4) is incorrect because the typical sensory pathway consists of three neurons, not four.

Correct Answer: A

Rationale: The correct answer is A: The renal pelvis. The renal pelvis acts like a funnel by collecting urine from the millions of collecting tubules and delivering it to the ureters for excretion. The renal cortex and medulla are not directly involved in the collection and transportation of urine. Bowman's capsule is part of the renal corpuscle and is involved in the initial filtration of blood to form urine, not in the delivery of urine to the ureters. Therefore, the renal pelvis is the correct choice as it specifically functions to collect and funnel urine towards the ureters.

Correct Answer: A

Rationale: The correct order for increasing amounts of permitted motion is hinge joint (least mobile), condyloid joint, and saddle joint (most mobile). A: Hinge joint allows movement in one plane (least mobile), followed by condyloid joint with two planes, and then saddle joint with more freedom of movement. B: Incorrect order as saddle joint is more mobile than hinge joint. C: Incorrect order as hinge joint should be first, followed by condyloid and then saddle joint. D: Incorrect order as saddle joint should be the most mobile joint in the list.

Correct Answer: A

Rationale: The correct answer is A: A plasma membrane. Both prokaryotes and eukaryotes have a plasma membrane as their outer boundary. The plasma membrane is essential for maintaining cell integrity, controlling the passage of molecules in and out of the cell, and facilitating communication with the external environment. Prokaryotes lack a nucleus enclosed by a membrane (choice B), which is a defining feature of eukaryotic cells. Eukaryotes have organelles (choice C) that are membrane-bound structures, unlike prokaryotes that lack membrane-bound organelles. A nucleoid (choice D) is a region in prokaryotic cells where the genetic material is located, but it is not enclosed by a membrane like the nucleus in eukaryotic cells.