a blood clot stimulating further clotting is an example of

ATI RN

ATI Anatomy and Physiology Online Practice

1. Which of the following best describes a blood clot stimulating further clotting?

A. a positive feedback mechanism.
B. a negative feedback mechanism.
C. a process turning itself off.
D. nervous system communication

Correct answer: A

Rationale: A blood clot stimulating further clotting is an example of a positive feedback mechanism. In positive feedback, the response enhances or amplifies the original stimulus, leading to an increase in the activity. In this case, the formation of a blood clot triggers more clotting activity, creating a cycle of increasing clot formation. Negative feedback mechanisms, on the other hand, work to maintain homeostasis by counteracting changes. Choices B, C, and D are incorrect as they do not accurately describe the situation of a blood clot stimulating further clotting.

2. Why are anatomy and physiology difficult to separate?

A. Physiological functions depend on anatomical structures.
B. Physiological functions in an organism are ongoing.
C. Body parts provide structural support.
D. Our understanding of physiology is changing more than our understanding of anatomy.

Correct answer: A

Rationale: Anatomy and physiology are difficult to separate because physiological functions depend on anatomical structures. The correct answer highlights the interdependence between the two disciplines; physiological functions are carried out by anatomical structures. Choice B is incorrect as it only states a characteristic of physiological functions without addressing the relationship with anatomy. Choice C is incorrect as it talks about body parts providing structural support, which is not directly related to the interdependence of anatomy and physiology. Choice D is incorrect because the rate of change in understanding does not necessarily dictate the difficulty of separating the two disciplines.

3. The removal of wastes produced by metabolic reactions is

A. metabolism.
B. absorption.
C. assimilation.
D. excretion.

Correct answer: D.

Rationale: The correct answer is 'excretion.' Excretion is the process of eliminating waste products produced by metabolic reactions from the body. Metabolism (Choice A) refers to the chemical processes that occur within a living organism to maintain life. Absorption (Choice B) is the process of taking in nutrients and fluids into the body. Assimilation (Choice C) is the process of absorbing and incorporating nutrients into the body after digestion. Therefore, excretion is the most appropriate term for the removal of metabolic wastes.

4. The term 'physiology' is related to

A. the Latin meaning of 'physical shape.'
B. the structure of internal organs.
C. the Greek for 'cutting up.'
D. the Greek for 'relationship to nature.'

Correct answer: D

Rationale: The term 'physiology' originates from the Greek words 'physis' (meaning nature) and 'logos' (meaning study or relationship). Therefore, the correct answer is 'the Greek for 'relationship to nature.' Choice A is incorrect as it refers to the Latin meaning of 'physiology,' not the Greek origin. Choice B is incorrect as it is specific to the structure of internal organs, not the overall study of nature. Choice C is incorrect as it refers to a different term related to dissection or anatomy, not physiology.

5. Macromolecules are built of?

A. Monomers
B. Incorrect
C. Not Applicable
D. None of the above

Correct answer: A

Rationale: The correct answer is A: Monomers. Macromolecules are built from smaller subunits called monomers. Monomers join together through chemical reactions to form larger molecules known as macromolecules. Option B is incorrect as it does not provide the accurate information regarding the composition of macromolecules. Option C is not applicable as it does not offer a relevant choice. Option D is incorrect because there is a specific answer related to the composition of macromolecules.